WO2011142215A1 - 耐火性フィラー及びこれを用いた封着材料、並びに耐火性フィラーの製造方法 - Google Patents
耐火性フィラー及びこれを用いた封着材料、並びに耐火性フィラーの製造方法 Download PDFInfo
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- WO2011142215A1 WO2011142215A1 PCT/JP2011/059539 JP2011059539W WO2011142215A1 WO 2011142215 A1 WO2011142215 A1 WO 2011142215A1 JP 2011059539 W JP2011059539 W JP 2011059539W WO 2011142215 A1 WO2011142215 A1 WO 2011142215A1
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- refractory filler
- willemite
- raw material
- producing
- glass
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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
- C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
- C03C10/0036—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and a divalent metal oxide as main constituents
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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
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
- C03C3/066—Glass compositions containing silica with less than 40% silica by weight containing boron containing zinc
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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
- C03C3/14—Silica-free oxide glass compositions containing boron
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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
- C03C8/02—Frit compositions, i.e. in a powdered or comminuted form
- C03C8/04—Frit compositions, i.e. in a powdered or comminuted form containing zinc
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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
- C03C8/22—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions containing two or more distinct frits having different compositions
Definitions
- the present invention relates to a refractory filler and a method for producing the same, and particularly to sealing of display devices such as a plasma display panel (hereinafter referred to as PDP), an organic EL display, a field emission display (hereinafter referred to as FED), and a fluorescent display tube (hereinafter referred to as VFD).
- PDP plasma display panel
- FED field emission display
- VFD fluorescent display tube
- the present invention relates to a refractory filler used as a sealing material for electronic parts such as a bonding material, a piezoelectric vibrator package, and an IC package, and a manufacturing method thereof.
- sealing material a composite powder material containing glass powder and a refractory filler is used.
- This sealing material is excellent in chemical durability and heat resistance as compared with a resin-based adhesive, and is suitable for ensuring airtightness.
- Patent Document 1 PbO—B 2 O 3 -based glass has been used as the glass powder (see Patent Document 1, etc.).
- Patent Document 2 Bi 2 O 3 —B 2 O 3 glass has a low melting point and has the same chemical durability as PbO—B 2 O 3 glass.
- a refractory filler When a refractory filler is used, the thermal expansion coefficient can be lowered and the mechanical strength can be improved.
- low expansion lead titanate has been used as a refractory filler.
- it is required to remove PbO from the composition of the refractory filler in the same manner as the glass powder. For this reason, willemite, cordierite, tin dioxide, ⁇ -eucryptite, mullite, silica, ⁇ -quartz solid solution, aluminum titanate, zircon and the like have been studied as refractory fillers.
- Patent Document 3 willemite has low expansion and good compatibility with Bi 2 O 3 —B 2 O 3 glass (it is difficult to devitrify Bi 2 O 3 —B 2 O 3 glass during sealing). Therefore, it attracts attention (see Patent Document 3 and Non-Patent Document 1).
- Refractory fillers such as willemite are generally produced by a solid phase reaction method.
- the raw material batch is fired for a long time at a temperature near the melting point (about 1510 ° C .; see Non-Patent Document 1), specifically at 1440 ° C. or higher.
- a temperature near the melting point about 1510 ° C .; see Non-Patent Document 1
- the firing temperature is too high, fusion of the fired product is likely to occur at the time of firing, and as a result, the pulverization efficiency of the fired product is greatly reduced, and the production cost of the refractory filler is increased.
- the refractory filler has an effect of reducing the thermal expansion coefficient of the sealing material or the like. Therefore, when the effect of reducing the thermal expansion coefficient is high, a desired thermal expansion coefficient can be obtained even if the content ratio of the refractory filler in the sealing material or the like is reduced. As a result, the content ratio of the glass powder contained in the sealing material or the like increases, and the fluidity of the sealing material or the like can be improved. On the other hand, when the effect of reducing the thermal expansion coefficient is low, it is difficult to obtain a desired thermal expansion coefficient if the content ratio of the refractory filler is lowered in a sealing material or the like.
- the present invention can reliably prevent a situation in which a part of the raw material remains unreacted while reducing the manufacturing cost, and can appropriately set the thermal expansion coefficient of the sealing material and the like. It is a technical problem to provide a refractory filler that can be reduced.
- the method for producing a refractory filler according to the first invention comprises melting a raw material batch and then cooling the obtained melt to obtain a main crystal (most precipitation amount). It is characterized by precipitating willemite as a crystalline) phase.
- the above-mentioned method for producing a refractory filler is characterized by melting a raw material batch. In this way, since the reaction time of the raw material batch can be shortened, the manufacturing cost of the refractory filler can be reduced. Moreover, since it is hard to generate
- the above-mentioned method for producing a refractory filler is characterized by cooling the melt. In this way, it becomes possible to precipitate crystals during cooling, and the manufacturing cost of the refractory filler can be reduced.
- the above-mentioned method for producing a refractory filler is characterized in that willemite is precipitated as the main crystal.
- the effect of lowering the thermal expansion coefficient is increased, so that it is easy to prevent a situation where the sealing part or the like is damaged due to thermal stress.
