WO2010084925A1 - ガラス組成物および基板上にそれを具備する部材 - Google Patents
ガラス組成物および基板上にそれを具備する部材 Download PDFInfo
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- WO2010084925A1 WO2010084925A1 PCT/JP2010/050731 JP2010050731W WO2010084925A1 WO 2010084925 A1 WO2010084925 A1 WO 2010084925A1 JP 2010050731 W JP2010050731 W JP 2010050731W WO 2010084925 A1 WO2010084925 A1 WO 2010084925A1
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- glass
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- thermal expansion
- refractive index
- expansion coefficient
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/02—Surface treatment of glass, not in the form of fibres or filaments, by coating with glass
- C03C17/04—Surface treatment of glass, not in the form of fibres or filaments, by coating with glass by fritting glass powder
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/12—Silica-free oxide glass compositions
- C03C3/16—Silica-free oxide glass compositions containing phosphorus
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/02—Frit compositions, i.e. in a powdered or comminuted form
- C03C8/08—Frit compositions, i.e. in a powdered or comminuted form containing phosphorus
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
- C03C8/16—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions with vehicle or suspending agents, e.g. slip
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- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5022—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with vitreous materials
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- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/86—Glazes; Cold glazes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/854—Arrangements for extracting light from the devices comprising scattering means
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
- H10K77/10—Substrates, e.g. flexible substrates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a glass composition having a high refractive index, a low-temperature softening property and a small average thermal expansion coefficient, and a member comprising the glass composition on a substrate.
- Patent Documents 1 to 5 discloses or suggests that the above three conditions are simultaneously provided. It is necessary to simultaneously satisfy these three conditions in order to form a high refractive index film on a soda lime substrate by baking glass frit and glass paste.
- the glasses of Patent Documents 1 to 3 have been developed for precision press-molded lens applications. For this reason, the glasses of Patent Documents 1 to 3 are not intended to be fired as frit, and thus have a problem that the average thermal expansion coefficient is large.
- the glass of Patent Document 4 contains a large amount of bismuth. Therefore, the glass of patent document 4 has a problem that coloring is large and an average thermal expansion coefficient is also large.
- the glass of patent document 5 was developed as a use of a precision press-molded lens.
- the present invention provides a glass composition having a high refractive index, a low-temperature softening property and a small average thermal expansion coefficient, and a member comprising the glass composition on a substrate.
- the glass composition of the present invention has a refractive index (n d ) of 1.88 to 2.20, a glass transition temperature (T g ) of 450 ° C. to 490 ° C., and an average coefficient of thermal expansion from 50 ° C. to 300 ° C. ( ⁇ 50-300 ) is 60 ⁇ 10 ⁇ 7 / K or more and 90 ⁇ 10 ⁇ 7 / K or less, and the content of Bi 2 O 3 is 5 to 25% in terms of mol% on the basis of oxide. It is characterized by being.
- the glass frit of the present invention has a refractive index (n d ) of 1.88 to 2.20, a glass transition temperature (T g ) of 450 ° C.
- the member of the present invention has a refractive index (n d ) of 1.88 to 2.20, a glass transition temperature (T g ) of 450 ° C. to 490 ° C., and an average coefficient of thermal expansion (from 50 ° C.
- ⁇ 50-300 is 60 ⁇ 10 ⁇ 7 / K or more and 90 ⁇ 10 ⁇ 7 / K or less, and the content of Bi 2 O 3 is 5 to 25% in terms of mol% based on oxide. It is characterized by comprising a glass composition or glass frit.
- the present invention it is possible to provide a glass composition having a high refractive index, a low temperature softening property and a small average thermal expansion coefficient, and a member provided on the glass composition.
- the refractive index (n d ) of the glass composition of the present invention is in the range of 1.88 to 2.20. When it is in this range, when used as an organic LED scattering layer, the effect of extracting emitted light is great.
- the refractive index (n d ) of the glass composition of the present invention is preferably from 1.95 to 2.10.
