WO2006033392A1 - コーディエライト質ハニカム構造体の製造方法 - Google Patents
コーディエライト質ハニカム構造体の製造方法 Download PDFInfo
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- WO2006033392A1 WO2006033392A1 PCT/JP2005/017483 JP2005017483W WO2006033392A1 WO 2006033392 A1 WO2006033392 A1 WO 2006033392A1 JP 2005017483 W JP2005017483 W JP 2005017483W WO 2006033392 A1 WO2006033392 A1 WO 2006033392A1
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- cordierite
- raw material
- alumina source
- cam
- alumina
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
- C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
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- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
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Definitions
- the present invention relates to a method for producing a cordierite clay-cam structure. More details
- the present invention relates to a method for producing a cordierite-like two-cam structure capable of obtaining a cordierite-like no-cam structure with reduced pressure loss.
- DPF diesel particulate filter
- Such a cordierite-like noble-cam structure is obtained, for example, by using a cordierite-forming raw material containing an alumina source raw material as an alumina source, and the obtained clay is formed into a honeycomb shape.
- a cordierite-forming raw material containing an alumina source raw material as an alumina source To obtain a hard cam molded body in which a plurality of cells are defined by partition walls, and then drying the obtained non-cam molded body to obtain a honeycomb dried body, and firing the obtained non-nickum dried body.
- the her cam filter using the her cam structure manufactured as described above is used by being mounted on an exhaust system of a diesel engine, the engine performance can be sufficiently exerted. Thus, reduction of the pressure loss is required.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-40687
- the present invention has been made in view of such problems of the prior art, and is a cordierite honeycomb capable of obtaining a cordierite no-cam structure with reduced pressure loss.
- a method for manufacturing a structure is provided.
- an alumina source raw material contained in a cordierite forming raw material used in a conventional method for producing a hard cam structure is Particles with a relatively low degree of circularity, i.e., composed of a relatively large number of flat particles, and when extruded using such clay, the flat particles are formed into a honeycomb.
- the fact that the pores of the porous body are not formed sufficiently on the surface of the body partition walls is the cause that hinders the reduction of the pressure loss of the hard cam structure as the final product. I found out.
- the present invention has been completed by conceiving that the above problems can be solved by using an alumina source material containing alumina source material particles having a predetermined shape in a predetermined ratio. That is, according to the present invention, the following method for producing a cordierite-like no-cam structure is provided.
- An alumina source raw material, a silica source raw material, and a magnesia source raw material are added to obtain a cordierite raw material, and a clay is obtained using the obtained cordierite raw material.
- a clay is obtained using the obtained cordierite raw material.
- a cordierite-containing material is obtained by adding 10% by mass or more of the first alumina source material having an average particle diameter of 1 to LOm to the total mass of the cordierite material.
- [0010] [2] The method for producing a cordierite-like two-cam structure according to the above [1], wherein alumina and Z or aluminum hydroxide hydroxide are used as the first alumina source material. [3] The method for producing a cordierite-like knot-cam structure according to [1] or [2], wherein the first alumina source raw material has a circularity of 0.80 or more.
- An alumina source raw material, a silica source raw material, and a magnesia source raw material are added to obtain a cordierite rice bran raw material, and a clay is obtained using the obtained cordierite forming raw material.
- a clay is obtained using the obtained cordierite forming raw material.
- a cordierite-like no-cam structure obtained by calcining the dried hermum body, wherein the cordierite raw koji raw material has at least a circularity of 0.70 or more as the alumina source raw material.
- cordierite-like hardcomb obtained by adding 10% by mass or more of the first alumina source material having an average particle size of 1 to L0 m to the total mass of the cordierite raw material. Structure.
- the cordierite-like two-cam structure is a porous body, and the partition wall constituting the cordierite-nominee-cam structure has a flat surface.
- cordierite with reduced pressure loss is formed by forming a large number of pore openings on the surface of the partition walls.
- a quality-cam structure can be obtained. This makes it possible to reduce the pressure loss while maintaining the composition and porosity of the cordierite hard structure as a product, and it is excellent in impact resistance and heat resistance. You can get cordierite quality cam-structure. Further, when the obtained cordierite-like hard structure is used as a catalyst carrier, it can be suitably used because the catalyst is easily supported on the surface of the partition wall.
- FIG. 1 shows an embodiment of a method for producing a cordierite-like knot-cam structure according to the present invention.
- FIG. 3 is a perspective view showing an example of a cordierite-like nodule-cam structure obtained as a result.
- a cordierite raw material is obtained by adding an alumina source raw material, a silica source raw material and a magnesia source raw material.
- a cordierite cake material was used to obtain a clay, and the resulting clay was extruded into a honeycomb shape to obtain a hard cam molded body in which a plurality of cells were partitioned by partition walls.
- the nonicum molded body was dried to obtain a honeycomb dried body, and the obtained nonicum dried body was fired to produce a cordierite hard structure (hereinafter, simply referred to as “nanocam structure”).
- a cordierite-like knob-cam structure for producing an alumina source material having at least a circularity of 0.70 or more (that is, a circularity of 0.70 to a perfect circularity). 1 to 1.00) and the average particle size is 1 ⁇
- a cordierite-based kneaded material obtained by adding 10% by mass (ie, 10 to: L00% by mass) or more of the first alumina source material of LO / zm to the total mass of the cordierite-forming material.
- the aluminum source material constituting the cordierite forming raw material for obtaining the clay is particles having a relatively low degree of circularity, that is, relatively flat.
