WO2008041548A1 - Procédé de fabrication d'une structure de céramique en nid d'abeilles - Google Patents
Procédé de fabrication d'une structure de céramique en nid d'abeilles Download PDFInfo
- Publication number
- WO2008041548A1 WO2008041548A1 PCT/JP2007/068548 JP2007068548W WO2008041548A1 WO 2008041548 A1 WO2008041548 A1 WO 2008041548A1 JP 2007068548 W JP2007068548 W JP 2007068548W WO 2008041548 A1 WO2008041548 A1 WO 2008041548A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- microcapsules
- honeycomb structure
- bulk density
- pore volume
- microcapsule
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0006—Honeycomb structures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B35/10—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 aluminium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B35/185—Mullite 3Al2O3-2SiO2
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B35/195—Alkaline earth aluminosilicates, e.g. cordierite or anorthite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B35/46—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 titanium oxides or titanates
- C04B35/462—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 titanium oxides or titanates based on titanates
- C04B35/478—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 titanium oxides or titanates based on titanates based on aluminium titanates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/581—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on aluminium nitride
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00129—Extrudable mixtures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00198—Characterisation or quantities of the compositions or their ingredients expressed as mathematical formulae or equations
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00793—Uses not provided for elsewhere in C04B2111/00 as filters or diaphragms
Definitions
- the present invention relates to a method for manufacturing a ceramic honeycomb structure constituting a honeycomb filter or the like for purifying exhaust gas.
- Diesel engine exhaust gas contains particulates (particulate matter), which are mainly composed of carbon (eg, soot) and high-boiling hydrocarbons. May cause adverse effects.
- a ceramic honeycomb filter hereinafter referred to as “no, two-cam filter”
- the honeycomb filter 10 includes a ceramic honeycomb structure 11 composed of a porous partition wall 2 and a peripheral wall 1 forming a large number of flow paths 3 and 4, and both end faces 8, 8 of the flow paths 3 and 4. It consists of sealing parts 6a and 6b that seal 9 in a checkered pattern alternately.
- the exhaust gas flows in from the outflow side sealed flow path 3, passes through the partition wall 2, and is discharged from the inflow side sealed flow path 4.
- the exhaust gas passes through the pores provided in the partition wall surface and inside, the particulate matter is trapped in the partition wall surface and pores.
- the pore size is large, the pressure loss when exhaust gas passes through the honeycomb filter is small, but the collection rate of the particulate matter is deteriorated.
- the pore size is small V, the collection rate is improved, but the pressure loss increases. Further, if the total volume of the pores is too small, the pressure loss increases, and if it is too large, the strength of the honeycomb filter decreases.
- pore-forming material such as coal powder and wheat flour added to the raw material powder is adjusted, and the size and volume of the pores are controlled according to the intended use.
- microcapsules which are hollow resins containing gas as described in JP-A-2003-38919, have come to be used as pore formers.
- the properties of the microcapsules may vary depending on the production lot, even if the same amount of microcapsules is added to the ceramic powder when the honeycomb structure is manufactured, the microcapsules to be used If the production lot is different, the honeycomb after firing If the pore volume of the structure (hereinafter, the pore volume of the honeycomb structure after firing is simply referred to as V) is changed, there is a problem!
- WO2005 / 068398 describes a stable pore volume even when using microcapsules stored for a long period of time by regulating the weight of gas contained in microcapsules stored for 4 weeks in an environment of 40 ° C. Discloses a method for obtaining the honeycomb structure.
- the microcapsules actually used need to be stored for 4 weeks in an environment of 40 ° C, and a preliminary test must be performed. In that case, it was difficult to grasp the appropriate amount of pore former added in a short time. For this reason, there are problems such as not being able to cope with sudden changes in production, and costly storage of microcapsules!
- JP-A-2005-314218 discloses a method of collecting a portion of an extruded raw material of a honeycomb structure every time a raw material lot is changed and extruding it, and measuring the pore characteristics after firing of the molded body to A method for producing a porous structure having stable pore characteristics by adjusting the amount of pore-forming material added to the raw material and water after grasping the variation in advance is disclosed. Since the method described in JP-A-2005-314218 requires enormous time for molding, firing and evaluation, it is difficult to grasp the appropriate amount of pore-forming material in a short time, and the production cost There was a problem of power.
