WO2005044773A1 - 水溶媒希土類金属化合物ゾル及びその製造方法、並びにそれを用いたセラミック粉末の製造方法 - Google Patents
水溶媒希土類金属化合物ゾル及びその製造方法、並びにそれを用いたセラミック粉末の製造方法 Download PDFInfo
- Publication number
- WO2005044773A1 WO2005044773A1 PCT/JP2004/014100 JP2004014100W WO2005044773A1 WO 2005044773 A1 WO2005044773 A1 WO 2005044773A1 JP 2004014100 W JP2004014100 W JP 2004014100W WO 2005044773 A1 WO2005044773 A1 WO 2005044773A1
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- rare earth
- earth metal
- metal compound
- carboxylic acid
- producing
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C59/235—Saturated compounds containing more than one carboxyl group
- C07C59/245—Saturated compounds containing more than one carboxyl group containing hydroxy or O-metal groups
- C07C59/265—Citric acid
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
- C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
- C04B35/465—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates
- C04B35/468—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates
- C04B35/4682—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates based on BaTiO3 perovskite phase
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- 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
- C04B35/50—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on rare-earth compounds
-
- 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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/624—Sol-gel processing
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B2235/3225—Yttrium oxide or oxide-forming salts thereof
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/449—Organic acids, e.g. EDTA, citrate, acetate, oxalate
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5454—Particle size related information expressed by the size of the particles or aggregates thereof nanometer sized, i.e. below 100 nm
Definitions
- the present invention relates to an aqueous solvent rare earth metal compound sol, a method for producing the same, and a method for producing a ceramic powder using the same.
- BaTiO has been used as a high dielectric constant dielectric porcelain composition constituting a capacitor.
- Multilayer capacitors are becoming thinner year by year in order to increase their capacitance.
- products with a thickness of several micrometers or less per layer have been commercialized.
- Such multilayer capacitors with increasingly thinner layers require more uniform material than ever before. For that purpose, it is necessary to make the fine particles of the auxiliary component.
- the secondary component be present as a sol (colloidal solution).
- Patent Document 1 proposes a method for producing an organic sol containing a rare earth metal which is one of the subcomponents!
- Patent Document 1 Japanese Patent Publication No. 11-501609
- Patent Document 1 Since the conventional rare earth metal compound sol disclosed in Patent Document 1 is an organic sol, an explosion-proof device is required for its production and use, and it is difficult to keep production costs low. There was a problem.
- the present invention has been made in view of such circumstances, and is a water-solvent rare earth that does not require an explosion-proof device without agglomeration of fine particles of a rare earth metal compound and is easy to handle. It is an object of the present invention to provide a metal-like compound sol and a method for producing the same. Another object of the present invention is to provide a method for producing a ceramic powder capable of producing a ceramic powder in which a rare earth metal element is uniformly dispersed in the ceramic powder. Means for solving the problem
- the aqueous solvent rare earth metal compound sol according to claim 1 of the present invention is an aqueous solvent rare earth metal compound sol obtained by dispersing a rare earth metal compound in water, wherein the rare earth metal compound is: Selected from Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu with a carboxylic acid or carboxylate having at least a carboxylic group
- the carboxylic acid or the carboxylate salt of the carboxylic acid or the carboxylate salt has a molar ratio (carbyl group Z rare earth metal) of at least one kind of rare earth metal in the range of 1.2 to 13; Is characterized in that:
- the aqueous solvent rare earth metal compound sol according to claim 2 of the present invention is characterized in that, in the invention of claim 1, the carboxylic acid or the carboxylate is citric acid or citrate. It is assumed that.
- the method for producing a sol of a rare earth metal compound in an aqueous solvent according to claim 3 of the present invention includes the steps of: Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Preparing an aqueous or acidic aqueous solution of at least one rare earth metal selected from Er, Tm, Yb, and Lu, or an aqueous dispersion in which a hydroxide of the rare earth metal is dispersed; In the above solution, a carboxylic acid or a carboxylate having three or more carboxy groups is prepared, and the molar ratio of the carbonyl group to the rare earth metal (carbonyl group Z rare earth metal) is in the range of 1.2 to 3. And a step of adding as described above.