- the relatively flat surface of the extruded hard cam formed on the partition wall is used.
- the aluminum source material particles were arranged, the pores were not formed so much on the surface of the partition walls.
- At least an alumina source raw material has a circularity of 0.70 or more. (Ie, 0.70 ⁇ : L.00) and the first alumina source having an average particle diameter of 1 ⁇ 10 / ⁇ ⁇ Since the raw material is used in an amount of 10% by mass or more (that is, 10-100% by mass) with respect to the total mass of the cordierite rice bran raw material, the curvature of the particle surface is reduced when the alumina source material particles are arranged on the surface of the partition wall. Thus, a gap is formed, and this gap becomes an opening of the pore, and the pressure loss of the cordierite-like nodule-cam structure obtained can be reduced.
- the alumina source raw material particles are particles that can function particularly effectively as an aggregate, with many of the cordierite rice bran raw materials having a relatively high melting point.
- the pressure loss can be reduced even if the composition and porosity of the cordierite-like honeycomb structure as a product are maintained. Therefore, it is possible to obtain a cordierite nano-cam structure which is excellent in impact resistance and heat resistance.
- the catalyst when used as a catalyst carrier, since there are many pore openings on the surface of the partition wall, the catalyst can be used easily and easily.
- circularity in the present specification is an index indicating how much the shape of a target particle when viewed in plan is deviated from a perfect circle, and is a flow particle image analyzer.
- FPIA-2000 manufactured by Sysmettas Co., Ltd., etc.
- the projected area S and the perimeter L of the particle are measured, and the circularity calculated based on the following formula (1) It means SD.
- the circularity of 1.00 is a perfect circle, and the smaller the value, the greater the deviation from the perfect circle.
- the term "average particle size” refers to an X-ray transmission type particle size distribution measuring apparatus that uses a liquid phase sedimentation method of a stowage as a measurement principle and performs detection by an X-ray transmission method.
- the measurement range of Cedigraph 5000-02 is 0.1 to 300 ⁇ m.
- a cordierite-like nodule-cam structure produced by the cordierite-like two-cam structure producing method of the present embodiment includes a plurality of porous partition walls 2 as shown in FIG. This is a cordierite nodule-cam structure 1 in which the cells 3 of FIG.
- this cordierite noble-cam structure 1 is composed of an alumina source material and silica.
- the clay is obtained, and the obtained clay is extruded into a no-cam shape, A no-cam molded body in which a plurality of cells are partitioned by partition walls is obtained, and the resulting hard-molded body is dried to obtain a honeycomb dried body, and the obtained honeycomb dried body is fired.
- cordierite rice bran raw material has at least a circularity of 0.70 or more as an alumina source raw material (i.e., circularity from 0.70 to perfect circularity) 1.00) and an average particle size of 1 to: LO / zm of the first alumina source material is 10% by mass or more with respect to the total mass of the cordierite potato raw material (that is, 10 to: L00 mass%) ) In addition.
- the overall shape of the resulting cordierite clay-cam structure 1 is not particularly limited.
- the cell shape (cell shape in a cross section perpendicular to the cell 3 formation direction) is not particularly limited.
- a hexagonal cell, a triangular cell, a circular cell, etc. The shape of a cell etc. can be mentioned.
- Such a cordierite nose-cam structure can be used as a catalyst carrier by, for example, supporting a catalyst on the surface of porous partition walls or pores.
- one opening portion and the other opening portion of a plurality of cells are alternately plugged and used as a filter.
- the cordierite nose-cam structure manufactured by the cordierite hard cam structure manufacturing method of the present embodiment constitutes a cordierite nose-cam structure.
- the ratio of the area of the pore openings formed on the surface of the partition wall to the total area when the partition wall surface is a flat body (hereinafter simply referred to as “the ratio of the pore opening area”)
- the force is preferably 30 to 50%.
- the ratio of the opening area of the pores is within the above-described range, the pressure loss is reduced while maintaining sufficient mechanical strength for use in a filter or the like.
- the ratio of the opening area of the above-mentioned pores is determined by imaging the surface of the partition wall of the obtained cordierite nodule-cam structure with a scanning electron microscope (SEM), and obtaining the obtained image by image processing.
- SEM scanning electron microscope
- the surface of the partition is made flat, It can be calculated by obtaining the opening area of the pores formed on the surface and obtaining the obtained value force ratio.
- an alumina source raw material, a silica source raw material and a magnesia source raw material which are alumina sources, silica sources, and magnesia sources in the dielite composition
- a cordierite rice bran raw material Add a dispersion medium such as water to the raw material and mix and knead to obtain a clay.
- the term “dielite raw material” means a substance that can be converted into dielite by firing, and specifically, is a mixture containing the above-mentioned silica source material, alumina source material, and magnesia source material.
- these raw material particles are mixed so that the composition after firing becomes the theoretical composition of dielite (2MgO'2AlO'5SiO), specifically, the silica source raw material
- the method for producing the dielite-cam structure of the present embodiment has a circularity of 0.70 or more (that is, 0.70 to L00) and an average particle size as at least an alumina source material. It is characterized by adding cordierite rice bran raw material by adding 10 mass% or more (ie 10-: L00 mass%) of the first alumina source material with a force of ⁇ 10 / zm to the total mass of the dieliteized raw material. And
- the alumina source material may be particles such as alumina, a composite oxide containing alumina, or a substance that is converted to alumina by firing. However, it is preferable to use alumina or aluminum hydroxide (Al (OH)) particles, which are commercially available with few impurities.
