Perovskite oxide, process for producing the perovskite oxide, piezoelectric body, piezoelectric device, and liquid discharge device

A piezoelectric oxide having a composition expressed by a compositional formula,

• (A,B,C)(D,E,F)O3,
• where each of A, B, C, D, E, and F represents one or more metal elements, A, B, and C represent A-site elements, D, E, and F represent B-site elements, O represents the oxygen atom, the B-site elements D, E, and F are different when two or all of the A-site elements A, B, and C are identical, the A-site elements A, B, and C are different when two or all of the B-site elements D, E, and F are identical, and the ratio of each of the total molar amount of the A-site elements and the total molar amount of the B-site elements to the molar amount of oxygen atoms may deviate from 1:3 within a range in which the composition expressed by the compositional formula (A, B, C) (D, E, F)O3 can form a perovskite structure;
• wherein
• the composition of said perovskite oxide satisfies the conditions (1), (2), (3), and (4),
• 0.98≦TF(P)≦1.01, (1)
• TF(ADO3)>1.0, (2)
• TF(BEO3)<1.0,and (3)
• TF(BEO3)<TF(CFO3)<TF(ADO3), (4)
• where TF(P) is a tolerance factor of the piezoelectric oxide expressed by the compositional formula (A, B, C) (D, E, F)O3, TF (ADO3) is a tolerance factor of a compound expressed by a compositional formula ADO3, TF(BEO3) is a tolerance factor of a compound expressed by a compositional formula BEO3, and TF(CFO3) is a tolerance factor of a compound expressed by a compositional formula CFO3.