- the object of the present invention is to adjust the amount of the appropriate pore-forming material in a short time even if the properties of the microcapsules change, and to reduce the honeycomb structure having a stable pore volume.
- the object is to provide a production method that can be obtained at low cost.
- the present inventors have found that there is a strong correlation between the filling bulk density of the microcapsules and the pore volume of the honeycomb structure. It has been found that an appropriate amount of added calories of microcapsules for obtaining a honeycomb structure having a desired pore volume can be grasped!
- the method of the present invention for producing a ceramic honeycomb structure is obtained by mixing and kneading a powder containing a pore former made of a ceramic raw material and microcapsules to form a clay, and extruding the clay.
- Another method of the present invention for producing a ceramic honeycomb structure includes mixing and kneading a powder containing a pore former made of a ceramic raw material and a microcapsule to form a clay, and extruding the clay.
- the honeycomb formed body obtained by drying and firing is manufactured by adding Ml (mass%) of microcapsules A having a filling bulk density of Ql (g m 3 ) to the ceramic raw material.
- the added amount M2 (mass%) of microcapsule B having a filling bulk density of Q2 (g m 3 ) with respect to the ceramic raw material ) Is adjusted to be ⁇ 2> ⁇ 1 when 01> 02, or M2 and Ml when Q1 ⁇ Q2.
- Still another method of the present invention for manufacturing a ceramic honeycomb structure is to mix and knead a powder containing a ceramic raw material and a pore-forming material composed of microcapsules to form a clay, and then extrude the clay.
- a method of drying and firing a honeycomb formed body obtained by forming, the relationship between the filling bulk density of the microcapsules and the pore volume of the ceramic honeycomb structure, and the addition amount of the microcapsules and the ceramic honeycomb structure
- a ceramic honeycomb structure having a desired pore volume is obtained by determining the addition amount of the microcapsules according to the filling bulk density from the relationship with the pore volume of the body.
- Yet another method of the present invention for producing a ceramic honeycomb structure is to mix and knead a powder containing a ceramic raw material and a pore former composed of microcapsules to form a clay, and then extrude the clay.
- Yet another method of the present invention for producing a ceramic honeycomb structure includes a ceramic raw material and A powder containing a pore-forming material comprising microcapsules is mixed and kneaded to form a clay, and a honeycomb formed body obtained by extruding the clay is dried and fired.
- the packing bulk density when the compressive force is 0.13 MPa is 0.13 to 0.17 gm 3 .
- the specific surface area of the microcapsules is preferably 0 ⁇ 058 to 0 ⁇ 218 m 2 / ml.
- FIG. 1 is a schematic cross-sectional view showing an example of a ceramic honeycomb filter.
- FIG. 2 is a schematic diagram for explaining a method for measuring a filling bulk density.
- FIG. 3 is a graph showing the relationship between the filling density of microcapsules and the pore volume of honeycomb structures.
- FIG. 4 is a graph showing the relationship between the amount of microcapsules added and the pore volume of the honeycomb structure.
- the present invention is a method for manufacturing a ceramic honeycomb structure, characterized in that the addition amount of microcapsules is adjusted in accordance with the size of the filled bulk density of the microcapsules, which has a strong correlation with the pore volume.
- a ceramic honeycomb structure can be obtained in which fluctuations in pore volume between production lots are suppressed to be smaller than in the case of manufacturing by adding a certain amount of microcapsules to ceramic powder as in the past. .
- Force S The amount of microcapsules added in a short time can be adjusted by the method of the present invention.
- a honeycomb structure having a stable pore volume can be obtained.
- the present inventor believes that the true volume per unit mass of the microcapsule changes due to the difference in pore volume of the resulting honeycomb structure even if the added mass of the microcapsule is the same.
- the idea was to measure the bulk density of the packing in order to grasp the volume.
- the present inventor initially assumed that the larger the true volume of the microcapsule, the smaller the filling bulk density and the larger the pore volume. It has been found that the pore volume increases.