- Al (OH) aluminum hydroxide
- lumina and aluminum hydroxide aluminum particles it is more preferable to use lumina and aluminum hydroxide aluminum particles in combination.
- particles such as force line (Al 2 O 2 SiO 2 ⁇ ⁇ ) and mullite (3A1 2 O 2SiO) are separated from the alumina source and silica.
- the alumina source material contains more than a predetermined ratio of the first alumina source material having the above-mentioned shape, other alumina source materials necessary to realize the theoretical composition of dielite.
- the circularity of the first alumina source material is preferably 0.80 to: L 0 0, and particularly preferably 0.85 to: L 00. .
- the circularity of the first alumina source material becomes higher, that is, as the first alumina source material becomes more spherical, more pore openings are formed on the partition wall surface, and the resulting cordier is obtained.
- the effect of reducing the pressure loss of the light quality two-cam structure can be obtained.
- particles having a high degree of circularity are preferable in that they are stably present up to a high temperature during firing and the pore diameter can be easily controlled. If the circularity of the first alumina source material is less than 0.70, pore openings are not formed so much on the partition wall surface, and the effect of reducing pressure loss cannot be obtained. If the circularity of the first alumina source material is less than 0.80, the effect of reducing pressure loss may be reduced.
- the higher the degree of circularity of the first alumina source material the better.
- the maximum circularity of the first alumina source material is preferably 0.90.
- the circularity of the first anoremina source material is 0.70-0.90. 80 to 0.90 is more preferable, and 0.85 to 90 is particularly preferable.
- a method for obtaining particles having a circularity as described above a method of heat-treating predetermined alumina source material particles at a temperature equal to or higher than the melting point thereof may be mentioned.
- predetermined alumina source raw material particles By heat-treating predetermined alumina source raw material particles at a temperature equal to or higher than their melting point, spherical particles (first alumina source raw material) having a melted surface and few edge portions can be obtained.
- the melting point of alumina is 2050 ° C, it can be easily spheroidized by a method such as heat treatment in a flame of 2050 ° C or higher, and the circularity is 0.70 or higher (ie, 0.70 ⁇ : L 00) first alumina source raw material particles can be easily obtained.
- the temperature during the heat treatment is preferably from the melting point of the target substance to 300 ° C higher than the melting point. For this reason, when the alumina source raw material particles are subjected to the above heat treatment, it is preferable to perform the heat treatment in a flame at 2050 to 2350 ° C.
- a method of pulverizing predetermined alumina source raw material particles with a jet stream can also be suitably used.
- Predetermined alumina source material particles are pulverized by a jet stream.
- the surface of the predetermined alumina source raw material particles is worn, and spherical particles with few edge portions can be obtained.
- a device such as a jet mill
- a predetermined alumina source material particle is pressurized and injected from a nozzle together with a high-pressure gas such as air or nitrogen, and the friction or collision of the predetermined alumina source material particle itself is used.
- a method of pulverizing is used.
- the above-mentioned first alumina source material is 10% by mass or more with respect to the total mass of the cordierite koji raw material (that is, 10- 100 mass%)
- the first alumina source material is added to the total mass of the cordierite rice bran raw material. It is preferable to add 15% by mass or more (that is, 15 to: L00% by mass). It is particularly preferable to add 20% or more (that is, 20 to: L00% by mass).
- the first alumina source material is less than 10% by mass with respect to the total mass of the cordierite rice bran raw material, the first alumina source material is too small, and the effect of reducing the pressure loss is sufficient. Can't get the first alumina source material
- the alumina source material there is a particle that is preferably not spheroidized! /.
- a particle that is preferably not spheroidized! /.
- kaolin and the like it may be preferable not to spheroidize. This is because when a honeycomb-shaped formed body is obtained by extrusion molding from a die having a shape complementary to the partition to be formed, talc or kaolin linker, which is a plate-like crystal, or a slit in the die is formed. This is because the film is oriented when it passes through, so that the cordierite nodule-cam structure finally obtained has a preferable effect of reducing the thermal expansion.
- the upper limit of the first alumina source material is preferably 33% by mass. That is, when considering the preferable upper limit of the first alumina source material, it is preferable to add 10 to 33% by mass of the first alumina source material with respect to the total mass of the cordierite rice bran raw material. It is particularly preferable to add 20 to 33% by mass.
- the average particle size of the first alumina source raw material used in the method for producing the cordierite-like nodule-cam structure of the present embodiment is 1 to: force 1 to 5 / ⁇ that is LO / zm. ⁇ is preferred and 2 to 5 m is particularly preferred.
- the first alumina source raw material spherical particles with such an average particle size are very suitable as aggregate particles for cordierite rice bran raw material. In addition, by arranging these particles, it is possible to satisfactorily form a space that becomes the pore opening of the porous body.
- the first alumina source material is particles having a particle diameter of 5 ⁇ m or more (that is, the first alumina source source to be used). All particles having a particle diameter of 5 ⁇ m or more in the material) are contained in an amount of 10% by mass or more (that is, 10 to: L00% by mass) with respect to the total mass of the first alumina source material. More preferably, it is more preferably 10 to 76% by mass.
- alumina source materials with a particle size of 5 ⁇ m or more are suitable as aggregates and pore openings.
- the material for forming the space is also particularly suitable.
- the maximum particle size of the first alumina source raw material to be used is 300 m.
- the particles having a particle size of 5 to 300 ⁇ m are contained 10 to L00% by mass with respect to the total mass of the first alumina source material.
