WO2016117248A1 - β-ユークリプタイト微粒子の製造方法 - Google Patents
β-ユークリプタイト微粒子の製造方法 Download PDFInfo
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- WO2016117248A1 WO2016117248A1 PCT/JP2015/085295 JP2015085295W WO2016117248A1 WO 2016117248 A1 WO2016117248 A1 WO 2016117248A1 JP 2015085295 W JP2015085295 W JP 2015085295W WO 2016117248 A1 WO2016117248 A1 WO 2016117248A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/0013—Controlling the temperature of the process
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/26—Aluminium-containing silicates, i.e. silico-aluminates
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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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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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
- 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
- C04B35/19—Alkali metal aluminosilicates, e.g. spodumene
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/74—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by peak-intensities or a ratio thereof only
Definitions
- the present invention relates to a method for producing ⁇ -eucryptite fine particles.
- CTE Coefficient of Thermal Expansion
- ⁇ -eucryptite ( ⁇ -LiAlSiO 4 ) is a metal oxide having a negative CTE.
- ⁇ -eucryptite ( ⁇ -LiAlSiO 4 ) is a metal oxide having a negative CTE.
- ⁇ -LiAlSiO 4 is a metal oxide having a negative CTE.
- it in order to use it as a filler for reducing the CTE of a semiconductor sealing material, to increase the filling density of the resin. It is necessary to make the particle diameter as small as possible.
- Patent Document 1 discloses a eucryptite filler used for an insulating composite material. It is disclosed that LiO 2 , SiO 2 , and Al 2 O 3 are used as starting materials, and heat treatment at 1000 to 1400 ° C. is preferable for synthesizing single phase eucryptite.
- Patent Document 2 after mixing lithium chloride, aluminum chloride, and sodium silicate aqueous solutions, precipitation or precipitation is performed to form nano-sized seed particles, and sodium ions as impurities are removed by a predetermined method.
- a method of heat-treating is disclosed.
- Patent Document 1 since an oxide is used as a raw material, a high temperature exceeding 1000 ° C. is required to obtain ⁇ -eucryptite. Therefore, the obtained ⁇ -eucryptite is not excellent in pulverizability and pulverization, and it is difficult to increase the packing density of the epoxy resin and the like, and is not useful as a filler for reducing the CTE of the composite material.
- the present invention has been made in view of such circumstances, and an object of the present invention is to provide a production method in which removal of sodium ions is unnecessary and ⁇ -eucryptite fine particles are obtained by heat treatment at a temperature lower than that of the prior art. To do.
- the inventors of the present invention spray-dried a solution containing a water-soluble lithium salt, a water-soluble aluminum salt, and colloidal silica, and then calcined it in the air, so that 600 to 1300. It was found that ⁇ -eucryptite fine particles can be produced in the range of ° C.
- the present invention relates to a method for producing ⁇ -eucryptite fine particles according to any one of the following first to fifth aspects.
- a method for producing ⁇ -eucryptite fine particles in the ⁇ -eucryptite fine particles, the (121) plane X-ray diffraction peak intensity I ⁇ of the ⁇ phase and the X-ray diffraction peak intensity I ⁇ belonging to the (102) plane of the ⁇ phase
- the method for producing ⁇ -eucryptite fine particles according to the first aspect wherein the ratio I ⁇ / I ⁇ is less than 0.05 and the crystallite diameter is less than 80 nm
- the method for producing ⁇ -eucryptite fine particles according to the first aspect or the second aspect wherein the water-soluble lithium salt is an organic acid salt of lithium
- the method for producing ⁇ -eucryptite fine particles according to the first aspect or the second aspect wherein the water-soluble aluminum salt is an organic acid salt of aluminum
- the organic acid constituting the organic acid salt of lithium and / or the organic acid salt of aluminum is citric acid
- the calcination temperature is excellent in the range of 600 to 1300 ° C., and the X-ray diffraction peak intensity I ⁇ of the (121) plane of the ⁇ phase and the X attributed to the (102) plane of the ⁇ phase.
- ⁇ -eucryptite fine particles having a ratio I ⁇ / I ⁇ to the line diffraction peak intensity I ⁇ of less than 0.05 and a crystallite diameter of less than 80 nm can be produced.
- the ⁇ -eucryptite fine particles produced according to the present invention can increase the packing density of filler particles when used as a filler for semiconductor encapsulants and the like, and are highly effective in improving insulation and reducing CTE. Demonstrate.
- the present invention relates to a method for producing ⁇ -eucryptite fine particles.
- the method for preparing the solution containing the water-soluble lithium salt, the water-soluble aluminum salt and the colloidal silica is not particularly limited, and the water-soluble lithium salt, the water-soluble aluminum salt and the colloidal silica are mixed by any method. do it.
- the water-soluble lithium salt may use the powder, but it is preferable to use it beforehand as an aqueous solution.
- the solid content concentration of the aqueous solution in terms of Li 2 O may be arbitrary, but is preferably 1 to 20% by mass.
- the solid content concentration in terms of Al 2 O 3 of the aqueous solution may be arbitrary, but is preferably 1 to 20% by mass.