- honeycomb structure with desired pore volume cannot be obtained. Therefore, when microcapsules with a small filling bulk density are used, a honeycomb structure having a desired pore volume can be obtained by increasing the amount added, and conversely, when microcapsules with a large filling bulk density are used. By reducing the addition amount, a honeycomb structure having a desired pore volume can be obtained.
- the reason why the pore volume of the obtained honeycomb structure increases as the filling bulk density of the microcapsules used increases is not necessarily clear, but is considered as follows.
- a large filling bulk density indicates that the particle size distribution range of the microcapsules is wide and that the particle size is relatively small and that there are many microcapsules!
- the presence of microcapsules having a small particle size makes the distance between the microcapsules relatively small, improving the connectivity between pores and improving the pore volume.
- the pore volume is measured by the mercury intrusion method.
- microcapsules having a small particle size have a high effective pore former content because they are not easily destroyed by ceramic raw material particles when kneaded as clay. As a result, the pore volume may be increased.
- the relationship between the added amount of microcapsules and the pore volume of the ceramic honeycomb structure can be obtained by manufacturing the ceramic honeycomb structure by changing the added amount of microcapsules having the same filling bulk density. Therefore, measure the filling bulk density of the microcapsules used Therefore, the pore volume of the resulting honeycomb structure can be predicted from the relationship between the above-mentioned bulk density of the microcapsules and the pore volume of the ceramic honeycomb structure, and the addition amount of the micro force capsule and the ceramic honeycomb structure can be predicted. From the relationship with the pore volume, the amount of microcapsules added to obtain a desired pore volume can be determined.
- the filling bulk density is a bulk density when a prescribed compressive force is applied to the microcapsules.
- An example of a method for measuring the filling bulk density of microcapsules will be described.
- the microcapsule 30 is put into a bottomed pipe-shaped container 20 having an inner diameter of 30 mm and a depth of 100 mm, and
- a rod 40 having an outer diameter of about 30 mm is placed inside the container 20.
- the distance L between the open end 21 of the container 20 and the upper surface 31 of the microcapsule 30 after compression is measured to measure the microcapsule 30 after compression. Find the volume of.
- the compressive force is most preferably 0.13 MPa, more preferably 0 ⁇ 12 to 0 ⁇ 13 MPa.
- the pore volume of honeycomb structure A obtained by adding Ml (mass%) of microcapsules A with a bulk density of Ql (g m 3 ) to ceramic raw material is Vl (cm 3 / g).
- the pore volume V2 (cm 3 / g) of the honeycomb structure B obtained using the microcapsule B having a filling bulk density of Q2 (g m 3 ) is calculated as the pores of the honeycomb structure A.
- Vl (cm 3 / g) The pore volume of honeycomb structure A obtained by adding Ml (mass%) of microcapsules A with a bulk density of Ql (g m 3 ) to ceramic raw material.
- a ceramic honeycomb structure manufactured by adding Ml (mass%) of microcapsules A having a filling bulk density of Ql (g m 3 ) to a ceramic raw material has the same pore volume.
- M2 mass 0/0
- 01> 02 for micro power capsule ceramic raw material B packing bulk density of Q2 (g N m 3) is
- 2> ⁇ 1 Q1 ⁇ Q2
- M2 to Ml the volume of pores for each production is smaller than when adding a certain amount of microcapsules to ceramic powder as in the past.
- a honeycomb structure with little deformation can be obtained.
- a honeycomb structure having a stable pore volume by mixing two or more kinds of microcapsules having different filling bulk densities, and adjusting and using the mixture so as to obtain a desired filling bulk density.
- Microcapsules with a target filling bulk density Q are mixed with appropriate amounts of microcapsules having a filling bulk density Q1 larger than the filling bulk density Q and microcapsules having a filling bulk density Q2 smaller than the filling bulk density Q. Can be obtained.
- the filling bulk density of the microcapsules so as to be a constant value, it is possible to reduce the fluctuation of the pore volume of the honeycomb structure for each production. By manufacturing in this way, a honeycomb structure having a stable pore volume can be obtained even when there are fluctuations in properties between lots of microcapsules.
- (6) Method of defining by filling bulk density By using only microcapsules having a filling bulk density in a certain range, a honeycomb structure with a small variation in pore volume at every production can be obtained.