- the maximum particle size of the first alumina source material to be used is 300 ⁇ m, and 10 to 100% by mass of particles having a particle size of 5 to 300 ⁇ m is contained, while maintaining the above-mentioned effects, the quality It is possible to produce cordierite-like hard structure having excellent properties.
- the clay for forming the cordierite noble-cam structure becomes more homogeneous, and extrusion molding of the hard cam compact Is also easier.
- the maximum particle size of the first alumina source material used in this way is 300 ⁇ m
- particles having a particle size of 5 to 300 ⁇ m are added to the total mass of the first alumina source material. It is more preferable to include 10 to 76% by mass, because, as described above, in the first alumina source material, there are also particles that are preferably not subjected to the spherical soot treatment. Particles having a particle size of 5 m or more and particles having a particle size of 5 to 300 ⁇ m can be obtained, for example, by passing through a sieve having an opening corresponding to the particle size. .
- silica source material particles such as silica, a composite oxide containing silica, or a substance that can be converted into silica by firing can be used.
- silica Si 0
- silica such as quartz, kaolin (AI O -2SiO ⁇ 2 ⁇ ⁇ ), talc (3MgO '4SiO ⁇ HO), or mullite ( 3A1 O -2SiO) and the like.
- the particles as the silica source material may contain sodium oxide (Na 0), potassium oxide (K 2 O), and the like as impurities. However, increase in thermal expansion coefficient
- the ratio of the total mass of the impurities to the total mass of the silica source raw material particles is 0.01 mass% or less (that is, 0 to 0.01 mass%).
- the kaolin particles may contain mica, quartz and the like as impurities.
- the ratio of the total mass of the impurities to the total mass of the kaolin particles is 2% by mass or less (that is, 0 to 2% by mass). preferable.
- the average particle diameter of the silica source raw material particles is not particularly limited, but is 5 to 50 ⁇ m for quartz particles, 2 to 10 ⁇ m for kaolin particles, 5 to 40 ⁇ m for talc particles, In the case of mullite particles, particles of about 2 to 20 ⁇ m are preferably used.
- the magnesia source material may be particles such as magnesia, a composite oxide containing magnesia, or a substance that is converted to magnesia by firing.
- particles such as talc or magnesite (MgCO 3), among which talc particles are preferable.
- magnesia source particles include impurities such as iron oxide (Fe 2 O 3), acid calcium (CaO), sodium oxide (Na 2 O), potassium oxide (K
- the mass ratio of iron oxide to the total mass of the magnesia source material particles is 0.1-2.
- the ratio of the total mass of calcium oxide, sodium oxide, and potassium oxide to the total mass of the magnesia source raw material particles is preferably 0.35 mass% or less (ie, 0 to 0). 35% by mass).
- the average particle size of the magnesia source raw material particles is not particularly limited, but if it is talc particles,
- the silica source raw material particles and the magnesia source raw material particles may be spheroidized by the same method (heating treatment or pulverization by a jet stream) as the alumina source raw material particles described above.
- the dispersion medium added to the cordierite rice bran raw material include water or a mixed solvent of water and an organic solvent such as alcohol, and water is particularly preferably used.
- additives such as a pore former, an organic binder, and a dispersant are further added to prepare the obtained clay. Also good.
- the pore-forming material is an additive for obtaining a cordierite nodule-cam structure having a high porosity by increasing the porosity by burning out and forming pores when the molded body is fired. It is.
- the pore former must be a combustible substance that burns away when the molded body is fired.
- carbon such as graphite, wheat flour, starch, phenol resin, polymethyl methacrylate, polyethylene, or polyethylene Forces including terephthalate and the like
- Microcapsules made of organic resin such as acrylic resin can be particularly preferably used.
- a high-porosity honeycomb structure can be obtained with a small amount of addition that has a high pore-forming effect per unit mass, and thermal stress that generates less heat during firing is generated. There is an advantage that can be reduced.
- the organic binder imparts fluidity to the clay at the time of molding, becomes a gel in the Hercum dried body before firing, and serves as a reinforcing agent that maintains the mechanical strength of the dried body. It is an additive. Therefore, as the binder, for example, hydroxypropylmethylcellulose, methenoresenorelose, hydroxyethinoresenorelose, strong levoxino retinorenorose, polyhydric alcohol and the like can be suitably used.
- the dispersant is an additive for promoting the dispersion of each particle or the like constituting the cordierite raw material into a dispersion medium and obtaining a homogeneous clay. Therefore, as the dispersing agent, a substance having a surface active effect, such as ethylene glycol, dextrin, fatty acid sarcophagus, and polar coll can be preferably used.
- the cordierite kite raw material and the dispersion medium are mixed and kneaded in accordance with a known mixing and kneading method.
- the mixing is performed by a method in which a stirring blade is rotated at a high speed of 500 rpm or more (preferably lOOO rpm or more) and a stirring device is used while stirring and applying a shear force. It is preferable.
- a stirring blade is rotated at a high speed of 500 rpm or more (preferably lOOO rpm or more) and a stirring device is used while stirring and applying a shear force. It is preferable.
- the upper limit of the rotational speed in the above apparatus is currently about lOOOOrpm. That is, in the present invention, the rotational speed of the stirring blade is preferably 500 to 10,000 rpm, and more preferably 1000 to 5 OOOrpm.
- the mixing can be performed by a conventionally known mixer such as a sigma-kinder or a ribbon mixer.
- the kneading can be carried out by a conventionally known kneader, for example, a sigma kinder, a banner mixer, a screw type extrusion kneader or the like.