- the method for producing a water-solvent rare earth metal compound sol according to claim 4 of the present invention the method according to claim 3, wherein the carboxylic acid or the carboxylate is citric acid or It is a citrate.
- a method for producing a ceramic powder according to claim 5 of the present invention is characterized in that the aqueous solvent rare earth metal compound sol according to claim 1 or claim 2 is used as an auxiliary component raw material. It is.
- a method for producing a ceramic powder capable of producing a ceramic powder in which a rare earth metal element is uniformly dispersed in the ceramic powder is also provided. be able to.
- a rare earth metal compound as a raw material is prepared as a liquid.
- This liquid may be an acidic aqueous solution or an alkaline aqueous solution.
- an aqueous dispersion in which a hydroxide is dispersed in water may be used.
- the carboxylic acid or carboxylate having three or more carboxy groups is converted to a carboxylic acid or a carboxylate having a molar ratio of the carboxy group to the rare earth metal (carbonyl group Z rare earth metal) of 1 or more. Add so that it is in the range of 2-3. Heating may be used to accelerate the reaction.
- a polymer is formed in which the rare earth metal ion and the carboxylic acid are combined. If the size of this multimer is appropriate, it becomes a water-solvent rare earth metal compound sol (hereinafter simply referred to as “sol”), but if it is too large, precipitation occurs and the liquid becomes cloudy. If the solution becomes cloudy, adjust the pH of the solution by adding ammonia water. By increasing the pH of the solution, the binding of the multimer is appropriately cleaved and no precipitation occurs! That is, the liquid becomes a sol. In order to form a sol without forming a precipitate, the average particle size must be approximately 150 nm or less. At this point, the viscosity of the solution may increase (gelation). In such a case, dilute with pure water.
- sol water-solvent rare earth metal compound sol
- the carboxylic acid or carboxylate salt to be added has only one or two carboxylic groups, the stability of the complex consisting of the rare earth metal ion and the carboxylic acid is insufficient. Therefore, the sol, which is a multimer thereof, is also unstable and precipitates hydroxide.
- carboxylic acid or a carboxylic acid salt having three or more carboxylic groups When a carboxylic acid or a carboxylic acid salt having three or more carboxylic groups is used, the stability of the complex is good, that is, the sol is also stable, and precipitation of the hydroxylated product does not occur.
- carboxylic acids or carboxylate salts citric acid or citrate salts are preferred because they have high solubility in water and can produce sols with high yield.
- the molar ratio of the carboxylic acid group or carboxylate having three or more carboxylic acid groups to the rare earth metal is less than 1.2, the water of the rare earth metal If the molar ratio exceeds 3, a sol will not be formed by the solution and the sol will not be formed, and there is a fear that the sol will be precipitated.
- a main component such as BaTiO and a sol as a sub-component material are mixed.
- BaTiO or the like is placed in a container with a propeller inside.
- the method for producing a ceramic powder of the present invention can also be used for producing a ceramic powder used as a material for an electronic component other than the multilayer capacitor.
- the surface of the green compact of the ceramic powder is analyzed for rare earth metals with a wavelength dispersive X-ray microanalyzer.
- the measurement area is a square with a side of 81.92 / zm. This area is divided into 65536 (256 X 256), and the characteristic X-ray intensity at each point is measured.
- the intensity distribution becomes a normal distribution, and the average value and the median value should match. However, if there is a bias, the number of measurement points with higher intensity than the average value increases, and the median value becomes higher than the average value. If the intensity ratio is defined as the median Z-average value, the closer this value is to 1, the more uniformly the analytical elements are distributed.
- Example number 2 The same operation as in Example 1 was performed using an yttrium nitrate aqueous solution, and a colorless and transparent sol was obtained (sample number 2).
- Aqueous ammonia was added to the aqueous solution of dysprosium nitrate, and the resulting precipitate was filtered and washed with water, to thereby obtain a hydroxide dispersion powder, which was dispersed in pure water to obtain an aqueous dispersion. While this solution was well stirred at room temperature, 0.75 mol of triammonium catenate was added to 1 mol of disposable system. Since a part of the unreacted hydroxylated distillate remained, it was filtered through a No. 5C quantitative filter paper to obtain a pale yellow sol (Sample No. 5).