- a predetermined raw material batch it becomes possible to deposit willemite or the like as the main crystal phase during cooling.
- the crystallinity of the refractory filler when the crystallinity of the refractory filler is low, it is possible to increase the crystallinity of the refractory filler by providing a heat treatment step at 800 ° C. or higher after cooling.
- a heat treatment step at 800 ° C. or higher after cooling.
- sufficient crystals are precipitated during cooling, and such a heat treatment step may be omitted. preferable.
- the method for producing a refractory filler according to the first invention preferably cools the melt by pouring between the forming rollers.
- the refractory filler can be easily made finer and the particle size of the refractory filler can be easily adjusted.
- the manufacturing cost of the refractory filler can be easily reduced.
- the method for producing a refractory filler according to the first invention preferably cools the melt by pouring it into water. In this way, it is molded into a crushed shape during cooling, and a large number of cracks are formed in the molded product, so that the refractory filler is easily finely divided, and the particle size adjustment of the refractory filler is also facilitated. It becomes easy to reduce the manufacturing cost of the refractory filler. And it is also possible to precipitate a willemite crystal at the time of cooling.
- the method for producing a refractory filler according to the first invention is such that the composition of the refractory filler is mol%, ZnO 50-80%, SiO 2 10-40%, Al 2 O 3 0-10. It is preferable to prepare the raw material batch so as to contain%. If it does in this way, since it will become easy to precipitate willemite etc. as a main crystal phase at the time of cooling, it will become easy to reduce the manufacturing cost of a refractory filler.
- the production method of the refractory filler according to the first invention preferably has an average particle diameter D 50 of the raw batch is less than 20 [mu] m.
- the “average particle diameter D 50 ” refers to a value measured by the laser diffraction method, and in the volume-based cumulative particle size distribution curve measured by the laser diffraction method, the accumulated amount is accumulated from the smaller particle. Represents a particle size of 50%.
- the maximum particle diameter Dmax of the raw material batch is preferably less than 100 ⁇ m.
- the “maximum particle diameter D max ” indicates a value measured by the laser diffraction method, and in the cumulative particle size distribution curve based on the volume when measured by the laser diffraction method, the accumulated amount is accumulated from the smaller particle. Represents a particle size of 99%.
- the method for producing a refractory filler according to the first invention preferably deposits willemite and garnite as the main crystal phase. In this way, since the effect of improving the mechanical strength is greater than when the main crystal phase is only willemite, it becomes easier to prevent damage to the sealing site and the like, and the airtightness of the display device and the like is maintained. It becomes easy to do.
- the ratio of willemite and garnite is preferably in the range of 100: 0 to 70:30 in terms of molar ratio.
- the refractory filler according to the first invention is manufactured by the above method.
- the refractory filler according to the first invention is a refractory filler in which willemite is precipitated as the main crystal, and is prepared by melting the raw material batch and then cooling the obtained melt. It is characterized by being made.
- the sealing material according to the first invention is characterized in that in the sealing material containing glass powder and a refractory filler, all or part of the refractory filler is the above-mentioned refractory filler. To do.
- the refractory filler according to the second invention which was created in order to solve the above-mentioned problems, is a refractory filler in which willemite is precipitated as a main crystal (a crystal having the largest amount of precipitation).
- %, ZnO 50 to 80%, SiO 2 10 to 40%, Al 2 O 3 0.1 to 10%, and the ratio of willemite: Al-based crystal is 100: 0 to 99: It is characterized by 1.
- Al-based crystal refers to a crystal (for example, garnite) containing Al as a crystal component.
- the above refractory filler contains 50 to 80 mol% of ZnO and 10 to 40 mol% of SiO 2 as a composition. If it does in this way, since willemite will precipitate easily as a main crystal, the effect of reducing a thermal expansion coefficient becomes large. Further, the refractory filler of the present invention, a composition, the Al 2 O 3 containing not less than 0.1 mol%. In this way, since the refractory filler can be produced at a lower temperature than in the prior art, it is possible to prevent a situation in which unreacted raw material remains, and to surely reduce the manufacturing cost. Furthermore, the refractory filler of the present invention contains 10 mol% or less of Al 2 O 3 as a composition. If it does in this way, it will become easy to control the amount of precipitation of Al system crystal.
- the above refractory filler is characterized in that as a main crystal, willemite is precipitated, and the ratio of willemite: Al-based crystal is 100: 0 to 99: 1 in molar ratio. Willemite is precipitated as the main crystal, and if the amount of precipitated Al-based crystals is small, it is easy to enjoy the effect of lowering the thermal expansion coefficient of the sealing material, etc. It becomes possible to reduce appropriately.
- the Al-based crystal when an Al-based crystal is precipitated, the Al-based crystal is preferably garnite.
- garnite When garnite is precipitated in the same particle, the effect of improving the mechanical strength is enhanced. As a result, it becomes easy to prevent damage to the sealing part and the like, and it becomes easy to maintain the airtightness of the display device and the like.