- the colloidal silica an aqueous dispersion thereof is preferably used, and the solid content concentration in terms of SiO 2 may be arbitrary, but is preferably 1 to 40% by mass.
- the water-soluble lithium salt used in the present invention is a lithium salt that dissolves 1% by mass or more in water at 25 ° C., an inorganic acid salt such as lithium chloride, lithium nitrate, lithium sulfate, lithium citrate, lithium oxalate, Examples include organic acid salts such as lithium glycolate, lithium malate, lithium tartrate, lithium lactate, lithium malonate, lithium succinate, lithium formate, and lithium acetate.
- an inorganic acid salt such as lithium chloride, lithium nitrate, lithium sulfate, lithium citrate, lithium oxalate
- organic acid salts such as lithium glycolate, lithium malate, lithium tartrate, lithium lactate, lithium malonate, lithium succinate, lithium formate, and lithium acetate.
- water-soluble lithium salts include lithium hydroxide and lithium carbonate such as hydrochloric acid, nitric acid, sulfuric acid, citric acid, oxalic acid, glycolic acid, malic acid, tartaric acid, lactic acid, malonic acid, succinic acid, formic acid, and acetic acid. What was melt
- dissolved in can also be used.
- the water-soluble lithium salt can be used alone or in combination of two or more.
- the water-soluble aluminum salt used in the present invention is an aluminum salt that dissolves 1% by mass or more in water at 25 ° C., and is an inorganic acid salt such as aluminum chloride or aluminum nitrate, aluminum citrate, aluminum oxalate, or aluminum glycolate. And organic acid salts such as aluminum malate, aluminum tartrate, aluminum lactate, aluminum malonate, aluminum succinate, aluminum formate, and aluminum acetate.
- dry aluminum hydroxide gel is peptized with acids such as hydrochloric acid, nitric acid, citric acid, oxalic acid, glycolic acid, malic acid, tartaric acid, lactic acid, malonic acid, succinic acid, formic acid, acetic acid, etc.
- acids such as hydrochloric acid, nitric acid, citric acid, oxalic acid, glycolic acid, malic acid, tartaric acid, lactic acid, malonic acid, succinic acid, formic acid, acetic acid, etc.
- acids such as hydrochloric acid, nitric acid, citric acid, oxalic acid, glycolic acid, malic acid, tartaric acid, lactic acid, malonic acid, succinic acid, formic acid, acetic acid, etc.
- a dissolved basic salt can be preferably used.
- the mixing ratio of the dry aluminum hydroxide gel and the acid is not particularly limited as long as the dry aluminum hydroxide gel can be peptized or dissolved by heating.
- the heating temperature at this time is preferably 80 ° C. or higher.
- the primary particle size of the colloidal silica used in the present invention is measured by observation with a transmission electron microscope, and the range thereof is 2 to 50 nm, and preferably 2 to 25 nm. If the primary particle size is less than 1 nm, the stability of the mixed solution may deteriorate and gelation may occur. Further, when the primary particle diameter of colloidal silica exceeds 50 nm, amorphous silica remains or ⁇ -eucryptite (hereinafter referred to as ⁇ phase) having a positive thermal expansion coefficient is easily generated, which is preferable. Absent.
- the production method of colloidal silica is not particularly limited, and those produced by a method of growing colloidal particles using water glass as a raw material or a method of growing particles after hydrolyzing silicon alkoxide can be used.
- colloidal silica used as a raw material.
- Colloidal silica is usually commercially available as an aqueous silica sol (for example, Snowtex (registered trademark) OXS, Snowtex O, Snowtex 30).
- the organic solvent dispersion is commercially available as an organosilica sol.
- Known dispersion media for organosilica sol include methanol, isopropanol, ethylene glycol, methyl ethyl ketone, methyl isobutyl ketone, and ethyl acetate.
- lithium salt, water-soluble aluminum salt and colloidal silica be dried in a uniformly mixed state, and spray drying can be performed by spraying while maintaining the uniform mixed state in the solution or spray drying based on the dryer. It is preferable to use an apparatus.
- spray drying can be performed by spraying while maintaining the uniform mixed state in the solution or spray drying based on the dryer. It is preferable to use an apparatus.
- the temperature atmosphere at the time of drying with a spray dryer or a spray drying apparatus is preferably 50 ° C. or higher and lower than 300 ° C., and is preferably lower than the decomposition temperature of the water-soluble lithium salt, water-soluble aluminum salt and colloidal silica used.
- the atmosphere for drying is not particularly limited, and may be any of air, oxidizing atmosphere, reducing atmosphere, or inert atmosphere.
- Calcination of the obtained dry powder has a temperature atmosphere in the air or in an oxidizing atmosphere in the range of 600 to 1300 ° C, preferably in the range of 600 to 1000 ° C.
- the firing time is 0.5 to 50 hours, preferably 1 to 20 hours.
- the obtained ⁇ -eucryptite fine particles are sintered and become difficult to disintegrate. Therefore, it is not preferable because it becomes difficult to increase the packing density of the filler particles when used as a filler such as a semiconductor sealing material.
- the temperature atmosphere during firing is less than 600 ° C.