- the amount of triammonium citrate to be added is 0.40 mol (1.20 mol as a carboxyl group) or 0.45 mol (carboyl group) per mol of holmium. 1.35 mol), 0.50 mol (1.50 mol for the carboyl group), 0.80 mol (2.40 mol for the carboyl group), or 1.00 mol (carboyl
- the same operation as in Example 1 was performed to obtain a pale red transparent sol (Sample Nos. 7-11).
- the sol had almost no fluidity (gelation) and required dilution with pure water.
- the amount of carbonyl groups per mole of rare earth metal is preferably 1.5 moles or more.
- the amount of triammonium citrate to be added is 0.20 mol (0.60 mol as a carbon group) or 1.10 mol (carbon) per mol of holmium.
- Table 1 summarizes the above results.
- the average particle size was measured by an ultrasonic attenuation method using DT-1200 manufactured by Otsuka Electronics. Also manufactured by mixing liquids of sample numbers 10, 26 and 27 with BaTiO
- Table 2 shows the deviation ratio, intensity ratio, and uniform region calculated by measuring the distribution of rare earth metal elements of the obtained ceramic powder with a wavelength dispersive X-ray microanalyzer.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/569,275 US20070010587A1 (en) | 2003-10-09 | 2004-09-27 | Rare earth metal compound in aqueous solvent, method for producing same, and method for producing ceramic powder using same |
JP2005515238A JP4548340B2 (ja) | 2003-10-09 | 2004-09-27 | 水溶媒希土類金属化合物ゾル及びその製造方法、並びにそれを用いたセラミック粉末の製造方法 |
US12/559,738 US8592491B2 (en) | 2003-10-09 | 2009-09-15 | Water-based rare earth metal compound sol, manufacturing method thereof, and method for manufacturing ceramic powder using the same |
Applications Claiming Priority (2)
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---|---|---|---|
JP2003-351173 | 2003-10-09 | ||
JP2003351173 | 2003-10-09 |
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Application Number | Title | Priority Date | Filing Date |
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US10569275 A-371-Of-International | 2004-09-27 | ||
US12/559,738 Division US8592491B2 (en) | 2003-10-09 | 2009-09-15 | Water-based rare earth metal compound sol, manufacturing method thereof, and method for manufacturing ceramic powder using the same |
Publications (1)
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WO2005044773A1 true WO2005044773A1 (ja) | 2005-05-19 |
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PCT/JP2004/014100 WO2005044773A1 (ja) | 2003-10-09 | 2004-09-27 | 水溶媒希土類金属化合物ゾル及びその製造方法、並びにそれを用いたセラミック粉末の製造方法 |
Country Status (6)
Country | Link |
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US (2) | US20070010587A1 (ja) |
JP (1) | JP4548340B2 (ja) |
KR (1) | KR100662201B1 (ja) |
CN (1) | CN100473637C (ja) |
TW (1) | TWI286994B (ja) |
WO (1) | WO2005044773A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011051851A (ja) * | 2009-09-03 | 2011-03-17 | Hitachi Chem Co Ltd | 希土類フッ化物微粒子分散液、この分散液の製造方法、この分散液を用いた希土類フッ化物薄膜の製造方法、この分散液を用いた高分子化合物/希土類フッ化物複合フィルムの製造方法、及び、この分散液を用いた希土類焼結磁石 |
JP2011246331A (ja) * | 2010-05-31 | 2011-12-08 | Gifu Univ | 酸化イットリウム前駆体水系ゾルの製造方法及び酸化イットリウム前駆体水系ゾル |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100473637C (zh) * | 2003-10-09 | 2009-04-01 | 株式会社村田制作所 | 水性溶剂中的稀土金属化合物溶胶、其生产方法以及使用该溶胶生产陶瓷粉末的方法 |