- the glass transition temperature (T g ) of the glass composition of the present invention is 450 ° C. or higher and 490 ° C. or lower. Within this range, even if the glass frit of the present invention is baked and softened on a soda lime glass substrate, the substrate does not deform due to temperature.
- the glass transition temperature (T g ) is preferably 450 ° C. or higher and 480 ° C. or lower, and more preferably 450 ° C. or higher and 475 ° C. or lower.
- the average thermal expansion coefficient of the glass composition of the present invention is 60 ⁇ 10 ⁇ 7 / K or more and 90 ⁇ 10 ⁇ 7 / K or less in the range from 50 ° C. to 300 ° C. When this is satisfied, even after the glass frit of the present invention is baked and softened on a soda lime glass substrate, it does not break or warp the substrate greatly.
- the average thermal expansion coefficient from 50 ° C. to 300 ° C. is preferably 65 ⁇ 10 ⁇ 7 / K or more and 85 ⁇ 10 ⁇ 7 / K or less, particularly preferably 70 ⁇ 10 ⁇ 7 / K or more and 75 ⁇ 10 ⁇ 7 / K or less. preferable.
- the average thermal expansion coefficient is a numerical value measured by a thermomechanical analyzer (TMA).
- the glass composition of the present invention contains P 2 O 5 , Bi 2 O 3 , Nb 2 O 5 and ZnO as essential components, and includes B 2 O 3 , Li 2 O, Na 2 O, K 2 O, TiO 2 , WO 3 , TeO 2 , GeO 2 , Sb 2 O 3 , and alkaline earth metal oxide can be included as optional components.
- each component content is expressed in mol%, P 2 O 5 15-30%, Bi 2 O 3 5-25%, Nb 2 O 5 5-27%, ZnO 4-35%, B 2 O 3 0-17%, Li 2 O 0-14%, Na 2 O 0-7%, K 2 O 0-7%, TiO 2 0-13%, WO 3 0-20%, TeO 2 0-7%, GeO 2 0 to 7%, Sb 2 O 3 0 to 2%, alkaline earth metal oxide 0 to 10%, and the total amount of alkali metal oxide is 14% or less.
- P 2 O 5 is an essential component that forms a network structure serving as a glass skeleton, and imparts stability of the glass.
- P 2 O 5 is less than 15 mol%, devitrification is likely to occur, and when it exceeds 30 mol%, it is difficult to obtain a high refractive index necessary for the present invention.
- a preferred range is 19 to 28 mol%, and a more preferred range is 20 to 26 mol%.
- Bi 2 O 3 is an essential component that imparts a high refractive index and enhances the stability of the glass. If it is less than 5%, its effect is insufficient. At the same time, Bi 2 O 3 increases the average thermal expansion coefficient and increases the coloration, so the content is 25 mol% or less. A preferred range is 10 to 23 mol%, and a more preferred range is 13 to 20 mol%.
- Nb 2 O 5 is an essential component that imparts a high refractive index and lowers the average thermal expansion coefficient, and if it is less than 5 mol%, its effect becomes insufficient. At the same time, Nb 2 O 5 increases the glass transition temperature, so its content is 27 mol% or less. If Nb 2 O 5 exceeds 27 mol%, the glass transition temperature becomes too high and devitrification tends to occur.
- a preferred range is 7 to 20 mol%, and a more preferred range is 10 to 18 mol%.
- ZnO is an essential component having the effect of greatly reducing the glass transition temperature and imparting a high refractive index while suppressing an excessive increase in the average thermal expansion coefficient. If it is less than 4 mol%, the effect becomes insufficient. On the other hand, when ZnO exceeds 35 mol%, the tendency of devitrification of the glass increases.
- the content of ZnO is 4 to 35 mol%, preferably 16 to 35 mol% (7 to 17% in mass% notation), and 21 to 35 mol% (9 to 17% in mass% notation). More preferably, it exceeds 23 mol% and more preferably exceeds 10 mass% and up to 35 mol%. However, if the inclusion of ZnO 21 mol% or more, to avoid devitrification, it is preferable not to contain TiO 2 substantially.