- the refractory filler according to the second invention may be prepared by melting the raw material batch and then cooling the obtained melt, that is, prepared by a melting method. preferable. If the raw material batch is melted, the reaction time of the raw material batch can be shortened, so that the manufacturing cost of the refractory filler can be reduced. Moreover, since it will become difficult to generate
- the sealing material according to the second invention is characterized in that in the sealing material containing glass powder and a refractory filler, all or a part of the refractory filler is the above-mentioned refractory filler. .
- the first embodiment of the present invention will be described.
- the method for producing a refractory filler according to the first embodiment after melting a raw material batch, the obtained melt is cooled to precipitate willemite as a main crystal phase.
- various methods can be employed as a method for cooling the melt. For example, a method of pouring between molding rollers, a method of pouring into water, and the like are suitable. According to the former method, since it can shape
- the molded product is formed into a crushed shape upon cooling and a large number of cracks are formed in the molded product. Therefore, the molded product is easily pulverized, and the refractory filler is easily refined and adjusted in particle size. And it is also possible to precipitate a willemite crystal at the time of cooling.
- the refractory filler is, in mol%, ZnO 60 to 79.9% (preferably 63 to 70%), SiO 2 20 to 39.9% (preferably 28 to 35%). ), Preferably starting material batch so as to contain Al 2 O 3 0-10%.
- the batch composition of the raw material batch is also in terms of mol%: ZnO 60-79.9% (preferably 63-70%), SiO 2 20-39.9% (preferably 28-35%), Al 2 O 3 0- It is preferable to contain 10%.
- ZnO and SiO 2 are constituents of the crystal.
- Al 2 O 3 is a component of the crystal and is a component that lowers the melting point of the melt when added in a small amount.
- the content of Al 2 O 3 is preferably 0.1 mol% or more, 1 mol% or more, particularly 3 mol% or more. If the content of Al 2 O 3 is less than 0.1 mol%, garnite is difficult to precipitate, and the effect of lowering the melting point of the melt is poor. On the other hand, if the content of Al 2 O 3 is too large, the molded product is easily vitrified, so that it is difficult to deposit willemite, and the component balance of the melt is impaired, conversely, the melting point of the melt. Tends to rise, making it difficult to melt the raw material batch.
- the above-mentioned method for producing a refractory filler preferably uses a raw material batch that does not substantially contain PbO. In this way, environmental demands in recent years can be satisfied.
- substantially does not contain PbO refers to a case where the content of PbO is 1000 ppm (mass) or less.
- the method of manufacturing a refractory filler preferably has an average particle diameter D 50 of the raw batch is less than 20 [mu] m.
- the density difference between the raw materials becomes large.
- the average particle diameter D 50 of the raw batch is too large, due to the density difference between the raw material, since the suspended solids precipitated and SiO 2 of ZnO is likely to occur, it difficult to obtain a homogeneous melt, As a result, the composition of the refractory filler tends to be non-uniform.
- the density of the ZnO raw material is 5.6 g / cm 3 and the density of the SiO 2 raw material is 2.6 g / cm 3 .
- the maximum particle size D max of the raw material batch is less than 100 ⁇ m.
- the density difference between the raw materials increases.
- the maximum particle diameter Dmax of the raw material batch is too large, it becomes difficult to obtain a homogeneous melt because ZnO precipitation or SiO 2 suspended matter is likely to occur due to the density difference between the raw materials.
- the composition of the refractory filler tends to be non-uniform.
- willemite and garnite As the main crystal phase, it is preferable to deposit willemite and garnite as the main crystal phase.
- the effect of improving the mechanical strength is greater than when the main crystal phase is only willemite.
- the effect of lowering the thermal expansion coefficient can also be enjoyed accurately due to the precipitation of willemite.
- the ratio of garnite is small, the effect of increasing the mechanical strength becomes poor.
- the proportion of garnite is too large, the effect of reducing the thermal expansion coefficient becomes poor.
- the method for producing the refractory filler preferably includes a step of pulverizing and classifying the molded product so that the average particle diameter D 50 is 20 ⁇ m or less, particularly 2 to 15 ⁇ m. If it does in this way, it will become easy to narrow down sealing thickness.
- the average particle diameter D 50 of the refractory filler is preferably at least 0.5 [mu] m.
- the above method for producing a refractory filler preferably includes a step of pulverizing and classifying the molded product so that the maximum particle diameter Dmax is 100 ⁇ m or less, particularly 10 to 75 ⁇ m. In this way, the glaze surface can be easily smoothed and the sealing thickness can be easily reduced.
- pulverization method a ball mill, jaw crusher, jet mill, disc mill, spectro mill, grinder, mixer mill and the like can be used, but a ball mill is preferable from the viewpoint of running cost and pulverization efficiency.
- the refractory filler according to the first embodiment of the present invention is manufactured by the above method. Moreover, it is preferable that the refractory filler of this invention does not contain PbO substantially for the above-mentioned reason.
- the sealing material according to the first embodiment of the present invention is a sealing material containing glass powder and a refractory filler, wherein all or part of the refractory filler is a refractory filler produced by the above method. It is characterized by being.