- a honeycomb structure having a stable pore volume is obtained by using microcapsules having a packing bulk density in the range of 0 ⁇ 13 to 0 ⁇ 17 g ⁇ m 3 when the compressive force is 0.13 MPa. be able to .
- a more preferable range of the filling bulk density of the microcapsules is 0.14 to 0.16 g.
- the specific surface area of the microcapsules is preferably 0 ⁇ 058 to 0 ⁇ 218 m 2 / ml.
- the specific surface area of the microcapsule is larger than 0.218, the hardness of the clay increases and the clay does not flow smoothly in the extrusion mold. If the specific surface area force of the microcapsule is smaller than S0.058, the extruded product may be deformed by its own weight.
- the specific surface area of the microcapsules is more preferably 0.13 ⁇ 0.18 m 2 / ml a still more preferred instrument 0 ⁇ 1 4 ⁇ 0 ⁇ 17 m 2 / ml.
- the specific surface area of microcapsules can be measured with a Microtrac particle size distribution analyzer
- the production method of the present invention includes a step of grasping a correlation between a filling bulk density of a microcapsule that is a pore-forming material and a pore volume, and a correlation between an addition amount of the microcapsule to be used and a pore volume. And a step of adjusting the addition amount of the mouthpiece capsule according to the filling bulk density of the microcapsule to be used.
- the microcapsule used in the present invention is a foamed foamed resin containing gas inside surrounded by a resin shell, and is used by mixing with a ceramic raw material as a pore former.
- Resin material The quality of the shell is not particularly limited, but the thickness of the shell which is preferably homopolymer or copolymer polymer such as acrylic, metatalylate or carboxylic acid is preferably 0.1 to 0.80.101.
- the microcapsules preferably contain 70 to 95% water. Since the average particle size of the microcapsules affects the average pore size of the honeycomb structure, it is appropriately selected according to the target average pore size.
- the average particle size is 38 to 6001, This is preferable because a strong correlation can be obtained between the filling bulk density of the microcapsules and the pore volume.
- a micro balloon described in JP-A-2003-38919 can be used as the microcapsule.
- the addition amount of the microcapsule is preferably 4 to 12% by mass, more preferably 6 to 10% by mass with respect to the ceramic raw material.
- the resin that encloses the liquid as the pore former is also generally called “microcapsule” S, and the micro-mouth capsule in the present invention refers to a resin in which gas is encapsulated, that is, a foamed foamed resin.
- the material of the ceramic raw material is not particularly limited and is effective for all materials that are usually used as a raw material for honeycomb structures.
- Cordierite, alumina, mullite, silicon nitride, sialon, silicon carbide, aluminum titanate, nitride It is preferable to include at least one of aluminum, LAS and the like.
- a ceramic honeycomb structure having cordierite as a main crystal is preferable because it has heat resistance, has a low thermal expansion coefficient, excellent thermal shock resistance, and can be manufactured at low cost.
- powders other than microcapsules as a pore former for example, powders mainly composed of carbon such as graphite, starch powders such as wheat flour and corn starch, resin powders such as polyethylene terephthalate and polymethyl methacrylate 1 type or 2 types or more may be included.
- each microcapsule 30 is put into a bottomed pipe-shaped container 20 having an inner diameter of 30 mm and a depth of 100 mm, and as shown in Fig. 2 (b), an outer diameter of about 30
- the distance L between the open end 21 of the container 20 and the upper surface 31 of the microcapsule 30 is measured, and the compressed microcapsule 30 The volume of was determined.
- a cordierite-generating raw material powder prepared by adjusting an appropriate amount of an oxide-based ceramic powder composed of kaolin, talc, fused silica, aluminum oxide, and aluminum hydroxide, and the above microcapsenoles A to J to the cordierite-forming raw material powder. 8% by mass was added.
- An appropriate amount of methylcellulose was added as a molding aid, water was added, mixed and kneaded to prepare 10 types of clays of Test Nos. 1 to 10 shown in Table 1. Each of these 10 types of clay was extruded in the direction of gravity from a known die for a honeycomb structure and dried to obtain each honeycomb formed body. The formability of these honeycomb formed bodies was evaluated according to the following criteria and shown in Table 1.