- B 2 O 3 is not an essential component, but has an effect of improving the solubility of the glass. If it exceeds 17 mol%, devitrification and phase separation are likely to occur, and the high refractive index necessary for the present invention is increased. It becomes difficult to obtain.
- Li 2 O has the effect of lowering the glass transition temperature while imparting devitrification resistance of the glass, but at the same time increases the average thermal expansion coefficient.
- the Li 2 O content is preferably 0 to 14 mol%, more preferably 2 to 7 mol%. preferable.
- Na 2 O has an effect of imparting devitrification resistance to glass, but the inclusion thereof makes the average thermal expansion coefficient extremely large.
- Na 2 O can be contained in the range of 0 to 7 mol% (0 to 2.5% in terms of mass%), but it is more preferable that it is not substantially contained.
- K 2 O has an effect of imparting devitrification resistance to glass, but the inclusion thereof makes the average thermal expansion coefficient extremely large.
- K 2 O can be included in the range of 0 to 7 mol%, but it is more preferable that it is not substantially included.
- TiO 2 has the effect of imparting a high refractive index, but its inclusion makes it easy to devitrify as the glass transition temperature rises.
- TiO 2 can be contained in the range of 0 to 13 mol%, but is preferably 0 to 9 mol%, and more preferably substantially not contained.
- WO 3 has the effect of imparting a high refractive index without significantly changing the average thermal expansion coefficient and the glass transition temperature. However, if it exceeds 20 mol%, the coloring increases and the glass tends to devitrify.
- TeO 2 has the effect of lowering the glass transition temperature while suppressing an excessive increase in the average thermal expansion coefficient, but is 7 mol% or less because it is expensive and may erode the platinum crucible.
- GeO 2 has an effect of imparting a high refractive index, but it is not preferable to exceed 7 mol% because it is expensive.
- Sb 2 O 3 is not only effective as a fining agent, but also has an effect of suppressing coloring, and can be added in the range of 0 to 2 mol%.
- Alkaline earth metal oxides one or more of MgO, CaO, SrO, BaO
- the content exceeds 10 mol%, the refractive index is decreased and the average thermal expansion coefficient and Increases the glass transition temperature.
- Alkali metal oxides have the effect of imparting devitrification resistance to glass and lowering the glass transition temperature, but at the same time increase the average thermal expansion coefficient, so the total amount is preferably 14 mol% or less. More preferably, the content is 2 to 7 mol%.
- Na 2 O and K 2 O have a particularly large thermal expansion coefficient as compared with Li 2 O, so that Na 2 O and K 2 O are not substantially contained, and only Li 2 O is used. Is preferred.
- the glass composition of the present invention is SiO 2 , Al 2 O 3 , La 2 O 3 , Y 2 O 3 , Gd 2 O 3 , ZrO 2 , Ta 2 O 3 , Cs 2 as long as the effects of the invention are not lost.
- O, transition metal oxides, and the like can also be contained.
- the total content is preferably less than 5%, more preferably less than 3 mol%, and even more preferably substantially no content (the content is substantially zero).
- the glass of this invention does not contain lead oxide substantially (content is substantially zero), possibility of causing environmental pollution is low. “Substantially not contained” means that it is not actively contained, and includes cases where it is mixed as an impurity derived from other components.
- the glass composition of the present invention uses raw materials such as oxides, phosphates, metaphosphates, carbonates, nitrates and hydroxides, weighs them so as to have a predetermined composition, mixes them, It can be obtained by melting at a temperature of 950 to 1500 ° C. using a crucible such as platinum and casting it into a mold or pouring it into a gap between twin rolls and quenching. Also, it may be gradually cooled to remove the distortion.
- the glass frit of the present invention can be obtained by pulverizing the glass composition prepared by the above method with a mortar, ball mill, jet mill or the like and classifying it as necessary.
- the mass-based average particle size of the glass frit is typically 0.5 to 10 ⁇ m.
- the surface of the glass frit may be modified with a surfactant or a silane coupling agent.