- the content of the refractory filler in the sealing material is preferably 0.1 to 70% by volume, 15 to 50% by volume, particularly 20 to 40% by volume. When the content of the refractory filler is more than 70% by volume, the content of the glass powder is relatively reduced, so that the fluidity of the sealing material is lowered, and as a result, the sealing strength is easily lowered.
- examples of the refractory filler include cordierite, zircon, ⁇ -eucryptite, quartz glass, alumina, mullite, zirconium tungstate phosphate, tungstic acid.
- zirconium and alumina-silica ceramics may be included.
- These refractory fillers are useful from the viewpoints of adjusting the thermal expansion coefficient, adjusting the fluidity, and improving the mechanical strength.
- the total content of these refractory fillers is preferably 0 to 30% by volume, particularly preferably 0 to 10% by volume.
- glass powders can be used as the glass powder.
- Bi 2 O 3 —B 2 O 3 —ZnO glass, V 2 O 5 —P 2 O 5 glass, and SnO—P 2 O 5 glass are suitable in terms of low melting point characteristics
- Bi 2 O 3- B 2 O 3 —ZnO-based glass is particularly preferable in terms of thermal stability and water resistance.
- “to glass” is a glass containing an explicit component as an essential component and a total amount of the explicit component of 30 mol% or more, preferably 40 mol% or more, more preferably 50 mol% or more. Point to.
- glass powder does not contain PbO substantially in a glass composition from an environmental viewpoint.
- Bi 2 O 3 -B 2 O 3 -ZnO based glass as a glass composition, in mol%, Bi 2 O 3 30 ⁇ 60%, B 2 O 3 10 ⁇ 35%, to contain ZnO 1 ⁇ 35% preferable.
- the reason for limiting the content range of each component as described above will be described below. In the description of the glass composition range,% display indicates mol%.
- Bi 2 O 3 is a main component for lowering the softening point, and its content is preferably 30 to 60%, 36 to 55%, and particularly preferably 37 to 52%.
- Bi 2 content of O 3 is too small, too high softening point, the fluidity tends to decrease.
- the content of Bi 2 O 3 is too large, the glass tends to devitrify during firing, due to the devitrification and the fluidity tends to decrease.
- B 2 O 3 is an essential component as a glass forming component, and its content is preferably 10 to 35%, 15 to 30%, particularly preferably 18 to 28%.
- B 2 O 3 content is too small, it becomes a glass network is hardly formed, the glass is liable to devitrify during firing.
- the content of B 2 O 3 is too large, the viscosity of the glass becomes high, the fluidity tends to decrease.
- ZnO is a component that enhances devitrification resistance, and its content is preferably 1 to 35%, 5 to 30%, 10 to 25%, particularly preferably 13 to 25%. When the content is less than 1% or more than 35%, the component balance of the glass composition is impaired, and the devitrification resistance tends to be lowered.
- SiO 2 is a component that increases water resistance, but has an action of increasing the softening point. For this reason, the SiO 2 content is preferably 0 to 4%, 0 to 3%, 0 to 2%, particularly preferably 0 to 1%. If the content of SiO 2 is too large, the glass tends to be devitrified during firing.
- CuO + Fe 2 O 3 (total amount of CuO and Fe 2 O 3 ) is a component that enhances devitrification resistance, and its content is 0 to 25%, 0.01 to 10%, particularly 0.1 to 10%. Is preferred.
- the content of Bi 2 O 3 is increased.
- glass becomes easy to devitrify at the time of baking, and fluidity
- the Bi 2 O 3 content is 30% or more, the tendency becomes remarkable.
- CuO is a component that enhances devitrification resistance, and its content is preferably 0 to 15%, particularly preferably 0.1 to 10%. When there is too much content of CuO, the component balance of a glass composition will be impaired and devitrification resistance will fall easily conversely.
- Fe 2 O 3 is a component that enhances devitrification resistance, and its content is preferably 0 to 10%, 0.1 to 10%, particularly preferably 0.3 to 5%.
- content of Fe 2 O 3 is too large, balance of components the glass composition is impaired, the devitrification resistance is liable to decrease conversely.
- BaO is a component that increases devitrification resistance.
- the BaO content is preferably 0 to 12%, particularly preferably 1 to 8%.
- the component balance of a glass composition will be missing, conversely, the thermal stability of glass will be impaired and it will become easy to devitrify glass. If the BaO content is restricted to 1 to 8%, the thermal stability of the glass can be remarkably enhanced.
- Al 2 O 3 is a component that improves water resistance, and its content is preferably 0 to 10%, 0 to 5%, particularly preferably 0 to 2%. When the content of Al 2 O 3 is too large, there is a possibility that the softening point is unduly increased.
- Sb 2 O 3 is a component that enhances devitrification resistance, and its content is preferably 0 to 5%, particularly preferably 0.1 to 2%. When the content of Sb 2 O 3 is too large, balance of components the glass composition is impaired, the devitrification resistance is liable to decrease conversely.
- the average particle diameter D 50 of the glass powder less than 15 ⁇ m, 0.5 ⁇ 10 ⁇ m, particularly 1 ⁇ 5 [mu] m is preferred. As the average particle diameter D 50 of the glass powder is small, the softening point of the glass powder is lowered.
