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Title:
METHOD FOR PRODUCING PLATY CERIA PARTICLE
Document Type and Number:
Japanese Patent JP2010195599
Kind Code:
A
Abstract:

To provide a method for producing platy ceria particles capable of producing platy ceria particles having high monodisperse capacity, an average primary particle diameter of a sufficient size (e.g. 20 μm or more) and high brightness.

The method for producing platy ceria particles contains a process for obtaining a mixed liquid by mixing a cerium nitrate solution and a sodium hydrogencarbonate solution in a solvent containing water so as to make cerium concentration to be 0.008-0.15 mol/L and sodium concentration to be 0.1-0.4 mol/L, a process for obtaining platy cerium carbonate octahydrate particles of single crystal having an average primary particle diameter of 20-100 μm and an average thickness of 0.2-4 μm by precipitating and growing cerium carbonate particles by maintaining the temperature of the mixed liquid within the range of 10-75°C for 20 hours or more, and a process for obtaining platy ceria particles by calcining the platy cerium carbonate octahydrate particles.


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Inventors:
IN SHU
SATO TSUGIO
MINAMIDATE YOSHIHIRO
Application Number:
JP2009038854A
Publication Date:
September 09, 2010
Filing Date:
February 23, 2009
Export Citation:
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Assignee:
UNIV TOHOKU
International Classes:
C01F17/00; A61K8/19; A61Q17/04
Domestic Patent References:
JPH07172826A1995-07-11
JP2010521406A2010-06-24
JPH11181405A1999-07-06
JP2009508795A2009-03-05
JPH0781932A1995-03-28
Other References:
JPN6013036876; Ｙ．　ＭＩＮＡＭＩＤＡＴＥ　ｅｔ　ａｌ．: 'Ｓｙｎｔｈｅｓｉｓ　ａｎｄ　ｃｈａｒａｃｔｅｒｉｚａｔｉｏｎ　ｏｆ　ｐｌａｔｅ-ｌｉｋｅ　ｃｅｒｉａ　ｐａｒｔｉｃｌｅｓ　ｆｏｒ　ｃｏｓｍｅｔｉｃ　ａｐｐｌｉｃａｔｉｏｎ' Ｍａｔｅｒｉａｌｓ　Ｃｈｅｍｉｓｔｒｙ　ａｎｄ　Ｐｈｙｓｉｃｓ , Ｖｏｌ．　１２３，　Ｐａｇｅｓ　５１６-５２０　（２０１０）
Attorney, Agent or Firm:
Patent Business Corporation St. Crest International Patent Office
Noriaki Nagahama



 
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