- the mass reference average particle diameter is a particle diameter measured by a laser diffraction particle size distribution measurement method.
- the member of the present invention is a member in which a glass layer having a predetermined composition is formed on a glass or ceramic substrate.
- the thickness of the glass layer is typically 5-50 ⁇ m.
- the substrate used here preferably has an average coefficient of thermal expansion ( ⁇ 50-300 ) from 50 ° C. to 300 ° C. of 75 ⁇ 10 ⁇ 7 / K to 90 ⁇ 10 ⁇ 7 / K, for example, soda lime glass Or PD200 manufactured by Asahi Glass Co., Ltd., and a silica film or the like may be coated on the surface thereof.
- this member is obtained by kneading the glass frit with a solvent or a binder, if necessary, and applying it onto the substrate, followed by firing at a temperature about 60 ° C. higher than the glass transition temperature of the glass frit. It is obtained by softening the glass frit and cooling to room temperature.
- the solvent include ⁇ -terpineol, butyl carbitol acetate, phthalate ester, 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate
- the binder includes ethyl cellulose, acrylic resin, styrene resin, Examples thereof include phenol resin and butyral resin.
- a binder before softening a glass frit, it is preferable to include the process of baking at a temperature lower than a glass transition temperature and vaporizing a binder.
- the member of the present invention can contain a scattering material in the glass frit fired layer.
- the distribution of the scattering material in the fired layer becomes smaller from the inside of the fired layer toward the surface.
- the probability that the scattering material is present in the surface layer of the glass frit firing layer is lower than that in the scattering layer, so that a smooth surface can be obtained.
- a translucent electrode layer and an organic layer can be formed uniformly, and the distance between electrodes between the reflective electrode layer formed on the organic layer is also uniform. Become.
- the scattering material may be a bubble, a material particle having a composition different from that of the glass frit, or a precipitated crystal from the glass frit, and may be a single substance or a mixed state. .
- the refractive index of the translucent electrode layer is preferably less than or equal to the refractive index of the glass frit, and by satisfying this requirement, the emitted light from the organic layer can be efficiently extracted. Can do.
- the translucent electrode layer is typically ITO (Indium Tin Oxide), and SnO 2 , ZnO, IZO (Indium Zinc Oxide), or the like can also be used.
- Tables 1 to 3 show glass compositions in mol% for each example, refractive index (n d ), glass transition temperature (T g ), average thermal expansion coefficient from 50 ° C. to 300 ° C. ( ⁇ 50-300 ). It shows. In addition, the composition in terms of mass% converted based on the composition in terms of mol% is also shown. Each glass composition was evaluated as “good” when the glass transition temperature was 490 ° C. or less and the average thermal expansion coefficient was 60 ⁇ 10 ⁇ 7 / K or more and 85 ⁇ 10 ⁇ 7 / K or less. When the transition temperature was 475 ° C.
- Each glass composition uses oxides, phosphates, metaphosphates, and carbonates as raw materials for each component, and weighs the raw materials so that the composition shown in Table 1 is obtained after vitrification. After mixing, a platinum crucible is used to melt in a temperature range of 950 to 1350 ° C. in an electric furnace, and then cast into a carbon mold. Each glass composition was obtained by gradually cooling to.
- the refractive index (n d ), glass transition temperature (T g ), and average thermal expansion coefficient ( ⁇ 50-300 ) from 50 ° C. to 300 ° C. were measured as follows.
- Refractive index (n d ) After the glass was polished, it was measured by a V-block method using a Kalun precision refractometer KPR-2000.
- Glass transition temperature (T g ) The glass was processed into a round bar shape having a diameter of 5 mm and a length of 200 mm, and then measured with a thermomechanical analyzer (TMA) TD5000SA manufactured by Bruker AXS Co., Ltd. at a heating rate of 5 ° C./min.
