Barium titanate powder and method for producing same

Details Barium titanate powder and method for producing same Barium titanate powder and method for producing same

2004-04-22

2011-12-27

Johnson, Edward M (Department: 1736)

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C423S594160

Reexamination Certificate

active

08084014

ABSTRACT:
A barium titanate powder and a method for producing the same are provided. The barium titanate powder comprises a perovskite structure having a ratio c/a of 1.008 or more and ratio d/D of from 1 to 1.5, wherein “c” is a length of the c axis, “a” is a length of the a axis in the perovskite structure, “d” is an average particle diameter and “D” is a equivalent specific surface area diameter. The method of producing a barium titanate powder, comprises the steps of: (1) heating a mixture containing a titanium compound and a barium compound under a gas atmosphere containing a halogen at a temperature of not less than about 200° C. and less than the temperature for generation of barium titanate, (2) calcining the obtained mixture under an atmosphere containing substantially no halogen at a temperature of not lower than the temperature for generation of barium titanate.

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