- FIG. 3 is a graph showing the relationship between the filling bulk density of microcapsules A to J of test Nos. L to 10 and the pore volume of the obtained honeycomb structure.
- Fig. 3 shows the density of microcapsules It was found that the degree and the pore volume of the obtained honeycomb structure were in a proportional relationship.
- a microcapsule G (test ⁇ ⁇ 7) with a filling bulk density smaller than that of microcapsule C, O. O g m 3 a honeycomb structure having a pore volume of 0.657 cm 3 / g is obtained.
- the amount of microcapsule G added should be larger than 8% by mass. Specifically, the addition amount can be determined as follows.
- Fig. 4 is a graph showing the relationship between the addition amount of microcapsules G shown in Table 2 and the pore volume of the honeycomb structure.
- Packing bulk density N 0.140 g using microcapsules G of m 3 the pore volume of the honeycomb structure when the filling bulk density of the microcapsules C 8 mass 0/0 was added a m 3 N 0.150 g 0.657 It can be seen that in order to obtain a honeycomb structure having a pore volume equivalent to cm 3 / g, the amount of added calories should be increased to 8.36% by mass.
- microcapsules B packing bulk density of m 3 N 0.160 g greater than microcapsules Test No. 3 (Test vo ⁇ 2), pore volume is 0.657 cm 3 / g
- the relationship between the amount of microcapsule B added and the pore volume of the honeycomb structure is similarly determined, and the amount of microphone capsule B added can be determined!
- a honeycomb structure was manufactured using this microcapsule C ′ in the same manner as in Test No. 3, and the pore volume was 0.655 cm 3 / g.
- Example 3 Among the microcapsules used in Test Nos. L to 10, when honeycomb structures were manufactured using microcapsules B to H having a filling bulk density of 0.13 to 0.17 gm 3, the results are shown in Table 1. As shown, it can be seen that the fluctuation range of the pore volume between samples is small and stable in a narrow range of 0 ⁇ 611 to 0 ⁇ 698 cm 3 / g.
- Further microphone port capsule C (Test vo ⁇ 3) in the range of m 3 packing bulk density N 0.14 to 0.157 g and microcapsules E to G (test vo ⁇ 5 to 8) honeycomb structure obtained by using the Furthermore, the pore volume force is stable in a narrow range of .636 to 0.670 cm 3 / g.
- the pore volume force As shown in Table 1, when a honeycomb structure was prepared by adding a certain amount (8% by mass) of microcapsules to the cordierite-producing raw material powder, the pore volume force .585 ⁇ It fluctuates in the range of 0.722 cm 3 / g, and the performance of the honeycomb structure is not stable.
- the pore volume force is smaller than S0.6 cm 3 / g, and the filling bulk density is 0.17.
- microcapsule A test No. 1
- Example 1 seven types of honeycomb structures were manufactured by changing the addition amount of microcapsules G having a filling bulk density of 0.14 gm 3 , and the amount of microcapsules added and the pore volume of the honeycomb structure were determined. Although correlations were obtained, these relationships can be approximated by straight lines as shown in Fig. 4. Therefore, if there are two microcapsules added, a relational expression equivalent to this relation can be obtained. In practice, the relational expression obtained from two points is sufficient. Furthermore, if the relationship between the amount of microcapsules added and the pore volume of the honeycomb structure is measured in advance for each microcapsule having a different filling bulk density, the target fineness can be determined according to the filling bulk density of the microcapsules used. Find the appropriate amount of microcapsule to make the pore volume.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Filtering Materials (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020087021095A KR101425497B1 (ko) | 2006-09-25 | 2007-09-25 | 세라믹 허니컴 구조체의 제조 방법 |