- the above-mentioned sealing material may be used in a powder state, but from the viewpoint of improving handleability, it is preferable to uniformly knead it with a vehicle to form a paste.
- a vehicle usually includes a solvent and a resin.
- the resin is added for the purpose of adjusting the viscosity of the paste.
- surfactant, a thickener, etc. can also be added as needed.
- the produced paste is applied to the surface of an object to be sealed using an applicator such as a dispenser or a screen printer.
- acrylic acid ester (acrylic resin), ethyl cellulose, polyethylene glycol derivative, nitrocellulose, polymethylstyrene, polyethylene carbonate, methacrylic acid ester and the like can be used.
- acrylic acid esters and nitrocellulose are preferable because they have good thermal decomposability.
- Solvents include N, N′-dimethylformamide (DMF), ⁇ -terpineol, higher alcohol, ⁇ -butyllactone ( ⁇ -BL), tetralin, butyl carbitol acetate, ethyl acetate, isoamyl acetate, diethylene glycol monoethyl ether, Diethylene glycol monoethyl ether acetate, benzyl alcohol, toluene, 3-methoxy-3-methylbutanol, water, triethylene glycol monomethyl ether, triethylene glycol dimethyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monobutyl ether, tripropylene glycol monomethyl ether , Tripropylene glycol monobutyl ether, propylene carbonate, dimethyl sulfoxide (DMSO), - methyl-2-pyrrolidone or the like can be used.
- ⁇ -terpineol is preferable because it is highly viscous and
- the sealing material of the present invention is preferably sintered into a predetermined shape and used as a tablet.
- a tablet also referred to as a press frit, a glass sintered body, or a glass molded body
- the tablet has an insertion hole for inserting the exhaust pipe.
- the exhaust pipe is inserted into the insertion hole, and the tip of the exhaust pipe is aligned with the position of the exhaust hole of the panel and fixed with a clip or the like. .
- an exhaust pipe is attached to a panel by softening a tablet by a secondary baking process (sealing process). If the above sealing material is processed into a tablet, the exhaust pipe can be easily connected to the exhaust equipment when installed, and the inclination of the exhaust pipe can be reduced. It becomes easy to install so that reliability is maintained.
- Tablets are produced by multiple heat treatments.
- a resin or solvent is added to the sealing material to form a slurry.
- this slurry is put into a granulator such as a spray dryer to produce granules.
- the granules are dried at a temperature at which the solvent volatilizes (about 100 to 200 ° C.).
- the produced granules are put into a mold designed to have a predetermined size, and then dry press-molded into a ring shape to produce a pressed body.
- the resin remaining in the press body is decomposed and volatilized in a heat treatment furnace such as a belt furnace, and then sintered at a temperature about the softening point of the sealing material.
- a tablet having a predetermined shape can be produced.
- the number of times of sintering may be multiple. In this way, the strength of the tablet is improved and it is easy to prevent the tablet from being broken or broken.
- the above-mentioned sealing material is made into a tablet and then attached to the tip of the exhaust pipe further expanded in diameter to be used as a tablet-integrated exhaust pipe. In this way, it is not necessary to align the center of the exhaust pipe and the tablet, and the installation work of the exhaust pipe can be simplified.
- the tablet-integrated exhaust pipe it is necessary to first heat-treat the tablet in contact with the tip of the exhaust pipe, and to bond the tablet to the tip of the exhaust pipe in advance.
- the jig for fixing the exhaust pipe is preferably made of a material to which the tablet is not fused, such as a carbon jig.
- the adhesion between the exhaust pipe and the tablet may be performed in the vicinity of the softening point of the sealing material for a short time, for example, about 5 to 10 minutes.
- SiO 2 —Al 2 O 3 —B 2 O 3 glass containing a predetermined amount of an alkali metal oxide is suitable, and FE-2 manufactured by Nippon Electric Glass Co., Ltd. is particularly suitable.
- This exhaust pipe has a thermal expansion coefficient of 85 ⁇ 10 ⁇ 7 / ° C., a heat resistant temperature of 550 ° C., and has dimensions of, for example, an outer diameter of 5 mm and an inner diameter of 3.5 mm.
- the diameter of the tip of the exhaust pipe is increased, the self-supporting stability can be improved. In that case, the flare shape or the flange shape is preferable for the tip of the exhaust pipe.
- FIG. 1 shows an example of a tablet-integrated exhaust pipe having this configuration. That is, FIG. 1 is a cross-sectional view of the tablet-integrated exhaust pipe, in which the tip of the exhaust pipe 1 is enlarged in diameter, and the tablet 2 is bonded to the tip of the exhaust pipe on the panel side.
- a tablet and a high melting point tablet are attached to the tip of the expanded exhaust pipe, and the tablet is attached to the tip of the enlarged exhaust pipe, A structure attached to the rear end side of the tablet is preferable.
- the area in contact with the panel or the like becomes larger than in the case of the exhaust pipe alone, so that it becomes easy to attach the panel vertically to the panel.