CN106830067B (zh) * | 2017-04-25 | 2018-11-13 | 安徽中创电子信息材料有限公司 | 一种制取氢氧化钛溶胶的生产装置 |
CN106865603B (zh) * | 2017-04-25 | 2018-11-20 | 安徽中创电子信息材料有限公司 | 一种用于制取氢氧化钛溶液的装置 |
Citations (1)
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US20020132725A1 (en) * | 2001-03-13 | 2002-09-19 | Labarge William J. | Alkaline earth / rare earth lean NOx catalyst |
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US5535811A (en) * | 1987-01-28 | 1996-07-16 | Remet Corporation | Ceramic shell compositions for casting of reactive metals |
US5407618A (en) * | 1990-08-13 | 1995-04-18 | The Boeing Company | Method for producing ceramic oxide compounds |
US5225126A (en) * | 1991-10-03 | 1993-07-06 | Alfred University | Piezoresistive sensor |
US5417887A (en) * | 1993-05-18 | 1995-05-23 | The Dow Chemical Company | Reduced viscosity, organic liquid slurries of aluminum nitride powder |
US5624604A (en) * | 1994-05-09 | 1997-04-29 | Yasrebi; Mehrdad | Method for stabilizing ceramic suspensions |
JPH07309622A (ja) * | 1994-05-18 | 1995-11-28 | Shin Etsu Chem Co Ltd | 希土類元素酸化物微粉の製造方法 |
FR2734560B1 (fr) * | 1995-05-24 | 1997-08-14 | Rhone Poulenc Chimie | Compose a base d'yttrium ou d'holmium redispersible sous forme d'un sol |
FR2741281B1 (fr) | 1995-11-22 | 1998-02-13 | Rhone Poulenc Chimie | Sol organique comportant au moins un compose oxygene de terre(s) rare(s), procede de synthese du dit sol et utilisation du dit sol pour la catalyse |
CN1065560C (zh) | 1996-04-18 | 2001-05-09 | 天津石油化工公司研究所 | Co助燃剂及其制备方法 |
FR2801299B1 (fr) * | 1999-11-23 | 2002-06-07 | Rhodia Terres Rares | Dispersion colloidale aqueuse a base d'au moins un compose d'un lanthanide et d'un complexant, procede de preparation et utilisation |
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CN100473637C (zh) * | 2003-10-09 | 2009-04-01 | 株式会社村田制作所 | 水性溶剂中的稀土金属化合物溶胶、其生产方法以及使用该溶胶生产陶瓷粉末的方法 |
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2004
- 2004-09-27 CN CNB2004800232427A patent/CN100473637C/zh active Active
- 2004-09-27 WO PCT/JP2004/014100 patent/WO2005044773A1/ja active IP Right Grant
- 2004-09-27 JP JP2005515238A patent/JP4548340B2/ja active Active
- 2004-09-27 US US10/569,275 patent/US20070010587A1/en not_active Abandoned
- 2004-09-27 KR KR1020067002953A patent/KR100662201B1/ko active IP Right Grant
- 2004-10-05 TW TW093130169A patent/TWI286994B/zh active
-
2009
- 2009-09-15 US US12/559,738 patent/US8592491B2/en active Active
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2011051851A (ja) * | 2009-09-03 | 2011-03-17 | Hitachi Chem Co Ltd | 希土類フッ化物微粒子分散液、この分散液の製造方法、この分散液を用いた希土類フッ化物薄膜の製造方法、この分散液を用いた高分子化合物/希土類フッ化物複合フィルムの製造方法、及び、この分散液を用いた希土類焼結磁石 |
JP2011246331A (ja) * | 2010-05-31 | 2011-12-08 | Gifu Univ | 酸化イットリウム前駆体水系ゾルの製造方法及び酸化イットリウム前駆体水系ゾル |
Also Published As
Publication number | Publication date |
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CN100473637C (zh) | 2009-04-01 |
US8592491B2 (en) | 2013-11-26 |
TW200530126A (en) | 2005-09-16 |
KR100662201B1 (ko) | 2006-12-27 |
JP4548340B2 (ja) | 2010-09-22 |
CN1835905A (zh) | 2006-09-20 |
TWI286994B (en) | 2007-09-21 |
US20070010587A1 (en) | 2007-01-11 |
US20100004116A1 (en) | 2010-01-07 |
KR20060052981A (ko) | 2006-05-19 |
JPWO2005044773A1 (ja) | 2007-11-29 |
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