- the water-soluble lithium salt, the water-soluble aluminum salt and the colloidal silica do not sufficiently react, so that carbon remains or ⁇ -eucryptite is hardly generated. This is not preferable.
- the ratio I alpha / I beta is less than 0.05 of the X-ray diffraction peak intensity I beta attributable to (102) plane of the X-ray diffraction peak intensity I alpha and beta phase (121) plane of alpha phase as the index It is preferable that the ratio is less than 0.01.
- the crystallite size of the ⁇ -eucryptite fine particles is preferably 1 nm or more and less than 80 nm. This is because, when the crystallite diameter is 80 nm or more, the sintering of ⁇ -eucryptite fine particles proceeds and it becomes difficult to disintegrate after firing. It is known that the ⁇ phase is dislocated to the ⁇ phase by firing at a high temperature exceeding 1000 ° C., but if it is fired at a high temperature for dislocation, it becomes difficult to disintegrate by sintering. The formation of ⁇ phase should be suppressed.
- X-ray diffraction analysis [X-ray diffraction analysis] X-ray source: Cu, voltage: 40 kV, current: 40 mA, STEP width: 0.04 °, integration time: 0.5 SEC / STEP, divergence slit 1 °, divergence, using Rigaku X-ray diffractometer RINT Ultimate + The measurement was performed under the conditions of a vertical restriction slit of 10 mm, a scattering slit of 1 °, and a light receiving slit of 0.3 mm. (Measurement of crystallite diameter) The X-ray diffraction data of each sample was calculated based on Scherrer's equation using analysis software JADE.
- the ⁇ phase employs a crystallite diameter perpendicular to the (121) plane
- the ⁇ phase employs a crystallite diameter perpendicular to the (102) plane.
- the obtained aluminum citrate aqueous solution had a solid content concentration (in terms of Al 2 O 3 ) of 5.00% by mass.
- the solution was passed through glass filter paper (Advantech, GA-100) and quantitative filter paper (Advantech, No. 5C) to obtain a light yellow transparent aluminum oxalate aqueous solution.
- the obtained aluminum oxalate aqueous solution had a solid content concentration (in terms of Al 2 O 3 ) of 5.00% by mass.
- Example 1 Colloidal silica (Snowtex (registered trademark) OXS, manufactured by Nissan Chemical Industries, Ltd., silica concentration 10.5% by mass, primary particle diameter 5 nm by transmission electron microscope observation) 515.0 g (SiO 2 0.9 mol) Then, 917.6 g (Al 2 O 3 0.45 mol) of the aqueous aluminum citrate solution obtained in Production Example 1 and 835.4 g of the aqueous lithium citrate solution obtained in Production Example 2 were added and stirred at room temperature for 10 minutes. did. The obtained mixture had a specific gravity of 1.075, a pH of 2.8, and an electric conductivity of 15.0 mS / cm.
- the obtained mixed liquid was sprayed using a spray dryer (Palvis Mini Spray GB210-A type, manufactured by Yamato Scientific Co., Ltd.), inlet temperature 185 ° C., atomizing air pressure 1.4 kgf / cm 2 , aspirator flow rate 0. Drying was performed under conditions of 50 m 3 / min and a liquid feed rate of 4 g / min. The outlet temperature at this time was 80 ⁇ 3 ° C.
- the obtained dry powder (3.0 g) was placed in an alumina crucible and fired at 800 ° C. for 1 hour in the atmosphere using an electric furnace to obtain 0.7 g of a light grayish white powder.
- the produced phase consisted of almost a single phase of ⁇ -eucryptite, and the intensity ratio I ⁇ / I ⁇ of the X-ray diffraction peak was less than 0.01.
- the crystallite size of the ⁇ phase was 62 nm.
- the specific surface area by the nitrogen adsorption method was 1.6 m 2 / g.
- Example 2 Before firing at 800 ° C. in the air, the same procedure as in Example 1 was performed except that a preliminary firing was performed at 500 ° C. for 5 hours in the air using an electric furnace. The obtained white powder was identified by X-ray diffraction analysis. As a result, the produced phase consisted of almost a single phase of ⁇ -eucryptite, and the intensity ratio I ⁇ / I ⁇ of the X-ray diffraction peak was less than 0.01. . The crystallite size of the ⁇ phase was 61 nm. The specific surface area according to the nitrogen adsorption method was 1.3 m 2 / g.
- Example 3 Colloidal silica (Snowtex (registered trademark) OXS, manufactured by Nissan Chemical Industries, Ltd., silica concentration 10.5% by mass, primary particle diameter 5 nm by transmission electron microscope observation) 572.2 g (SiO 2 1 mol) 1019. 6 g (0.5 mol of Al 2 O 3 ) of the aluminum oxalate aqueous solution obtained in Example 3 and 924.1 g (0.5 mol of Li 2 O) of the lithium oxalate aqueous solution obtained in Production Example 4 were added, and Stirred under for 10 minutes. The obtained mixture had a specific gravity of 1.068, pH of 2.0, and electric conductivity of 22.3 mS / cm.
