Oxide having perovskite structure, barium titanate, and manufacturing method therefor, dielectric ceramic, and ceramic electronic component

摘要

An oxide having a perovskite structure is provided, wherein the amount of OH groups in a crystal lattice of said oxide is less than 0,2% by weight and said oxide is a powder having a particle diameter of 0,03 to 0,2 µm. Preferably the observed value x of the ratio of the a axis to the c axis in the crystal lattice of said oxide and the theoretical value k of the c/a axial ratio of said oxide satisfy a special condition. Said oxide may be barium titanate. Preferably the c/a axial ratio thereof is 1,0033 or more.