BARIUM TITANATE POWDER AND METHOD FOR PRODUCTION THEREOF

Japanese Patent JP2015127292

A

PROBLEM TO BE SOLVED: To provide barium titanate powders having high synthesis degree and large BET specific surface area, being minute and preferably having a so-called single nano-size, and to provide a method for production of such barium titanate powders.SOLUTION: There is provided a method for production of barium titanate powders. The method includes the steps of: adding the water slurry of hydrous titanium oxide having a BET specific surface area of 250 to 500 m/g to the aqueous solution of barium hydroxide in which the concentration of barium hydroxide is controlled in the range of 3.6 to 6.5 mol/L and temperature is retained in the range of 80 to 130°C; and reacting the barium hydroxide with the hydrous titanium oxide in the reaction concentration of barium titanate in the range of 0.7 to 1.1 mol/L to obtain barium titanate. The powdered barium titanate obtained by the above method is characterized in that the BET specific surface area is in the range of 70 to 150 m/g, and the ratio c/D of the crystallite diameter c of (111) plane measured by powder X-ray diffraction to a BET conversion diameter D is in the range of 0.80 to 1.50.

BABA YUJI
YAMANAKA KAZUMI
YONEDA MINORU
KUNIYOSHI YUKIHIRO
OGAMA SHINJI

JP2014238008A

July 09, 2015

November 25, 2014

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SAKAI CHEMICAL INDUSTRY CO

C01G23/00

JP2007246334A	2007-09-27
JP2007137759A	2007-06-07
JPS6374915A	1988-04-05
JP2008513324A	2008-05-01
JP2009269791A	2009-11-19
JP2012062229A	2012-03-29

US20050281733A1

2005-12-22

Ichiro Makino

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