Ceramic particle group and method for production thereof and use thereof
| 外国特許コード | F110005390 |
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| 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 |
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| 発明の名称 （英語） |
Ceramic particle group and method for production thereof and use thereof
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| 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%. |
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| 国際特許分類(IPC) |
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| 参考情報 （研究プロジェクト等） | PRESTO Nanostructure and Material Property AREA |
日本語項目の表示
| 発明の名称 |
セラミック粒子群およびその製造方法並びにその利用
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