- the obtained mixed liquid was sprayed using a spray dryer (Palvis Mini Spray GB210-A type, manufactured by Yamato Scientific Co., Ltd.), inlet temperature 185 ° C., atomizing air pressure 1.4 kgf / cm 2 , aspirator flow rate 0. Drying was performed under conditions of 50 m 3 / min and a liquid feed rate of 4 g / min. The outlet temperature at this time was 80 ⁇ 3 ° C.
- the obtained dry powder (3.0 g) was put in an alumina crucible and fired at 800 ° C. for 1 hour in the air using an electric furnace to obtain 1.1 g of a white powder.
- the obtained white powder was identified by X-ray diffraction analysis.
- the product phase consisted of a substantially single phase of ⁇ -eucryptite, and the intensity ratio I ⁇ / I ⁇ of the X-ray diffraction peak was 0.02.
- the crystallite size of the ⁇ phase was 46 nm.
- the specific surface area determined by the nitrogen adsorption method was 4.1 m 2 / g.
- Example 4 A white powder was prepared in the same manner as in Example 1 except that the temperature of the mixture when colloidal silica, an aqueous solution of aluminum citrate and an aqueous solution of lithium citrate was dried with a spray dryer and then calcined in the atmosphere for 1 hour was 900 ° C. 0.9 g was obtained.
- the obtained white powder was identified by X-ray diffraction analysis.
- the produced phase consisted of almost a single phase of ⁇ -eucryptite, and the intensity ratio I ⁇ / I ⁇ of the X-ray diffraction peak was less than 0.01. .
- the crystallite size of the ⁇ phase was 66 nm.
- the specific surface area by the nitrogen adsorption method was 1.6 m 2 / g.
- Example 5 After drying the mixed liquid of colloidal silica, aluminum oxalate aqueous solution and lithium oxalate aqueous solution with a spray drier, it was carried out in the same manner as in Example 3 except that baking in the atmosphere was carried out at 600 ° C. for 20 hours. 1 g was obtained. The obtained white powder was identified by X-ray diffraction analysis. As a result, the product phase consisted of a substantially single phase of ⁇ -eucryptite, and the intensity ratio I ⁇ / I ⁇ of the X-ray diffraction peak was 0.03. The crystallite diameter was 44 nm. The specific surface area determined by the nitrogen adsorption method was 7.3 m 2 / g.
- Example 6 Instead of colloidal silica (Snowtex (registered trademark) OXS, manufactured by Nissan Chemical Industries, Ltd., silica concentration 10.5% by mass, primary particle diameter 5 nm by transmission electron microscope observation), colloidal silica (Snowtex (registered trademark)) ) This was carried out in the same manner as in Example 1 except that OL, manufactured by Nissan Chemical Industries, Ltd., silica concentration 40.5% by mass, primary particle diameter 42 nm by transmission electron microscope observation) was used. The obtained light grayish white powder was identified by X-ray diffraction analysis.
- OL manufactured by Nissan Chemical Industries, Ltd., silica concentration 40.5% by mass, primary particle diameter 42 nm by transmission electron microscope observation
- the product phase consisted of almost a single phase of ⁇ -eucryptite, and the X-ray diffraction peak intensity ratio I ⁇ / I ⁇ was 0. 03.
- the crystallite size of the ⁇ phase was 24 nm.
- the specific surface area determined by the nitrogen adsorption method was 24.7 m 2 / g.
- Example 7 Colloidal silica (Snowtex (registered trademark) OXS, manufactured by Nissan Chemical Industries, Ltd., silica concentration 10.5% by mass, primary particle diameter 5 nm by transmission electron microscope observation) 572.2 g (SiO 2 1 mol) 1019.6 g of aluminum malonate aqueous solution obtained in Example 5 (0.5 mol of Al 2 O 3 ) and 464.4 g of lithium malonate aqueous solution obtained in Production Example 6 (0.5 mol of Li 2 O) were added at room temperature. Stirred under for 10 minutes. The obtained mixture had a specific gravity of 1.090, a pH of 3.83, and an electric conductivity of 15.6 mS / cm.
- the obtained mixed liquid was sprayed using a spray dryer (Palvis Mini Spray GB210-A type, manufactured by Yamato Scientific Co., Ltd.), inlet temperature 185 ° C., atomizing air pressure 1.4 kgf / cm 2 , aspirator flow rate 0. Drying was performed under conditions of 50 m 3 / min and a liquid feed rate of 4 g / min.
- the outlet temperature at this time was 80 ⁇ 3 ° C. 3.0 g of the obtained dry powder is put in an alumina crucible, and calcined in the atmosphere at a temperature of 500 ° C. for 5 hours using an electric furnace, and then calcined in the atmosphere at a temperature of 800 ° C. for 1 hour.
- the product phase consisted of a substantially single phase of ⁇ -eucryptite, and the intensity ratio I ⁇ / I ⁇ of the X-ray diffraction peak was 0.04.
- the crystallite size of the ⁇ phase was 41 nm.
- the specific surface area by the nitrogen adsorption method was 2.7 m 2 / g.
- Example 1 The same procedure as in Example 1 was performed except that firing in the atmosphere using an electric furnace was only performed at 500 ° C. for 5 hours. When the obtained black powder was identified by X-ray diffraction analysis, a halo pattern was observed, and the crystalline phase of ⁇ -eucryptite could not be confirmed.