- a high melting point tablet can be placed between the tablet and the jig, eliminating the need for a special jig and, as a result, simplifying the manufacturing process of the tablet-integrated exhaust pipe be able to.
- the tablet is bonded to the outer peripheral surface of the distal end portion of the exhaust pipe, the tablet is bonded only to the outer peripheral surface of the distal end portion of the exhaust pipe, In other words, a configuration in which the surface is not bonded to the panel or the like is more preferable. If it does in this way, it will become easy to prevent the situation where the component of a tablet flows into an exhaust hole in a vacuum exhaust process.
- the high melting point tablet part is fixed directly to the exhaust pipe via the tablet instead of directly adhering to the exhaust pipe, the high melting point tablet part is fixed with a clip in the secondary firing process, and the exhaust pipe is pressure sealed. This is preferable because it is possible.
- FIG. 2 is a cross-sectional view of the tablet-integrated exhaust pipe, in which the distal end portion of the exhaust pipe 1 is enlarged, and the tablet 2 is bonded to the distal end portion on the outer peripheral surface side of the flange portion 1a of the exhaust pipe 1. is doing.
- the high melting point tablet 3 is not bonded to the outer peripheral surface side of the exhaust pipe 1.
- the tablet 2 is attached to the front end side of the flange portion 1 a, and the high melting point tablet 3 is attached to the rear end portion side of the flange portion 1 a than the tablet 2.
- ST-4 and FN-13 manufactured by Nippon Electric Glass Co., Ltd. are preferable as high melting point tablets.
- the method for producing the high melting point tablet is the same as the method for producing the tablet when the material is glass.
- ceramics, metal, etc. can also be used as a high melting point tablet.
- the refractory filler according to the second embodiment contains, as a composition, mol%, ZnO 50 to 80%, SiO 2 10 to 40%, and Al 2 O 3 0.1 to 10%.
- mol% ZnO 50 to 80%
- SiO 2 10 to 40% SiO 2 10 to 40%
- Al 2 O 3 0.1 to 10%.
- ZnO is a component for precipitating willemite, and its content is 50 to 80%, preferably 60 to 79.9%, particularly 63 to 70%. When the content of ZnO is out of the above range, the amount of Willemite deposited tends to decrease.
- SiO 2 is a component for precipitating willemite, and its content is 10 to 40%, preferably 20 to 39.9%, particularly 28 to 35%. When the content of SiO 2 is out of the above range, the amount of willemite deposited tends to decrease.
- Al 2 O 3 is a component for enhancing the melting property, and its content is 0.1 to 10%, preferably 0.5 to 8%, particularly 1 to 6%.
- the content of Al 2 O 3 is less than 0.1%, the effect of increasing the meltability becomes poor.
- the content of Al 2 O 3 is more than 10%, it becomes easy to vitrify at the time of cooling, and crystals are hardly precipitated.
- the precipitation amount of the Al-based crystal increases, and the effect of reducing the thermal expansion coefficient of the sealing material or the like becomes poor.
- the proportion of the Al-based crystal is increased, the effect of reducing the thermal expansion coefficient of the sealing material or the like is likely to be reduced.
- the above refractory filler does not substantially contain PbO, as in the first embodiment.
- the average particle diameter D 50 is preferably 20 ⁇ m or less, particularly preferably 2 to 15 ⁇ m.
- the average particle diameter D 50 of the refractory filler is preferably at least 0.5 [mu] m.
- the maximum particle size D max is preferably 100 ⁇ m or less, particularly preferably 10 to 75 ⁇ m.
- the above refractory filler can be produced by various methods. For example, after firing a raw material batch made of various oxides in a firing furnace or the like, the obtained fired body is pulverized (solid phase reaction method), or the raw material batch is once melted, and then the obtained melt is A cooling and pulverizing method (melting method) can be employed.
- the refractory filler produced by the melting method is less liable to precipitate Al-based crystals than the refractory filler produced by the solid phase reaction method, and the thermal expansion coefficient tends to be low. Therefore, the above refractory filler is preferably produced by a melting method.
- various methods can be employed as a method for cooling the melt. For example, as in the first embodiment, a method of pouring between forming rollers, a method of pouring into water, and the like are suitable.
- the average particle diameter D 50 of the raw batch, as in the first embodiment, is preferably less than 20 [mu] m. Further, the maximum particle diameter Dmax of the raw material batch is preferably less than 100 ⁇ m, as in the first embodiment.
- the method described in the first embodiment can be similarly used.
- the above refractory filler is preferably combined with glass powder and used as a sealing material. That is, the sealing material according to the second embodiment of the present invention is characterized in that, in a sealing material containing glass powder and a refractory filler, all or part of the refractory filler is the above refractory filler. To do.
- the content of the refractory filler in the sealing material is preferably 0.1 to 70% by volume, 15 to 50% by volume, and particularly preferably 20 to 40% by volume.
- Various glass powders can be used as the glass powder. Specifically, as exemplified in the first embodiment, Bi 2 O 3 —B 2 O 3 —ZnO glass, V 2 O 5 —P 2 O 5 glass, SnO—P 2 O 5 glass is used. It is suitable in terms of low melting point characteristics.