- a kneading machine such as a vacuum vacuum kneader or a biaxial continuous kneading extrusion molding machine
- a vacuum decompression device for example, a vacuum pump
- the kneaded material obtained in this way is extruded to obtain a honeycomb formed body in which a plurality of cells are partitioned by partition walls.
- the method of extrusion molding is not particularly limited, and a method of extrusion molding using a die having a desired cell shape, partition wall thickness, and cell density can be suitably used.
- the obtained two-cam molded body is dried to obtain a Hercam dry body.
- the drying method is not particularly limited, and a conventionally known drying method such as hot air drying, microwave drying, dielectric drying, reduced pressure drying, vacuum drying, freeze drying, or the like can be used.
- a drying method combining hot air drying with microwave drying or dielectric drying is preferred because it can be uniformly dried.
- the obtained knob-cam dried body is fired to produce a cordierite nose-cam structure.
- This firing means an operation for sintering and densifying each raw material particle (alumina source raw material particle, silica source raw material particle, and magnesia source raw material particle) to ensure a predetermined strength.
- the firing conditions temperature 'time
- an appropriate condition may be selected according to the type. For example, baking at a temperature of 1410 to 1440 ° C. for 3 to 10 hours is preferable.
- the firing condition (temperature 'time) is less than the above range, cordierite crystallization of the aggregate raw material particles may be insufficient. This is not preferable in that cordierite may melt.
- an operation (calcination) for burning and removing organic substances (pore-forming material, organic binder, dispersant, etc.) in the dried Hercum is performed before firing or in the temperature raising process of firing. And I like it because it can promote the removal of organic matter more.
- the burning temperature of the organic binder is about 200 ° C
- the burning temperature of the pore former is about 300 to 1000 ° C
- the calcining temperature should be about 200 to: LOOO ° C.
- the calcining time is not particularly limited, but is usually about 10 to 100 hours.
- the cordierite nodule-cam structure manufactured in this way has more pore openings formed on the surface of the partition wall than the conventional her cam structure, so that the pressure loss is reduced. It has been. In particular, even if the composition and porosity are maintained, the pressure loss is reduced, so that it is excellent in impact resistance and heat resistance.
- the obtained cordierite nodule-cam structure is not particularly limited in terms of its pore diameter (sometimes referred to as pore diameter), porosity, etc. Is preferably 10 to 40 ⁇ m, more preferably 15 to 30 ⁇ m. Further, the porosity is preferably 40 to 70%, more preferably 50 to 65%.
- the pore diameter described above is a value obtained by a mercury intrusion method, and can be measured, for example, by a mercury intrusion porosimeter.
- the porosity described above is the total pore volume V of the porous material obtained by the mercury intrusion method described above and the true specific gravity d of the constituent material of the porous material d (2.52 gZcm in the case of cordierite). From 3 ), it means the porosity P calculated based on the following formula (2).
- the obtained cordierite noble-cam structure is used as a dust collecting filter, it is plugged differently between one opening and the other opening of the cell. A plugging portion is further provided.
- the method for forming the plugging portion for example, an adhesive sheet is attached to one end face of the cordierite-type hard cam structure, and image processing is performed. Drill holes only in the part of the adhesive sheet corresponding to the cells to be plugged by using laser Then, the end face of the cordierite-like noble-cam structure with the mask attached is dipped in the ceramic slurry, and the cordierite-like noble-cam structure is sealed with the ceramic to the cells to be plugged.
- a plugging portion is formed by filling a rally, and the same process is performed on the other end face of the cordierite-type two-cam structure, and then the plugging portion is dried and fired. Can be mentioned.
- the plugged portion may be formed into a two-cam ceramic dried body, and the ceramic dried body and the plugged portion may be fired simultaneously.
- the ceramic slurry can be prepared by mixing at least raw material particles (aggregate raw material particles) as an aggregate and a dispersion medium (eg, water). Further, if necessary, additives such as a binder and a dispersant may be added.
- a binder it is preferable to use a resin such as polybutyl alcohol or methylcellulose, and as the dispersant, a special carboxylic acid type polymer surfactant is used.
- the viscosity of the ceramic slurry is preferably adjusted in the range of 5 to 50 Pa's, more preferably in the range of 10 to 3 OPa's. If the viscosity of the ceramic slurry is too low, sink defects tend to occur.
- the viscosity of the slurry can be adjusted by, for example, the ratio of the aggregate raw material particles and the dispersion medium (for example, water) or the amount of the dispersant.
- the cordierite nodule-cam structure is a cordierite type nodule-cam structure further provided with a plugging portion that plugs one cell opening portion and the other opening portion.
- a two-cam structure (no two-cam filter) was manufactured. The specific manufacturing process, or not a, talc (average particle size 21 m, circularity 0.72) 42 wt%, kaolin (average particle diameter 11 m, circularity 0.68) 20 mass 0/0, alumina A (average particle size 2.4 / ⁇ ⁇ , circularity 0.71) 25% by mass, silica (average particle size 25 m, circularity 0.84) 13% by mass, mixed with cordierite raw material was prepared.
- alumina A is the first alumina source material.
- the largest particles The first alumina source material was sieved and the separated material was used so that the particle diameter of the particles was 300 ⁇ m or less.
- the obtained kneaded material is put into a vacuum kneader and kneaded to produce a cylindrical kneaded material, and the kneaded material is put into an extrusion molding machine, and a plurality of cells are formed by partition walls.
- a honeycomb formed body was obtained by forming into a honeycomb-shaped section.