- Example 2 The mixed liquid was dried in the same manner as in Example 1 except that the mixed liquid was placed in a recovery flask and dried under reduced pressure at 30 Torr using a rotary evaporator instead of the spray dryer.
- the product phase was a mixed phase of ⁇ phase and ⁇ phase, and the intensity ratio I ⁇ / I ⁇ of the X-ray diffraction peak was 0.13.
- the crystallite size of the ⁇ phase was 34 nm.
- the specific surface area according to the nitrogen adsorption method was 10.1 m 2 / g.
- the obtained white powder was put in an alumina crucible and baked at 800 ° C. for 1 hour in the air using an electric furnace.
- the product phase was a mixed phase of ⁇ phase and ⁇ phase, and the intensity ratio I ⁇ / I ⁇ of the X-ray diffraction peak was 0.17.
- the crystallite size of the ⁇ phase was 24 nm.
- the specific surface area determined by the nitrogen adsorption method was 24.8 m 2 / g.
- the obtained mixed slurry was sprayed using a spray dryer (Palvis Mini Spray GB210-A type, manufactured by Yamato Scientific Co., Ltd.), inlet temperature 185 ° C., atomizing air pressure 1.4 kgf / cm 2 , aspirator flow rate 0.
- a spray dryer Palvis Mini Spray GB210-A type, manufactured by Yamato Scientific Co., Ltd.
- inlet temperature 185 ° C.
- atomizing air pressure 1.4 kgf / cm 2
- aspirator flow rate 0.
- ⁇ -eucryptite fine particles can be obtained at a lower firing temperature than before, so the powder after firing is excellent in pulverization and pulverization properties and is used for printed wiring boards and semiconductor encapsulants. It is useful as a filler for improving the insulation of resin and reducing CTE.
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Abstract
Description
第1観点としては、水溶性リチウム塩、水溶性アルミニウム塩及び透過型電子顕微鏡観察による一次粒子径が2~50nmであるコロイダルシリカをリチウム原子、アルミニウム原子、ケイ素原子のモル比(Li:Al:Si)=1:1:1で含有する混合溶液を50℃以上300℃未満の温度雰囲気に噴霧して乾燥し、その後大気中又は酸化雰囲気中で600~1300℃の温度雰囲気で焼成することを特徴とするβ-ユークリプタイト微粒子の製造方法、
第2観点としては、前記β-ユークリプタイト微粒子において、α相の(121)面のX線回折ピーク強度Iαとβ相の(102)面に帰属するX線回折ピーク強度Iβとの比Iα/Iβが0.05未満であり、且つ結晶子径が80nm未満であることを特徴とする第1観点に記載のβ-ユークリプタイト微粒子の製造方法、
第3観点としては、前記水溶性リチウム塩がリチウムの有機酸塩である第1観点又は第2観点に記載のβ-ユークリプタイト微粒子の製造方法、
第4観点としては、前記水溶性アルミニウム塩がアルミニウムの有機酸塩である第1観点又は第2観点に記載のβ-ユークリプタイト微粒子の製造方法、
第5観点としては、前記リチウムの有機酸塩及び/又はアルミニウムの有機酸塩を構成する有機酸が、クエン酸、シュウ酸、グリコール酸、リンゴ酸、酒石酸、乳酸、マロン酸、コハク酸、ギ酸、酢酸からなる群から選ばれる少なくとも1種である第3観点又は第4観点に記載のβ-ユークリプタイト微粒子の製造方法、である。
リガク社製X線回折装置RINT Ultima+にて、X線源;Cu、電圧;40kV、電流;40mAで、STEP幅;0.04°、積算時間;0.5SEC/STEP、発散スリット1°、発散縦制限スリット10mm、散乱スリット1°、受光スリット0.3mmの条件で測定した。
