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Ceramic particle group comprising sintered particles of hydroxyapatite achieved

Foreign code F110005389
File No. K02014US2
Posted date Sep 5, 2011
Country United States of America
Application number 65968810
Gazette No. 20100173158
Gazette No. 8153255
Date of filing Mar 17, 2010
Gazette Date Jul 8, 2010
Gazette Date Apr 10, 2012
International application number JP2005016837
International publication number WO2006030782
Date of international filing Sep 13, 2005
Date of international publication Mar 23, 2006
Priority data
  • P2004-267404 (Sep 14, 2004) JP
  • P2005-041348 (Feb 17, 2005) JP
  • 2005WO-JP16837 (Sep 13, 2005) WO
  • 2007US-11662629 (Mar 13, 2007) US
Title Ceramic particle group comprising sintered particles of hydroxyapatite achieved
Abstract (US8153255)
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.
Scope of claims [claim1]
1. A ceramic particle group comprised of granular ceramic particles: wherein a majority of the ceramic particles in the ceramic particle group are monocrystalline primary particles, which are either primary particles of single crystal, or a cluster of primary particles of single crystal that are held together by ionic interactions;
wherein a proportion of the monocrystalline primary particles contained in the ceramic particle group is no less than 70%;
wherein the ceramic particles have a particle diameter in a range of 10 nm to 700 nm;
wherein a coefficient of variation of particle diameter of the ceramic particle group is no greater than 20%; and
wherein the ceramic particles comprise sintered particles of hydroxyapatite.
[claim2]
2. A chromatography filler, which comprises a ceramic particle group of claim 1.
[claim3]
3. A dental or medical material, which comprises a ceramic particle group of claim 1.
[claim4]
4. A cosmetic additive which comprises a ceramic particle group of claim 1.
[claim5]
5. A building material, which comprises a ceramic particle group of claim 1.
[claim6]
6. An industrial material, which comprises a ceramic particle group of claim 1.
  • Inventor, and Inventor/Applicant
  • FURUZONO TSUTOMU
  • OKADA MASAHIRO
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
IPC(International Patent Classification)
Reference ( R and D project ) PRESTO Nanostructure and Material Property AREA
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