| EP07828365.2A EP2070892B1 (en) | 2006-09-25 | 2007-09-25 | Method for producing ceramic honeycomb structure |
| US12/281,669 US8309012B2 (en) | 2006-09-25 | 2007-09-25 | Method for producing ceramic honeycomb structure |
| CN2007800071024A CN101395102B (zh) | 2006-09-25 | 2007-09-25 | 陶瓷蜂窝构造体的制造方法 |
| JP2008537472A JP5304246B2 (ja) | 2006-09-25 | 2007-09-25 | セラミックハニカム構造体の製造方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006-258594 | 2006-09-25 | ||
| JP2006258594 | 2006-09-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008041548A1 true WO2008041548A1 (fr) | 2008-04-10 |
Family
ID=39268409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/068548 Ceased WO2008041548A1 (fr) | 2006-09-25 | 2007-09-25 | Procédé de fabrication d'une structure de céramique en nid d'abeilles |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8309012B2 (ja) |
| EP (1) | EP2070892B1 (ja) |
| JP (1) | JP5304246B2 (ja) |
| KR (1) | KR101425497B1 (ja) |
| CN (1) | CN101395102B (ja) |
| WO (1) | WO2008041548A1 (ja) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4769978B2 (ja) * | 2009-10-01 | 2011-09-07 | 住友化学株式会社 | チタン酸アルミニウム系セラミックス焼成体の製造方法 |
| US8821609B2 (en) | 2010-04-01 | 2014-09-02 | Hitachi Metals, Ltd. | Ceramic honeycomb filter and its production method |
| CN104876637A (zh) * | 2015-05-25 | 2015-09-02 | 中航复合材料有限责任公司 | 一种纤维增强纯无机阻燃泡沫复合材料及其制备方法 |
| US20180326613A1 (en) * | 2015-11-13 | 2018-11-15 | Asahi Kasei Kabushiki Kaisha | Methods for producing ceramic green body molded article and ceramic molded article |
| CN105665692B (zh) * | 2016-03-24 | 2018-05-11 | 洛阳理工学院 | 一种长水口用抗热震内衬复合体及其制备工艺 |
| CN109070384A (zh) * | 2016-03-30 | 2018-12-21 | 日本碍子株式会社 | 蜂窝成型体的干燥方法及蜂窝结构体的制造方法 |
| CN107935618B (zh) * | 2017-12-08 | 2020-08-25 | 温岭市腾锋鞋业有限公司 | 一种生态装饰硅藻泥-人造砂岩复合板及制备方法 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003038919A (ja) | 2001-07-27 | 2003-02-12 | Sekisui Chem Co Ltd | 多孔質セラミックフィルタの製造方法 |
| JP2003292388A (ja) * | 2002-03-29 | 2003-10-15 | Ngk Insulators Ltd | 多孔質材料及びその製造方法 |
| WO2005068398A1 (ja) | 2004-01-13 | 2005-07-28 | Ngk Insulators, Ltd. | セラミック構造体の製造方法 |
| JP2005230782A (ja) * | 2004-02-23 | 2005-09-02 | Ngk Insulators Ltd | 多孔質ハニカム構造体の製造方法 |
| JP2005314218A (ja) | 2004-03-31 | 2005-11-10 | Ngk Insulators Ltd | 多孔質構造体の細孔特性の制御方法 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3176054A (en) * | 1962-04-09 | 1965-03-30 | Harbison Walker Refractories | Insulating refractories |
| JP4266103B2 (ja) * | 2001-12-07 | 2009-05-20 | 日本碍子株式会社 | 多孔質セラミック体の製造方法 |
| WO2003082772A1 (en) * | 2002-03-29 | 2003-10-09 | Ngk Insulators, Ltd. | Method for producing cordierite-based porous material |
| JP4222600B2 (ja) * | 2003-01-07 | 2009-02-12 | 日本碍子株式会社 | セラミックハニカム構造体の焼成方法 |
| US7179316B2 (en) * | 2003-06-25 | 2007-02-20 | Corning Incorporated | Cordierite filters with reduced pressure drop |
| US7387829B2 (en) * | 2004-01-13 | 2008-06-17 | Ibiden Co., Ltd. | Honeycomb structure, porous body, pore forming material for the porous body, and methods for manufacturing the pore forming material, the porous body and the honeycomb structure |