〔結晶子径の測定〕
各試料のX線回折データを解析ソフトJADEを用いて、シェラーの式に基づいて結晶子径の算出を行なった。α相は(121)面に垂直方向の結晶子径、β相は(102)面に垂直方向の結晶子径を採用した。
〔X線回折強度比〕
各試料のX線回折データにおいて、2θ=22.3~22.5°に出現するα相の最強線(121)面のピーク強度Iαと2θ=25.2~25.4°に出現するβ相の最強線(102)面のピーク強度Iβとの比Iα/Iβにより算出した。
純水750gにクエン酸一水和物(関東化学(株)製、特級、99.5質量%)210.1g(1モル)を溶解し、得られたクエン酸水溶液を撹拌しながら乾燥水酸化アルミニウムゲル(協和化学(株)製、商品名;キョーワード200S、Al2O353.3質量%)95.6g(0.5モル)を添加し、85℃で2時間加熱した。加熱中に水分の一部が揮発したので純水51gを添加して1019.6gに調整した。これをガラス濾紙(アドバンテック製、GA-100)及び定量濾紙(アドバンテック製、No.5C)に通液し、淡黄色透明のクエン酸アルミニウム水溶液を得た。得られたクエン酸アルミニウム水溶液の固形分濃度(Al2O3換算)は5.00質量%であった。
純水734.6gに水酸化リチウム一水和物(関東(株)製、特級、98.0質量%)37.76g(0.9モル)を溶解し、クエン酸一水和物(関東化学(株)製、特級、99.5質量%)63.0g(0.3モル)を添加し、室温下で10分撹拌することにより、クエン酸リチウム水溶液を得た。得られたクエン酸リチウム水溶液の固形分濃度(Li2O換算)は1.60質量%であった。
純水1469.6gにシュウ酸二水和物(関東化学(株)製、特級、99.5質量%)378.8g(3モル)を溶解し、得られたシュウ酸水溶液を撹拌しながら乾燥水酸化アルミニウムゲル(協和化学(株)製、商品名;キョーワード200S、Al2O353.3質量%)191.3g(1モル)を添加し、85℃で2時間加熱した。加熱中に水分の一部が揮発したので純水45gを添加して2039.2gに調整した。これをガラス濾紙(アドバンテック製、GA-100)及び定量濾紙(アドバンテック製、No.5C)に通液し、淡黄色透明のシュウ酸アルミニウム水溶液を得た。得られたシュウ酸アルミニウム水溶液の固形分濃度(Al2O3換算)は5.00質量%であった。
純水819.1gに水酸化リチウム一水和物(関東(株)製、特級、98.0質量%)42.0g(1モル)を溶解し、シュウ酸二水和物(関東化学(株)製、特級、99.5質量%)63.0g(0.5モル)を添加し、室温化で10分撹拌することにより、シュウ酸リチウム水溶液を得た。得られたシュウ酸リチウム水溶液の固形分濃度(Li2O換算)は1.62質量%であった。
純水767.7gにマロン酸(関東化学(株)製、特級、99.5質量%)156.1g(1.5モル)を溶解し、得られたマロン酸水溶液を撹拌しながら乾燥水酸化アルミニウムゲル(協和化学(株)製、商品名;キョーワード200S、Al2O353.3質量%)95.6g(0.5モル)を添加し、85℃で2時間加熱した。加熱中に水分の一部が揮発したので純水45gを添加して1019.6gに調整した。これをガラス濾紙(アドバンテック製、GA-100)及び定量濾紙(アドバンテック製、No.5C)に通液し、淡黄色透明のマロン酸アルミニウム水溶液を得た。得られたマロン酸アルミニウム水溶液の固形分濃度(Al2O3換算)は5.00質量%であった。
純水370.4gに水酸化リチウム一水和物(関東(株)製、特級、98.0質量%)42.0g(1モル)を溶解し、マロン酸(関東化学(株)製、特級、99.5質量%)52.0g(0.5モル)を添加し、室温下で10分間撹拌することにより、マロン酸リチウム水溶液を得た。得られたマロン酸リチウム水溶液の固形分濃度(Li2O換算)は3.22質量%であった。
コロイダルシリカ(スノーテックス(登録商標)OXS、日産化学工業(株)製、シリカ濃度10.5質量%、透過型電子顕微鏡観察による一次粒子径5nm)515.0g(SiO20.9モル)に、製造例1で得られたクエン酸アルミニウム水溶液917.6g(Al2O30.45モル)及び製造例2で得られたクエン酸リチウム水溶液835.4gを添加し、室温下で10分間撹拌した。得られた混合液の比重は1.075、pHは2.8、電気伝導度は15.0mS/cmであった。得られた混合液をスプレードライヤー(パルビスミニスプレーGB210-A型、ヤマト科学(株)製)を使用して、入口温度185℃、アトマイジングエアー圧力1.4kgf/cm2、アスピレーター流量0.50m3/分、混合液の送液速度4g/分の条件にて乾燥を行った。このときの出口温度は80±3℃であった。得られた乾燥粉3.0gをアルミナ坩堝に入れ、電気炉を使用して大気中で800℃の温度で1時間焼成することにより、薄く灰色を帯びた白色粉末0.7gを得た。得られた粉末をX線回折分析により同定したところ、生成相はβ-ユークリプタイトのほぼ単相からなり、X線回折ピークの強度比Iα/Iβは0.01未満であった。β相の結晶子径は62nmであった。窒素吸着法による比表面積は1.6m2/gであった。
大気中で800℃で焼成する前に、電気炉を使用して大気中で500℃の温度で5時間の仮焼成を行った以外は実施例1と同様に行った。得られた白色粉末をX線回折分析により同定したところ、生成相はβ-ユークリプタイトのほぼ単相からなり、X線回折ピークの強度比Iα/Iβは0.01未満であった。β相の結晶子径は61nmであった。窒素吸着法による比表面積は1.3m2/gであった。