- TMA thermomechanical analyzer
- Examples 28 to 31 The flaky glasses having the compositions shown in Examples 1, 2, 4, and 5 were weighed, mixed, and melted in the same manner as in Examples 1 to 29, and then the melt was poured into the gaps between the twin rolls and rapidly cooled. It was produced by doing. Each flake was dry pulverized with an alumina ball mill for 1 hour to obtain each glass frit. Each glass frit had a mass-based average particle size of about 3 ⁇ m. 75 g of each obtained glass frit was kneaded with 25 g of an organic vehicle (10% by mass of ethyl cellulose dissolved in ⁇ -terpineol) to prepare a glass paste.
- an organic vehicle 10% by mass of ethyl cellulose dissolved in ⁇ -terpineol
- This glass paste is printed on a 10cm square and 0.55mm thick soda lime glass substrate coated with a silica film on the center in a uniform 9cm square size so that the film thickness after firing is 30 ⁇ m. This was dried at 150 ° C. for 30 minutes. Then return to room temperature, raise the temperature to 450 ° C in 30 minutes, hold at 450 ° C for 30 minutes, then raise the temperature to 550 ° C in 12 minutes, hold at 550 ° C for 30 minutes, and then to room temperature for 3 hours The glass frit fired layer was formed on the soda-lime glass substrate.
- the soda-lime glass used has an average coefficient of thermal expansion ( ⁇ 50-300 ) from 50 ° C. to 300 ° C. of 83 ⁇ 10 ⁇ 7 / K.
- Table 5 shows the glass composition, refractive index (n d ), glass transition temperature (T g ), and average thermal expansion coefficient ( ⁇ 50-300 ) from 50 ° C. to 300 ° C. in mol% for each comparative example.
- Table 6 also shows the composition expressed in terms of mass% converted based on the composition expressed in terms of mol%. Each glass was evaluated as “impossible” when the glass transition temperature was not higher than 490 ° C. and the average thermal expansion coefficient was not higher than 60 ⁇ 10 ⁇ 7 / K and not higher than 85 ⁇ 10 ⁇ 7 / K.
- Comparative Examples 1 and 2 correspond to Examples 5 and 12 of Patent Document 3 (Japanese Patent Laid-Open No. 2006-111499) described above, respectively, and Comparative Example 3 is described in Patent Document 1 (Japanese Patent Laid-Open No. 2003/2003).
- Comparative Example 4 and 5 correspond to Examples 1 and 2 of Patent Document 2 (Japanese Patent Laid-Open No. 2003-160355), respectively, and Comparative Example 6, 7 and 8 correspond to Examples 1, 10, and 13 of Patent Document 5 (Japanese Patent Laid-Open No. 2007-51060) described above, respectively, and Comparative Example 9 corresponds to Patent Document 4 (Japanese Patent Laid-Open No. 2002-201039) described above. This corresponds to Example 3 of Japanese Patent Publication No. 3).
- Comparative Examples 11 and 12 Glass frit of each composition shown in Comparative Examples 1 and 10 was prepared by the same method as in Examples 28 to 31, and fired on the same soda lime glass substrate by the same method. Whether the substrate was cracked was observed, and the average value of the warp of the substrate at the four corners of the fired layer was measured to determine whether the warp was acceptable. In addition, when the average value of curvature exceeded 1.00 mm, it was judged that it was unacceptable. The results are listed in Table 7.
- the soda-lime glass used has an average coefficient of thermal expansion ( ⁇ 50-300 ) from 50 ° C. to 300 ° C. of 83 ⁇ 10 ⁇ 7 / K.
- a glass composition having a high refractive index, a low temperature softening property and a small average thermal expansion coefficient can be applied to an optical member, and it is possible to produce a highly efficient scattering light extraction member particularly for organic LED applications.
- the glass frit of the present invention does not cause deformation or unacceptable warp, and does not crack after firing and softening on a soda lime glass substrate. Therefore, the glass frit of the present invention can use soda lime glass as the substrate of the organic LED scattering layer, and can reduce the manufacturing cost.