- the obtained honeycomb formed body was subjected to induction drying and then completely dried by hot air drying, and both end surfaces were cut into predetermined dimensions to obtain a honeycomb dried body.
- one of the cells of the obtained nonicum dried body and the other opening are filled with a slurry having the same composition as the cordierite rice bran raw material described above and having the same cordierite rice bran raw material strength. And plugged.
- Particles (alumina A) as the alumina source material constituting the cordierite rice bran raw material used in this example (alumina A) circularity, average particle diameter m), particle diameter of 5 ⁇ m or more (maximum particle Since the diameter is 300 ⁇ m, the proportion of particles (substantially 5 to 300 ⁇ m) is included in the total mass of the particles (hereinafter referred to as “a proportion of 5 ⁇ m or more (mass%)”).
- Table 1 shows the percentage (hereinafter referred to as “content ratio (mass%)”) in which the particles as the alumina source material are contained with respect to the total mass of the cordierite forming raw material.
- the ratio of the area of the pore opening formed on the surface of the partition wall to the total area when the surface of the partition wall is flat (hereinafter referred to as "the pore size”).
- Open area ratio (%) pressure loss (KPa), compressive strength (MPa), porosity (%), pore diameter m), and coefficient of thermal expansion (X 10V ° O)
- KPa pressure loss
- MPa compressive strength
- porosity %
- pore diameter m coefficient of thermal expansion
- the compressive strength of the resulting Hercam filter was obtained by penetrating the resulting Hercam filter into a circular shape with an end face of 25.4 mm and a length of 25.4 mm, and extending in the length direction. was the measured value.
- a hard cam filter using a cordierite hard cam structure was obtained in the same manner as in Example 1 except that alumina B to F shown in Table 1 were used instead of alumina A.
- alumina B to F shown in Table 1 were used instead of alumina A.
- the ratio of the pore opening area (%), pressure loss (KPa), compressive strength (MPa), porosity (%), pore diameter (m), and thermal expansion coefficient (X) The measurement results are shown in Table 1.
- the measurement methods are the same as in Example 1.
- the largest particles of alumina B to F The raw material obtained by sieving the alumina source raw material was used so that the particle diameter of the particle was 300 m or less.
- a cordierite knot-cam structure was used in the same manner as in Example 1 except that 10% by mass of alumina C and 15% by mass of alumina G described in Table 1 were used instead of alumina A. Obtained a two-cam filter, and in the resulting her cam filter, the pore area ratio (%), pressure loss (KPa), compressive strength (MPa), porosity (%), and pore diameter m ) And heat The expansion coefficient (x io— b Z ° c) was measured. Table 1 shows the measurement results. Each measurement method is the same as in Example 1. In this embodiment, alumina C is the first alumina source material.
- a hard cam filter using a cordierite hard cam structure was obtained in the same manner as in Example 1 except that alumina H shown in Table 1 was used instead of alumina A.
- alumina H shown in Table 1 was used instead of alumina A.
- the ratio (%) of pore opening area, pressure loss (KPa), compression strength (MPa), porosity (%), pore diameter m), and thermal expansion coefficient (X 10 “V ° C.” was measured.
- the measurement results are shown in Table 1.
- the measurement methods are the same as in Example 1.
- Example 1 In the same manner as in Example 1 except that 5% by mass of alumina C and 20% by mass of alumina G shown in Table 1 were used in place of alumina A, a cordierite no-cam structure was used. A cam filter was obtained, and in the resulting Hercam filter, the ratio of the opening area of the pores (%), pressure loss (KPa), compressive strength (MPa), porosity (%), and pore diameter m) The thermal expansion coefficient (XIO— 6 Z ° C) was measured. Table 1 shows the measurement results. Each measuring method is the same as in Example 1. For alumina H and alumina G, raw materials obtained by sieving and separating the alumina source material were used so that the largest particle size would be 300 m or less.
- cordierite rice bran raw material was talc (average particle size 21 m, circularity 0.72) 37% by mass, kaolin (average particle size 11 m, circularity 0.68) 19% by mass, water Prepared by mixing aluminum oxide A (average particle size 2.8 / ⁇ ⁇ , circularity 0.72) 33% by mass, silica (average particle size 25 111, circularity 0.84) 11% by mass.
- a nodule-cam filter using a cordierite nodule-cam structure was obtained in the same manner as in Example 1, and in the obtained honeycomb filter, the ratio (%) of pore opening area and pressure loss ( KPa), compressive strength (MPa), porosity (%), pore diameter m), and coefficient of thermal expansion (X 10V ° O) are shown in Table 1.
- KPa pore opening area and pressure loss
- MPa compressive strength
- porosity %
- pore diameter m pore diameter
- X 10V ° O coefficient of thermal expansion
- Table 1 For each measurement method The same as in Example 1.
- hydroxyaluminum A is the first alumina source material.
- aluminum hydroxide A a raw material obtained by sieving the alumina source raw material so that the particle size of the largest particle was 300 ⁇ m or less was used.
- the ratio of the pore opening area (%), pressure loss (KPa), compressive strength (MPa), porosity (%), and pore diameter m) was measured and a thermal expansion coefficient (X 1 0- 6 Z ° C ). Table 1 shows the measurement results. Each measurement method is the same as in Example 1.
- Talc (average particle size 21 m, circularity 0.72) 42 wt%, respectively of the force Orin (kaolin A through C) 20 Weight 0/0 according to Table 2, alumina (average particle diameter 4. 5 / ⁇ ⁇ Example 1 except that a cordierite raw material was prepared by mixing at a ratio of circularity 0.65) 25% by mass and silica (average particle size 25 m, circularity 0.84) 13% by mass. Similarly, a Hercam filter using a cordierite hard cam structure was obtained.