| EP1785408A1 (fr) * | 2005-11-15 | 2007-05-16 | L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Procédé d'élaboration de supports poreux céramiques de microstructure contrôlée |
-
2007
- 2007-09-25 US US12/281,669 patent/US8309012B2/en active Active
- 2007-09-25 EP EP07828365.2A patent/EP2070892B1/en not_active Ceased
- 2007-09-25 JP JP2008537472A patent/JP5304246B2/ja active Active
- 2007-09-25 WO PCT/JP2007/068548 patent/WO2008041548A1/ja not_active Ceased
- 2007-09-25 KR KR1020087021095A patent/KR101425497B1/ko not_active Expired - Fee Related
- 2007-09-25 CN CN2007800071024A patent/CN101395102B/zh not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003038919A (ja) | 2001-07-27 | 2003-02-12 | Sekisui Chem Co Ltd | 多孔質セラミックフィルタの製造方法 |
| JP2003292388A (ja) * | 2002-03-29 | 2003-10-15 | Ngk Insulators Ltd | 多孔質材料及びその製造方法 |
| WO2005068398A1 (ja) | 2004-01-13 | 2005-07-28 | Ngk Insulators, Ltd. | セラミック構造体の製造方法 |
| JP2005230782A (ja) * | 2004-02-23 | 2005-09-02 | Ngk Insulators Ltd | 多孔質ハニカム構造体の製造方法 |
| JP2005314218A (ja) | 2004-03-31 | 2005-11-10 | Ngk Insulators Ltd | 多孔質構造体の細孔特性の制御方法 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP2070892A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2070892A1 (en) | 2009-06-17 |
| EP2070892A4 (en) | 2013-12-11 |
| US20090008811A1 (en) | 2009-01-08 |
| JPWO2008041548A1 (ja) | 2010-02-04 |
| KR20090054944A (ko) | 2009-06-01 |
| EP2070892B1 (en) | 2015-02-25 |
| CN101395102B (zh) | 2013-02-27 |
| JP5304246B2 (ja) | 2013-10-02 |
| CN101395102A (zh) | 2009-03-25 |
| KR101425497B1 (ko) | 2014-08-01 |
| US8309012B2 (en) | 2012-11-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2008041548A1 (fr) | Procédé de fabrication d'une structure de céramique en nid d'abeilles | |
| JP5880431B2 (ja) | セラミックハニカムフィルタ | |
| CN1674972A (zh) | 用于柴油机颗粒过滤器应用的硅酸铝镁结构 | |
| CN101506123A (zh) | 窄孔径分布的堇青石陶瓷蜂窝体制品及其制造方法 | |
| JP6559597B2 (ja) | ハニカム構造体の製造方法 | |
| WO2007108428A1 (ja) | ハニカム構造体の製造方法 | |
| EP2641644B1 (en) | Honeycomb structure and manufacturing method of honeycomb structure | |
| JP2020054985A (ja) | 排ガス浄化フィルタ及び排ガス浄化フィルタの製造方法 | |
| JP7227178B2 (ja) | ハニカムフィルタ | |
| JP2021501118A (ja) | 予備反応させた球状無機粒子および球状細孔形成剤を含むバッチ組成物ならびにそれからのハニカム体の製造方法 | |
| JP2021137684A (ja) | ハニカムフィルタ | |
| JP6496268B2 (ja) | セラミックス焼成体の製造方法 | |
| US20200101442A1 (en) | Exhaust gas purification filter and method of manufacture thereof | |
| JP2008037722A (ja) | ハニカム構造体の製造方法 | |
| JP7198789B2 (ja) | ハニカムフィルタの製造方法 | |
| JP7229192B2 (ja) | ハニカムフィルタ | |
| JP7399901B2 (ja) | ハニカムフィルタ、及びその製造方法 | |
| EP2143536A1 (en) | Process for producing ceramic honeycomb structure | |
| JP2003089575A (ja) | セラミックス構造体の製造方法 | |
| CN113332810B (zh) | 蜂窝过滤器的制造方法 | |
| JP2015174798A (ja) | 目封止ハニカム構造体 | |
| JP5327587B2 (ja) | セラミックスの製造方法 | |
| JP2007301931A (ja) | ハニカム構造体押出成形用坏土 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07828365 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2008537472 Country of ref document: JP Kind code of ref document: A |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 200780007102.4 Country of ref document: CN Ref document number: 1020087021095 Country of ref document: KR |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2007828365 Country of ref document: EP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 12281669 Country of ref document: US |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