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Abstract
Description
上記3つの条件のうち、多くて2つの条件を同時に備えたガラス組成物等が提案されている(特許文献1~5)。
なお、近年、酸化鉛を含むガラスの溶解では、環境汚染が重大な問題となっている。従って、ガラスには酸化鉛を含まないことが要求されている。
また、特許文献4のガラスは、ビスマスを多量に含有する。そのため、特許文献4のガラスは、着色が大きく、平均熱膨張係数も大きいという問題がある。
また、特許文献5のガラスは、精密プレス成形レンズが用途として開発されたものである。そのため、特許文献5のガラスは、フリットとして焼成することを目的としていないため、ガラス転移温度が高いという問題がある。
本発明は、高屈折率で低温軟化性を有し、かつ平均熱膨張係数の小さなガラス組成物、および基板上にそれを具備する部材を提供する。
本発明のガラスフリットは、屈折率(nd)が1.88以上2.20以下、ガラス転移温度(Tg)が450℃以上490℃以下、および50℃から300℃までの平均熱膨張係数(α50-300)が60×10-7/K以上90×10-7/K以下であって、Bi2O3の含有量は、酸化物基準のモル%表示で、5~25%であることを特徴とする。
本発明の部材は、屈折率(nd)が1.88以上2.20以下、ガラス転移温度(Tg)が450℃以上490℃以下、および50℃から300℃までの平均熱膨張係数(α50-300)が60×10-7/K以上90×10-7/K以下であって、Bi2O3の含有量は、酸化物基準のモル%表示で、5~25%であるガラス組成物若しくはガラスフリットにより構成されることを特徴とする。
本発明のガラス組成物の屈折率(nd)は1.95以上2.10以下が好ましい。
なお、本発明のガラスは、酸化鉛を実質的に含有しない(含有量が実質的に零である)ため、環境汚染を引き起こす可能性が低い。
ここで実質的に含有しないとは、積極的に含有しないということであり、他の成分由来による不純物として混入される場合を含むものとする
表1~3に各実施例のモル%表示によるガラスの組成と、屈折率(nd)、ガラス転移温度(Tg)、50℃から300℃までの平均熱膨張係数(α50-300)とを示す。また、モル%表示による組成に基づいて換算した質量%表示による組成も併記する。各ガラス組成物について、ガラス転移温度が490℃以下、かつ平均熱膨張係数が60×10-7/K以上85×10-7/K以下である場合に「良」と評価し、とりわけ、ガラス転移温度が475℃以下かつ平均熱膨張係数が70×10-7/K以上75×10-7/K以下である場合に「優」と評価した。いずれのガラス組成物とも各成分の原料として各々、酸化物、リン酸塩、メタリン酸塩、炭酸塩を使用し、ガラス化した後に表1に示す組成となるように前記原料を秤量し、十分混合した後、白金坩堝を用いて電気炉で950~1350℃の温度範囲で溶融した後、カーボン製の鋳型に鋳込み、鋳込んだガラスを転移温度まで冷却してから直ちにアニール炉に入れ、室温まで徐冷して各ガラス組成物を得た。
(1)屈折率(nd)
ガラスを研磨した後、カルニュー社製精密屈折計KPR-2000によって、Vブロック法で測定した。
(2)ガラス転移温度(Tg)
ガラスを直径5mm長さ200mmの丸棒状に加工した後、ブルッカー・エイエックスエス社製熱機械分析装置(TMA)TD5000SAによって、昇温速度を5℃/minにして測定した。
(3)50℃から300℃までの平均熱膨張係数(α50-300)
ガラスを直径5mm長さ200mmの丸棒状に加工した後、ブルッカー・エイエックスエス社製熱機械分析装置(TMA)TD5000SAによって、昇温速度を5℃/minにして測定した。50度におけるガラス棒の長さをL50とし、300度におけるガラス棒の長さをL300としたとき、50℃から300℃までの平均熱膨張係数(α50-300)は、α50-300={(L300/L50)―1}/(300-50)によって求められる。
実施例1、2、4、5に示した各組成のフレーク状ガラスを、実施例1~29と同様の方法で秤量、混合、溶融した後、その融液を双ロールの隙間に注いで急冷することによって作製した。各フレークをアルミナ製のボールミルで1時間乾式粉砕して、各ガラスフリットを得た。各ガラスフリットの質量基準平均粒径は、いずれも、3μm程度であった。得られた各ガラスフリット75gを、有機ビヒクル(α―テルピネオールにエチルセルロースを10質量%溶解したもの)25gと混練してガラスペーストを作製した。このガラスペーストを、シリカ膜を表面コートされた大きさ10cm角、厚さ0.55mmのソーダライムガラス基板上に、焼成後の膜厚が30μmとなるよう均一に9cm角のサイズで中央に印刷し、これを150℃で30分間乾燥した。その後一旦室温に戻し、450℃まで30分で昇温し、450℃で30分間保持し、その後、550℃まで12分で昇温し、550℃で30分間保持し、その後、室温まで3時間で降温し、ソーダライムガラス基板上にガラスフリット焼成層を形成した。そして、各々について、焼成層および基板の割れが発生しているかを観察し、また、焼成層の四隅における基板の反りの平均値を測定し、反りが許容できる程度であるかどうかを判断した。なお、反りの平均値が1.00mmを超える場合に許容できないと判断した。結果を表4に記載した。使用したソーダライムガラスの50℃から300℃までの平均熱膨張係数(α50-300)は83×10-7/Kである。