コロイダルシリカ(スノーテックス(登録商標)OXS、日産化学工業(株)製、シリカ濃度10.5質量%、透過型電子顕微鏡観察による一次粒子径5nm)572.2g(SiO21モル)に、製造例3で得られたシュウ酸アルミニウム水溶液1019・6g(Al2O30.5モル)及び製造例4で得られたシュウ酸リチウム水溶液924.1g(Li2O0.5モル)添加し、室温下で10分間撹拌した。得られた混合液の比重は1.068、pHは2.0、電気伝導度は22.3mS/cmであった。得られた混合液をスプレードライヤー(パルビスミニスプレーGB210-A型、ヤマト科学(株)製)を使用して、入口温度185℃、アトマイジングエアー圧力1.4kgf/cm2、アスピレーター流量0.50m3/分、混合液の送液速度4g/分の条件にて乾燥を行った。このときの出口温度は80±3℃であった。得られた乾燥粉3.0gをアルミナ坩堝に入れ、電気炉を使用して大気中で800℃の温度で1時間焼成することにより、白色粉末1.1gを得た。得られた白色粉末をX線回折分析により同定したところ、生成相はβ-ユークリプタイトのほぼ単相からなり、X線回折ピークの強度比Iα/Iβは0.02であった。β相の結晶子径は46nmであった。窒素吸着法による比表面積は4.1m2/gであった。
コロイダルシリカ、クエン酸アルミニウム水溶液及びクエン酸リチウム水溶液の混合液をスプレードライヤーで乾燥した後、大気中で1時間焼成する際の温度を900℃とした以外は実施例1と同様に行い、白色粉末0.9gを得た。得られた白色粉末をX線回折分析により同定したところ、生成相はβ-ユークリプタイトのほぼ単相からなり、X線回折ピークの強度比Iα/Iβは0.01未満であった。β相の結晶子径は66nmであった。窒素吸着法による比表面積は1.6m2/gであった。
コロイダルシリカ、シュウ酸アルミニウム水溶液及びシュウ酸リチウム水溶液の混合液をスプレードライヤーで乾燥した後、大気中での焼成を600℃で20時間とした以外は実施例3と同様に行い、白色粉末1.1gを得た。得られた白色粉末をX線回折分析により同定したところ、生成相はβ-ユークリプタイトのほぼ単相からなり、X線回折ピークの強度比Iα/Iβは0.03であった。結晶子径は44nmであった。窒素吸着法による比表面積は7.3m2/gであった。
コロイダルシリカ(スノーテックス(登録商標)OXS、日産化学工業(株)製、シリカ濃度10.5質量%、透過型電子顕微鏡観察による一次粒子径5nm)の代わりに、コロイダルシリカ(スノーテックス(登録商標)OL、日産化学工業(株)製、シリカ濃度40.5質量%、透過型電子顕微鏡観察による一次粒子径42nm)を用いた以外は実施例1と同様に行なった。得られた薄く灰色を帯びた白色粉末をX線回折分析により同定したところ、生成相はβ-ユークリプタイトのほぼ単相からなり、X線回折ピークの強度比Iα/Iβは0.03であった。β相の結晶子径は24nmであった。窒素吸着法による比表面積は24.7m2/gであった。
コロイダルシリカ(スノーテックス(登録商標)OXS、日産化学工業(株)製、シリカ濃度10.5質量%、透過型電子顕微鏡観察による一次粒子径5nm)572.2g(SiO21モル)に、製造例5で得られたマロン酸アルミニウム水溶液1019.6g(Al2O30.5モル)及び製造例6で得られたマロン酸リチウム水溶液464.4g(Li2O0.5モル)添加し、室温下で10分間撹拌した。得られた混合液の比重は1.090、pHは3.83、電気伝導度は15.6mS/cmであった。得られた混合液をスプレードライヤー(パルビスミニスプレーGB210-A型、ヤマト科学(株)製)を使用して、入口温度185℃、アトマイジングエアー圧力1.4kgf/cm2、アスピレーター流量0.50m3/分、混合液の送液速度4g/分の条件にて乾燥を行った。このときの出口温度は80±3℃であった。得られた乾燥粉3.0gをアルミナ坩堝に入れ、電気炉を使用して大気中で500℃の温度で5時間の仮焼成を行い、次いで大気中で800℃の温度で1時間焼成することにより、白色粉末0.8gを得た。得られた白色粉末をX線回折分析により同定したところ、生成相はβ-ユークリプタイトのほぼ単相からなり、X線回折ピークの強度比Iα/Iβは0.04であった。β相の結晶子径は41nmであった。窒素吸着法による比表面積は2.7m2/gであった。
電気炉を用いた大気中での焼成を500℃で5時間の焼成のみとした以外は実施例1と同様に行った。得られた黒色粉末をX線回折分析により同定したところ、ハローパターンが観測され、β-ユークリプタイトの結晶相は確認できなかった。
混合液の乾燥方法をスプレードライヤーの代わりに、混合液をナスフラスコに入れてロータリーエバポレーターを用いて30Torrで減圧乾燥した以外は実施例1と同様に行なった。得られた薄く灰色を帯びた白色粉末をX線回折分析により同定したところ、生成相はα相とβ相との混相であり、X線回折ピークの強度比Iα/Iβは0.13であった。β相の結晶子径は34nmであった。窒素吸着法による比表面積は10.1m2/gであった。
コロイダルシリカ(スノーテックス(登録商標)OXS、日産化学工業(株)製、シリカ濃度10.5質量%、透過型電子顕微鏡観察による一次粒子径5nm)の代わりに、コロイダルシリカ(スノーテックス(登録商標)OZL、日産化学工業(株)製、シリカ濃度35.5質量%、透過型電子顕微鏡観察による一次粒子径80nm)を用いた以外は実施例1と同様に行なった。得られた薄く灰色を帯びた白色粉末をX線回折分析により同定したところ、生成相はα相とβ相との混相であり、X線回折ピークの強度比Iα/Iβは0.08であり、さらにアモルファス相によるハローパターンが観察された。β相の結晶子径は34nmであった。窒素吸着法による比表面積は10.1m2/gであった。