- the above-mentioned sealing material may be used in a powder state, but it is preferable to uniformly knead it with a vehicle to form a paste.
- a vehicle usually includes a solvent and a resin.
- this resin and solvent those described in the first embodiment can be used in the same manner.
- surfactant, a thickener, etc. can also be added as needed.
- the sealing material according to the second embodiment is preferably sintered into a predetermined shape and used as a tablet.
- Table 1 shows examples of the first embodiment (sample Nos. 1 to 4) and comparative examples (samples No. 5 and 6).
- Sample no. 1 to 4 were produced. First, raw materials for various oxides were prepared so that the compositions in the table were obtained, and raw material batches were prepared. Next, the raw material batch is put in a platinum crucible and melted at the melting temperature in the table for 3 hours, and then the obtained melt is cooled between casting rollers (double rollers) to be cooled and formed into a film shape. Molded. Subsequently, the obtained film was pulverized by a ball mill and then classified by a 250 mesh pass sieve to obtain a refractory filler having an average particle diameter D 50 of 10 ⁇ m. In the table, this method is described as “melting method”.
- Sample no. 5 and 6 were produced. First, raw materials of various oxides were prepared so as to have the composition shown in the table, and then pulverized and mixed for 1 hour using a ball mill to prepare a raw material batch. Next, the raw material batch was put in an alumina crucible and fired at the firing temperature in the table for 20 hours. Finally, the obtained fired product was pulverized, pulverized with a ball mill, and classified with a 250 mesh pass sieve to obtain a refractory filler having an average particle diameter D 50 of 12 ⁇ m. In the table, this method is referred to as “solid phase reaction method”.
- Table 2 shows examples of the first embodiment (sample Nos. 7 to 10).
- Sample no. 7 to 10 were produced. First, raw materials for various oxides were prepared so as to have the composition described in the table, and raw material batches were prepared. Next, the raw material batch was put into a platinum crucible and melted at the melting temperature in the table for 3 hours, and then the obtained melt was cooled into water to form a crushed shape. Subsequently, the obtained ground pulverized product was pulverized with a ball mill and then classified with a 250 mesh pass sieve to obtain a refractory filler having an average particle size D 50 of 10 ⁇ m. In the table, this method is indicated as “melting method”.
- Table 3 shows examples of the second embodiment (sample Nos. 11 to 14) and comparative examples (sample Nos. 15 to 17).
- Sample no. 11 to 13 and 15 were produced. First, raw materials for various oxides were prepared so that the compositions in the table were obtained, and raw material batches were prepared. Next, the raw material batch was put in a platinum crucible and melted at 1580 ° C. for 1 hour, and then the obtained melt was cooled between casting rollers (double rollers) to cool and mold into a film shape. Subsequently, the obtained film was pulverized with a ball mill and then classified with a sieve of 250 mesh pass to obtain a refractory filler having an average particle diameter D 50 of 12 ⁇ m. In the table, this method is indicated as “melting method”.
- Sample no. 14 was produced. First, raw materials of various oxides were prepared so as to have the composition shown in the table, and then pulverized and mixed for 1 hour using a ball mill to prepare a raw material batch. Next, the raw material batch was put in an alumina crucible and fired at 1440 ° C. for 20 hours. The obtained small organisms were crushed and then fired again at 1440 ° C. for 20 hours. Finally, the obtained fired product was pulverized, pulverized with a ball mill, and classified with a 250 mesh pass sieve to obtain a refractory filler having an average particle diameter D 50 of 12 ⁇ m. In the table, this method is referred to as “solid phase reaction method”.
- Sample no. 16 and 17 were produced. First, raw materials of various oxides were prepared so as to have the composition shown in the table, and then pulverized and mixed for 1 hour using a ball mill to prepare a raw material batch. Next, the raw material batch was put in an alumina crucible and baked at 1420 ° C. for 20 hours. Finally, the obtained fired product was pulverized, pulverized with a ball mill, and classified with a 250 mesh pass sieve to obtain a refractory filler having an average particle diameter D 50 of 12 ⁇ m. In the table, this method is referred to as “solid phase reaction method”.
- XRD X-ray diffractometer
- the meltability was evaluated as follows. First, raw materials for various oxides were prepared so that the compositions in the table were obtained, and raw material batches were prepared. Next, after putting this raw material batch in a platinum crucible and holding at 1500 ° C. for 30 minutes, when the platinum crucible is taken out, the state that the raw material batch is completely melted is “good”, and the raw material batch remains. The state of being “bad”.
- the lower limit melting temperature was investigated as follows. First, raw materials for various oxides were prepared so that the compositions in the table were obtained, and raw material batches were prepared. Next, this raw material batch was put in a platinum crucible and held at a temperature in increments of 1440 ° C. to 10 ° C. for 30 minutes, and the state of the raw material batch was observed at each temperature. The lowest temperature at which the raw material batch completely melted was defined as the lower melting temperature.