表5に各比較例のモル%表示によるガラスの組成と、屈折率(nd)、ガラス転移温度(Tg)、50℃から300℃までの平均熱膨張係数(α50-300)を示す。また、表6にモル%表示による組成に基づいて換算した質量%表示による組成も併記する。各ガラスについて、ガラス転移温度が490℃以下かつ平均熱膨張係数が60×10-7/K以上85×10-7/K以下、でない場合に「不可」と評価した。各々の物性値は実施例1~27と同様の方法で作製されたガラスについて、実施例1~27と同様の方法で測定したが、比較例9の屈折率(nd)は、着色が大きいため、測定不可能であった。
なお、比較例1、2はそれぞれ前述した特許文献3(日本国特開2006-111499号公報)の実施例5、12に相当し、比較例3は前述した特許文献1(日本国特開2003-300751号公報)の実施例3に相当し、比較例4、5はそれぞれ前述した特許文献2(日本国特開2003-160355号公報)の実施例1、2に相当し、比較例6、7、8はそれぞれ前述した特許文献5(日本国特開2007-51060号公報)の実施例1、10、13に相当し、比較例9は前述した特許文献4(日本国特開2002-201039号公報)の実施例3に相当する。
比較例1、10に示した各組成のガラスフリットを、実施例28~31と同様の方法で作製し、同様のソーダライムガラス基板上に同様の方法で焼成した後、各々について、焼成層および基板の割れが発生しているかを観察し、また、焼成層の四隅における基板の反りの平均値を測定し、反りが許容できる程度であるかどうかを判断した。なお、反りの平均値が1.00mmを超える場合に許容できないと判断した。結果を表7に記載する。使用したソーダライムガラスの50℃から300℃までの平均熱膨張係数(α50-300)は83×10-7/Kである。
101 ガラス層またはガラスフリットの焼成層
102 散乱物質
103 透光性電極層
Claims (10)
- 屈折率(nd)が1.88以上2.20以下、ガラス転移温度(Tg)が450℃以上490℃以下、および50℃から300℃までの平均熱膨張係数(α50-300)が60×10-7/K以上90×10-7/K以下であって、Bi2O3の含有量は、酸化物基準のモル%表示で、5~25%であることを特徴とするガラス組成物。
- 酸化物基準のモル%表示で、
P2O5 15~30%、
Nb2O5 5~27%、
ZnO 4~35%、
を含むことを特徴とする請求項1に記載のガラス組成物。 - 酸化物基準のモル%表示で、
B2O3 0~17%、
Li2O 0~14%、
Na2O 0~7%、
K2O 0~7%、
TiO2 0~13%、
WO3 0~20%、
TeO2 0~7%、
GeO2 0~7%、
Sb2O3 0~2%、
アルカリ土類金属酸化物0~10%の各成分を含み、
アルカリ金属酸化物の合量が14%以下であることを特徴する請求項1または2に記載のガラス組成物。 - Na2OおよびK2Oを実質的に含有しないことを特徴とする請求項1から3のいずれか一つに記載のガラス組成物。
- アルカリ金属酸化物の合量が2~7モル%である請求項1から4のいずれか一つに記載のガラス組成物。
- ZnOの含有量が23モル%を超えかつ10質量%を超え、TiO2を実質的に含有しない請求項1から5のいずれか一つに記載のガラス組成物。
- 酸化鉛を実質的に含有しないことを特徴とする請求項1から5のいずれか一つに記載のガラス組成物。
- 請求項1から7のいずれかに記載の組成のガラスフリット。
- ガラスまたはセラミック基板上に請求項1から8のいずれかに記載の組成のガラス層を具備する部材。
- ガラスまたはセラミック基板上で請求項8に記載のガラスフリットを焼成して得られるガラス層を具備する部材。
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| US9108881B2 (en) | 2010-01-22 | 2015-08-18 | Saint-Gobain Glass France | Glass substrate coated with a high-index layer under an electrode coating, and organic light-emitting device comprising such a substrate |
