Title:
無定形微粒子粉末、その製造方法およびそれを用いたペロブスカイト型チタン酸バリウム粉末
Document Type and Number:
Japanese Patent JP5270528
Kind Code:
B2
Abstract:
The present invention provides an amorphous fine-particle powder which enables to obtain a fine perovskite-type barium titanate powder free from residual by-products such as barium carbonate and stable in quality, and a method for producing the amorphous fine-particle powder. The amorphous fine-particle powder is a fine-particle powder including titanium, barium, lactic acid and oxalic acid, wherein: the average particle size thereof is 3 μm or less; the BET specific surface area thereof is 6 m2/g or more; the molar ratio (Ba/Ti) of Ba atoms to Ti atoms is 0.98 to 1.02; and the amorphous fine-particle powder is noncrystalline in X-ray diffraction and has a peak of an infrared absorption spectrum in each of a region from 1120 to 1140 cm−1 and a region from 1040 to 1060 cm−1. The method for producing an amorphous fine-particle powder brings a solution (solution A) that contains a titanium component, a barium component and a lactic acid component and a solution (solution B) that contains an oxalic acid component into contact with each other in a solvent that contains an alcohol.
Inventors:
Junya Fukasawa
Application Number:
JP2009500200A
Publication Date:
August 21, 2013
Filing Date:
February 19, 2008
Export Citation:
Assignee:
Nippon Chemical Industry Co., Ltd.
International Classes:
C01G23/00; H01B3/12
Domestic Patent References:
| JPH01294527A | 1989-11-28 | |||
| JPH0259426A | 1990-02-28 |
Foreign References:
| WO2005093763A1 | 2005-10-06 |