コロイダルシリカ(スノーテックス(登録商標)OXS、日産化学工業(株)製、シリカ濃度10.5質量%、透過型電子顕微鏡観察による一次粒子径5nm)57.2gに、水酸化リチウム一水和物4.20gを純水50gに溶解させた水溶液を添加し、次いで乾燥水酸化アルミニウムゲル(協和化学(株)製、商品名;キョーワード200S、Al2O353.3質量%)9.57gを投入して10分間混合した。得られた混合スラリーをナスフラスコに入れてロータリーエバポレーターを用いて30Torrで減圧乾燥した。得られた白色粉末をアルミナ坩堝に入れ、電気炉を使用して大気中で800℃の温度で1時間焼成した。得られた白色粉末をX線回折分析により同定したところ、生成相はα相とβ相との混相であり、X線回折ピークの強度比Iα/Iβは0.17であった。β相の結晶子径は24nmであった。窒素吸着法による比表面積は24.8m2/gであった。
コロイダルシリカ(スノーテックス(登録商標)OXS、日産化学工業(株)製、シリカ濃度10.5質量%、透過型電子顕微鏡観察による一次粒子径5nm)57.2gに、水酸化リチウム一水和物4.20gを純水50gに溶解させた水溶液を添加し、次いで乾燥水酸化アルミニウムゲル(協和化学(株)製、商品名;キョーワード200S、Al2O353.3質量%)9.57gを投入して10分間混合した。得られた混合スラリーをスプレードライヤー(パルビスミニスプレーGB210-A型、ヤマト科学(株)製)を使用して、入口温度185℃、アトマイジングエアー圧力1.4kgf/cm2、アスピレーター流量0.50m3/分、混合液の送液速度4g/分の条件にて乾燥を行おうとしたところ、直ちにノズルが詰まり噴霧できなかった。
Claims (5)
- 水溶性リチウム塩、水溶性アルミニウム塩及び透過型電子顕微鏡観察による一次粒子径が2~50nmであるコロイダルシリカをリチウム原子、アルミニウム原子、ケイ素原子のモル比(Li:Al:Si)=1:1:1で含有する混合溶液を50℃以上300℃未満の温度雰囲気に噴霧して乾燥し、その後大気中又は酸化雰囲気中で600~1300℃の温度雰囲気で焼成することを特徴とするβ-ユークリプタイト微粒子の製造方法。
- 前記β-ユークリプタイト微粒子において、α相の(121)面のX線回折ピーク強度Iαとβ相の(102)面に帰属するX線回折ピーク強度Iβとの比Iα/Iβが0.05未満であり、且つ結晶子径が80nm未満であることを特徴とする請求項1に記載のβ-ユークリプタイト微粒子の製造方法。
- 前記水溶性リチウム塩がリチウムの有機酸塩である請求項1又は2に記載のβ-ユークリプタイト微粒子の製造方法。
- 前記水溶性アルミニウム塩がアルミニウムの有機酸塩である請求項1又は2に記載のβ-ユークリプタイト微粒子の製造方法。
- 前記リチウムの有機酸塩及び/又はアルミニウムの有機酸塩を構成する有機酸が、クエン酸、シュウ酸、グリコール酸、リンゴ酸、酒石酸、乳酸、マロン酸、コハク酸、ギ酸、酢酸からなる群から選ばれる少なくとも1種である請求項3又は4に記載のβ-ユークリプタイト微粒子の製造方法。
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- 2015-12-16 CN CN201580070577.2A patent/CN107108372A/zh active Pending
- 2015-12-16 WO PCT/JP2015/085295 patent/WO2016117248A1/ja not_active Ceased
- 2015-12-16 EP EP15878937.0A patent/EP3248955A4/en not_active Withdrawn
- 2015-12-16 US US15/543,455 patent/US10232335B2/en not_active Expired - Fee Related
- 2015-12-16 KR KR1020177023125A patent/KR20170105600A/ko not_active Withdrawn
- 2015-12-16 JP JP2016570515A patent/JP6587070B2/ja not_active Expired - Fee Related
- 2015-12-22 TW TW104143191A patent/TW201638008A/zh unknown
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019017435A1 (ja) * | 2017-07-20 | 2019-01-24 | 日産化学株式会社 | 珪酸塩化合物微粒子及びその製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3248955A1 (en) | 2017-11-29 |
| KR20170105600A (ko) | 2017-09-19 |
| CN107108372A (zh) | 2017-08-29 |
| JP6587070B2 (ja) | 2019-10-09 |
| JPWO2016117248A1 (ja) | 2017-11-02 |
| TW201638008A (zh) | 2016-11-01 |
| US10232335B2 (en) | 2019-03-19 |
| EP3248955A4 (en) | 2018-04-18 |
| US20180001292A1 (en) | 2018-01-04 |
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