| JP2012025634A (ja) * | 2010-07-26 | 2012-02-09 | Asahi Glass Co Ltd | ガラス組成物および基板上にそれを具備する部材 |
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| WO2012017183A1 (fr) * | 2010-08-06 | 2012-02-09 | Saint-Gobain Glass France | Support a couche diffusante pour dispositif a diode electroluminescente organique, dispositif electroluminescent organique comportant un tel support |
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| EP2543645A4 (en) * | 2011-02-23 | 2014-01-08 | Hoya Corp | OPTICAL GLASS, GLASS MATERIAL FOR PRESSURE FORMING, AND OPTICAL ELEMENT |
| JP2012171848A (ja) * | 2011-02-23 | 2012-09-10 | Hoya Corp | 光学ガラス、プレス成形用ガラス素材および光学素子 |
| CN102858702A (zh) * | 2011-02-23 | 2013-01-02 | Hoya株式会社 | 光学玻璃、模压成型用玻璃坯料和光学元件 |
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| WO2014002903A1 (ja) * | 2012-06-28 | 2014-01-03 | Hoya株式会社 | 光学ガラスおよびその利用 |
| JP2014047095A (ja) * | 2012-08-30 | 2014-03-17 | Ohara Inc | 光学ガラス、光学素子、及びガラス成形体の製造方法 |
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| JPWO2014181641A1 (ja) * | 2013-05-09 | 2017-02-23 | 旭硝子株式会社 | 透光性基板、有機led素子、透光性基板の製造方法 |
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| WO2015092222A1 (fr) | 2013-12-17 | 2015-06-25 | Saint-Gobain Glass France | Support extracteur de lumière et dispositif oled l'incorporant |
| WO2015155481A1 (fr) | 2014-04-09 | 2015-10-15 | Saint-Gobain Glass France | Support extracteur de lumière et dispositif oled l'incorporant |
| WO2016009132A1 (fr) | 2014-07-17 | 2016-01-21 | Saint-Gobain Glass France | Support electroconducteur pour oled, oled l'incorporant, et sa fabrication |
Also Published As
| Publication number | Publication date |
|---|---|
| US8389428B2 (en) | 2013-03-05 |
| JPWO2010084925A1 (ja) | 2012-07-19 |
| EP2383236B1 (en) | 2018-04-18 |
| KR101653431B1 (ko) | 2016-09-01 |
| TW201036928A (en) | 2010-10-16 |
| EP2383236A1 (en) | 2011-11-02 |
| US20110287264A1 (en) | 2011-11-24 |
| JP5510337B2 (ja) | 2014-06-04 |
| EP2383236A4 (en) | 2014-01-01 |
| KR20110113178A (ko) | 2011-10-14 |
| CN102292300A (zh) | 2011-12-21 |
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