- Example 9 Kaolin A 0.72 4.8 43 20 31 5.5 2.0 62 21 0.5
- Example 10 Kaolin B 0.81 4.7 41 20 34 5.2 2.0 63 21 0.6
- Example 11 Kasai phosphorus C 0.88 4.5 38 20 39 4.9 2.0 63 22 0.7
- Comparative Example 4 Kaolin D 0.61 4.9 47 20 20 6.3 2.0 62 20 0.4
- a hard cam filter using a cordierite-like knob-cam structure was obtained in the same manner as in Example 9 except that kaolin D shown in Table 2 was used instead of kaolin A.
- the pore area ratio (%), pressure loss (KPa), compressive strength (MPa), porosity (%), pore diameter m), and thermal expansion coefficient (X 10 "V The measurement results are shown in Table 2. The measurement methods are the same as in Example 1.
- Example 1 ⁇ The nozzle-cam filter obtained by L1 had a high ratio of pore opening area, and its pressure loss was low.
- Comparative Example 1 since the average particle diameter of alumina H having a circularity of 0.9 was too small, 0.5 m, adjacent particles were packed and arranged, and the obtained no-cam In the filter, the pressure loss was high as the ratio of the pore opening area was low.
- Comparative Example 2 the content ratio of the alumina C having a circularity of 0.9 was as low as 5% by mass, so that the effect of reducing the pressure loss could not be obtained.
- Comparative Example 3 and Comparative Example 4 as well, the circularity of hydroxyaluminum A is small at 0.62, and the circularity of kaolin D is small at 0.61, so the ratio of pore opening area is low. Pressure loss was getting higher.
- the Hercam filters obtained in the example and the comparative example showed no significant difference in the porosity and the pore diameter, and the pressure was maintained even while maintaining these characteristics. It has been found that loss can be reduced.
- the No-cam filter obtained in Example 6 has a large average particle diameter of alumina F of 9 m, and the cordierite-forming reactivity is slightly reduced. Therefore, the thermal expansion coefficient is 0.9 X and summer somewhat larger and 10- 6 / ° C. Although the ratio of the open area of the pores is large and the pressure loss is low, the thermal shock resistance may be inferior.
- the average particle size of the alumina source material is preferably 1 to 5 / zm.
- the method for producing a cordierite hard cam structure of the present invention it is possible to obtain a cordierite hard cam structure with reduced pressure loss that is preferably used as a filter or the like. Further, the cordierite-like two-cam structure obtained can be used as a suitable catalyst carrier because a catalyst or the like is easily carried on the surface of the partition wall.
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Abstract
Description
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Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05785604A EP1798209B1 (en) | 2004-09-24 | 2005-09-22 | Method for producing cordierite-based honeycomb structure |
| US11/660,674 US8591800B2 (en) | 2004-09-24 | 2005-09-22 | Method for producing cordierite-based honeycomb structure |
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| JP2004276765A JP4361449B2 (ja) | 2004-09-24 | 2004-09-24 | コーディエライト質ハニカム構造体の製造方法 |
| JP2004-276765 | 2004-09-24 |
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| WO2006033392A1 true WO2006033392A1 (ja) | 2006-03-30 |
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| US (1) | US8591800B2 (ja) |
| EP (1) | EP1798209B1 (ja) |
| JP (1) | JP4361449B2 (ja) |
| CN (2) | CN101027263A (ja) |
| WO (1) | WO2006033392A1 (ja) |
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| ES2364260A1 (es) * | 2009-11-26 | 2011-08-30 | Geolica Innovations, S.L. | Electro-generador asíncrono. |
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| US8242038B2 (en) * | 2007-10-31 | 2012-08-14 | Corning Incorporated | Low thermal expansion high strength honeycomb cement and method therefor |
| JP4480758B2 (ja) * | 2007-12-27 | 2010-06-16 | 日本碍子株式会社 | 耐火モルタル硬化成形物 |
| JP5351524B2 (ja) * | 2008-10-14 | 2013-11-27 | 日本碍子株式会社 | ハニカム構造体 |
| KR101770654B1 (ko) * | 2009-09-04 | 2017-08-23 | 히타치 긴조쿠 가부시키가이샤 | 세라믹 허니컴 구조체 및 그 제조 방법 |
| US9565966B2 (en) * | 2010-10-28 | 2017-02-14 | Voice Systems Technology, Inc. | Coffee filter qualification apparatus and methodology |
| JP5643692B2 (ja) * | 2011-03-25 | 2014-12-17 | 日本碍子株式会社 | ハニカムフィルタ及びその製造方法 |