- the thermal expansion coefficient was evaluated as follows. First, glass powder made of bismuth glass was prepared. The glass composition of the glass powder was 76.4% Bi 2 O 3 , 8.1% B 2 O 3 , 6.4% ZnO, 5.8% BaO, 2.2% CuO, and Fe 2. O 3 0.5%, Sb 2 O 3 0.6%, and the average particle diameter D 50 was about 10 ⁇ m. Next, 35% by volume of the refractory filler in the table and 65% by volume of the above glass powder were added and mixed, followed by firing at 500 ° C. to obtain a dense sintered body. Subsequently, the obtained sintered body was processed into a predetermined shape to prepare a measurement sample for TMA (push bar thermal expansion coefficient measurement). TMA was performed using this measurement sample. The measurement temperature range is 30 to 300 ° C.
- the method for producing a refractory filler according to the present invention includes (1) sealing materials for display devices such as PDP, organic EL display, FED, and VFD, and (2) coating of display devices such as PDP, organic EL display, FED, and VFD. Materials, (3) sealing materials for electronic components such as piezoelectric vibrator packages, IC packages, (4) sealing materials for cores of magnetic heads or cores and sliders, (5) silicon solar cells, dye-sensitized solar It is suitable as a method for producing a fireproof filler used for sealing materials for solar cells such as batteries, and (6) sealing materials for lighting devices such as organic EL lighting.
- sealing materials for display devices such as PDP, organic EL display, FED, and VFD
- Materials (3) sealing materials for electronic components such as piezoelectric vibrator packages, IC packages, (4) sealing materials for cores of magnetic heads or cores and sliders, (5) silicon solar cells, dye-sensitized solar It is suitable as a method for producing a fireproof filler used for sealing materials
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Abstract
Description
Claims (15)
- 原料バッチを融解した後、得られた融液を冷却することにより、主結晶相として、ウイレマイトを析出させることを特徴とする耐火性フィラーの製造方法。
- 成形ローラー間に流し出すことにより、融液を冷却することを特徴とする請求項1に記載の耐火性フィラーの製造方法。
- 水中に流し出すことにより、融液を冷却することを特徴とする請求項1に記載の耐火性フィラーの製造方法。
- 耐火性フィラーが、組成として、モル%で、ZnO 50~80%、SiO2 10~40%、Al2O3 0~10%を含有するように、原料バッチを調製することを特徴とする請求項1~3のいずれか1項に記載の耐火性フィラーの製造方法。
- 原料バッチの平均粒子径D50が20μm未満であることを特徴とする請求項1~4のいずれか1項に記載の耐火性フィラーの製造方法。
- 原料バッチの最大粒子径Dmaxが100μm未満であることを特徴とする請求項1~5のいずれか1項に記載の耐火性フィラーの製造方法。
- 主結晶相として、ウイレマイト及びガーナイトを析出させることを特徴とする請求項1~6のいずれか1項に記載の耐火性フィラーの製造方法。
- ウイレマイトとガーナイトの割合が、モル比で、100:0~70:30の範囲内であることを特徴とする請求項7に記載の耐火性フィラーの製造方法。
- 請求項1~8のいずれかに1項に記載の方法で製造されていることを特徴とする耐火性フィラー。
- 主結晶として、ウイレマイトが析出している耐火性フィラーであって、
原料バッチを融解した後、得られた融液を冷却することで作製されてなることを特徴とする耐火性フィラー。 - ガラス粉末と耐火性フィラーを含む封着材料において、
耐火性フィラーの全部又は一部が、請求項9又は10に記載の耐火性フィラーであることを特徴とする封着材料。 - 主結晶としてウイレマイトが析出している耐火性フィラーにおいて、
組成として、モル%で、ZnO 50~80%、SiO2 10~40%、Al2O3 0.1~10%を含有し、
ウイレマイト:Al系結晶の割合が、モル比で、100:0~99:1であることを特徴とする耐火性フィラー。 - Al系結晶が析出している場合、そのAl系結晶がガーナイトであることを特徴とする請求項12に記載の耐火性フィラー。
- 原料バッチを融解した後、得られた融液を冷却することで作製されてなることを特徴とする請求項12又は13に記載の耐火性フィラー。
- ガラス粉末と耐火性フィラーを含む封着材料において、
耐火性フィラーの全部又は一部が、請求項12~14のいずれか1項に記載の耐火性フィラーであることを特徴とする封着材料。
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CN201180023136.9A CN102892724B (zh) | 2010-05-10 | 2011-04-18 | 耐火性填料及使用其的密封材料以及耐火性填料的制造方法 |
US13/695,636 US8871664B2 (en) | 2010-05-10 | 2011-04-18 | Refractory filler, sealing material using same, and manufacturing method for refractory filler |
KR1020127027149A KR101464996B1 (ko) | 2010-05-10 | 2011-04-18 | 내화성 필러 및 이것을 사용한 밀봉 재료, 및 내화성 필러의 제조 방법 |
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JP2011-057320 | 2011-03-16 | ||
JP2011057320A JP5779922B2 (ja) | 2011-03-16 | 2011-03-16 | 耐火性フィラー及びこれを用いた封着材料 |
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JPH02133336A (ja) * | 1988-11-10 | 1990-05-22 | Asahi Glass Co Ltd | 封着用組成物 |
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