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Ceramic particle group and method for production thereof and use thereof UPDATE 実績あり

外国特許コード F110005390
整理番号 K02014WO
掲載日 2011年9月5日
出願国 アメリカ合衆国
出願番号 66262905
公報番号 20070259181
公報番号 7749429
出願日 平成17年9月13日(2005.9.13)
公報発行日 平成19年11月8日(2007.11.8)
公報発行日 平成22年7月6日(2010.7.6)
国際出願番号 JP2005016837
国際公開番号 WO2006030782
国際出願日 平成17年9月13日(2005.9.13)
国際公開日 平成18年3月23日(2006.3.23)
優先権データ
  • 特願2004-267404 (2004.9.14) JP
  • 特願2005-041348 (2005.2.17) JP
  • 2005WO-JP16837 (2005.9.13) WO
発明の名称 (英語) Ceramic particle group and method for production thereof and use thereof UPDATE 実績あり
発明の概要(英語) (US7749429)
A ceramic particle group dispersed in a solvent in a state of primary particles of single crystal, a method for production thereof and a use thereof are disclosed.
In one embodiment a method is disclosed for producing a sintered particle (ceramic particle) group of hydroxyapatite (HAp), which includes a step of subjecting a system wherein calcium carbonate is present between primary particles of hydroxyapatite (HAp) to sintering and then dissolving calcium carbonate with water to remove calcium carbonate.
A hydroxyapatite (HAp) sintered particle group produced by the above method is a nanometer size particle group having a particle diameter of about 70 to about 120 nm, and is a particle group having a uniform particle diameter (coefficient of variation: 12%), and further 96% of the particle group is dispersed as a single crystal particle.
特許請求の範囲(英語) [claim1]
1. A method for producing a ceramic particle group, comprising: mixing ceramic particles of ceramic material with an anti-fusing agent, so as to place the anti-fusing agent between the primary particles of ceramic material to be subjected to sintering;
sintering the mixed particles; and
removing the anti-fusing agent after sintering the mixed particles.
[claim2]
2. A method as set forth in claim 1, wherein mixing the ceramic particles further comprises: mixing the primary particles with a solution that contains a high-molecular compound having any of a carboxyl group, a sulfuric acid group, a sulfonic acid group, a phosphoric acid group, a phosphonic acid group, and an amino group on side chains; and,
adding metal salts to the mixture of the primary particles and the high-molecular compound.
[claim3]
3. A method as set forth in claim 2, wherein the high-molecular compound is at least one kind of substance selected from the group consisting of: poly(acrylic acid), poly(methacrylic acid), poly(glutamic acid), poly(ethylene sulfonic acid), poly(sulfoalkyl methacrylate), poly(acrylamido-N-methylphosphonic acid), and polypeptide.
[claim4]
4. A method as set forth in claim 1, wherein the anti-fusing agent is non-volatile at a sintering temperature during sintering of the mixed particles.
[claim5]
5. A method as set forth in claim 1, wherein removing the anti-fusing agent includes dissolving the anti-fusing agent in a solvent.
[claim6]
6. A method as set forth in claim 5, wherein the solvent used in removing the anti-fusing agent dissolves the anti-fusing agent but does not dissolve the ceramic particles.
[claim7]
7. A method as set forth in claim 5, wherein the anti-fusing agent is soluble in an aqueous solvent.
[claim8]
8. A method as set forth in claim 5, wherein the anti-fusing agent is calcium carbonate.
[claim9]
9. A method as set forth in claim 1, further comprising: generating primary particles before mixing the ceramic particles.
[claim10]
10. A method as set forth in claim 9, wherein the primary particles generated have a particle diameter in a range of 10 nm to 500 nm.
[claim11]
11. A method as set forth in claim 9, wherein a coefficient of variation of particle diameter of a primary particle group comprised of the primary particles generated is no greater than 20%.
  • 発明者/出願人(英語)
  • FURUZONO TSUTOMU
  • OKADA MASAHIRO
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
参考情報 (研究プロジェクト等) PRESTO Nanostructure and Material Property AREA
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