| US9346003B2 (en) | 2011-09-15 | 2016-05-24 | Ngk Insulators, Ltd. | Honeycomb structure |
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| CN105413314B (zh) * | 2015-11-06 | 2017-04-05 | 中国第一汽车股份有限公司 | 颗粒过滤器的高活性材料的制备方法 |
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| KR20230152676A (ko) * | 2021-03-05 | 2023-11-03 | 에이지씨 가부시키가이샤 | 근청석질 소결체 및 그 제조 방법 |
| JP7628453B2 (ja) * | 2021-03-30 | 2025-02-10 | 日本碍子株式会社 | ハニカム構造体 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60226416A (ja) * | 1984-04-24 | 1985-11-11 | Kanto Kagaku Kk | 多孔性コ−ジライトセラミツクス |
| JPH06172023A (ja) * | 1992-12-09 | 1994-06-21 | Chichibu Cement Co Ltd | コーディエライト粉末及びその磁器の製造方法 |
| JPH07196363A (ja) * | 1993-12-28 | 1995-08-01 | Sumitomo Osaka Cement Co Ltd | 易焼成コーディエライト組成物 |
| JPH09227223A (ja) * | 1996-02-21 | 1997-09-02 | Sumikin Hoton Ceramics Kk | 快削性複合セラミックスの製造法 |
| WO2001058827A1 (en) * | 2000-02-14 | 2001-08-16 | Ngk Insulators, Ltd. | Method for producing honeycomb ceramic structure |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US468317A (en) | 1892-02-02 | Washing-machine | ||
| US2710701A (en) | 1952-02-12 | 1955-06-14 | James E Hale | Safety cap |
| JPS55100269A (en) * | 1979-01-25 | 1980-07-31 | Ngk Insulators Ltd | Production of cordierite type ceramic honeycomb structure |
| JPS5749009A (en) * | 1980-09-09 | 1982-03-20 | Toyota Motor Corp | Exhaust gas filter for internal combustion engine |
| JPS60141668A (ja) * | 1983-12-28 | 1985-07-26 | 日本碍子株式会社 | セラミックハニカム構造体を接合若しくはコーティングまたは封着するためのセラミック材料組成物 |
| JPS61256965A (ja) | 1985-05-10 | 1986-11-14 | 日本碍子株式会社 | コ−ジエライトセラミツクスの製造法 |
| JPS61263628A (ja) * | 1985-05-17 | 1986-11-21 | Mitsubishi Mining & Cement Co Ltd | セラミツクスマイクロ球の製造方法 |
| IT1186728B (it) * | 1985-06-04 | 1987-12-16 | Montedison Spa | Ossidi misti di allumina e zirconia sotto forma di particelle sferiche ed aventi distribuzione granulometrica ristretta e processo per la loro preparazione |
| JPH0421654Y2 (ja) | 1986-07-14 | 1992-05-18 | ||
| CN1123379C (zh) * | 2000-06-27 | 2003-10-08 | 中国科学院上海硅酸盐研究所 | 一种球形氧化铝颗粒的制备方法 |
| JP2003040687A (ja) | 2000-06-30 | 2003-02-13 | Ngk Insulators Ltd | ハニカムセラミックス構造体とその製造方法 |
| CN100467383C (zh) * | 2001-07-27 | 2009-03-11 | Tdk株式会社 | 球状氧化物粉末的制造方法及球状粉末制造装置 |
| WO2003014041A2 (en) | 2001-08-08 | 2003-02-20 | Showa Denko K.K. | $g(a)-alumina for cordierite ceramics, production method of the $g(a)-alumina and structures of cordierite ceramics using the $g(a)-alumina |
| JP2003176127A (ja) | 2001-08-08 | 2003-06-24 | Showa Denko Kk | コージエライトセラミックス用α−アルミナ、該α−アルミナの製造方法及び該α−アルミナを用いた構造物 |
| DE60315076T3 (de) * | 2002-12-09 | 2015-03-05 | Kao Corp. | Kugelgusssand |
| JP4441173B2 (ja) * | 2002-12-26 | 2010-03-31 | 日本碍子株式会社 | セラミックス構造体の製造方法 |
-
2004
- 2004-09-24 JP JP2004276765A patent/JP4361449B2/ja not_active Expired - Fee Related
-
2005
- 2005-09-22 CN CNA2005800319660A patent/CN101027263A/zh active Pending
- 2005-09-22 US US11/660,674 patent/US8591800B2/en not_active Expired - Fee Related
- 2005-09-22 EP EP05785604A patent/EP1798209B1/en not_active Ceased
- 2005-09-22 CN CN201310636826.2A patent/CN103693948B/zh not_active Expired - Fee Related
- 2005-09-22 WO PCT/JP2005/017483 patent/WO2006033392A1/ja not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60226416A (ja) * | 1984-04-24 | 1985-11-11 | Kanto Kagaku Kk | 多孔性コ−ジライトセラミツクス |
| JPH06172023A (ja) * | 1992-12-09 | 1994-06-21 | Chichibu Cement Co Ltd | コーディエライト粉末及びその磁器の製造方法 |
| JPH07196363A (ja) * | 1993-12-28 | 1995-08-01 | Sumitomo Osaka Cement Co Ltd | 易焼成コーディエライト組成物 |
| JPH09227223A (ja) * | 1996-02-21 | 1997-09-02 | Sumikin Hoton Ceramics Kk | 快削性複合セラミックスの製造法 |
| WO2001058827A1 (en) * | 2000-02-14 | 2001-08-16 | Ngk Insulators, Ltd. | Method for producing honeycomb ceramic structure |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP1798209A4 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2364260A1 (es) * | 2009-11-26 | 2011-08-30 | Geolica Innovations, S.L. | Electro-generador asíncrono. |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1798209A4 (en) | 2010-09-15 |
| JP4361449B2 (ja) | 2009-11-11 |
| US8591800B2 (en) | 2013-11-26 |
| CN103693948B (zh) | 2016-01-20 |
| CN103693948A (zh) | 2014-04-02 |
| CN101027263A (zh) | 2007-08-29 |
| EP1798209B1 (en) | 2011-11-23 |
| JP2006089329A (ja) | 2006-04-06 |
| US20070259153A1 (en) | 2007-11-08 |
| EP1798209A1 (en) | 2007-06-20 |
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