US 12,240,764 B2
Method for producing perovskite compound, and perovskite compound
Takahiro Kawataki, Osaka (JP); Hideto Mizutani, Osaka (JP); and Seiichi Yano, Osaka (JP)
Assigned to Sakai Chemical Industry Co., Ltd., Osaka (JP)
Appl. No. 17/912,738
Filed by SAKAI CHEMICAL INDUSTRY CO., LTD., Sakai (JP)
PCT Filed Feb. 10, 2021, PCT No. PCT/JP2021/005023
§ 371(c)(1), (2) Date Sep. 19, 2022,
PCT Pub. No. WO2021/199702, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 2020-060818 (JP), filed on Mar. 30, 2020.
Prior Publication US 2023/0212023 A1, Jul. 6, 2023
Int. Cl. C01G 23/00 (2006.01); H01G 4/12 (2006.01)
CPC C01G 23/006 (2013.01) [H01G 4/1227 (2013.01); C01P 2002/34 (2013.01); C01P 2002/52 (2013.01); C01P 2002/72 (2013.01); C01P 2002/85 (2013.01); C01P 2004/03 (2013.01); C01P 2004/04 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A method of producing a perovskite compound represented by the following formula (1):
Ba(1-x)AxTiO3  (1)
wherein A represents Ca or Sr, and x is a number satisfying 0.00<x≤0.30,
the method comprising:
acid washing barium titanate so as to obtain barium titanate having a ratio of barium element to titanium element of lower than 1.00;
mixing the barium titanate having a ratio of barium element to titanium element of lower than 1.00 obtained in the acid washing, and a calcium salt or a strontium salt;
drying the mixture so as to obtain a dry mixture; and
heating the dry mixture so as to obtain the perovskite compound.