Patent ID: 7997692

Claim:
A process for producing a perovskite oxide having a composition expressed by a compositional formula, A(B,C)O 3 , where each of A, B, and C represents one or more metal elements, A represents one or more A-site elements, each of B and C represents one or more B-site elements, O represents oxygen atoms, and the one or more B-site elements represented by B have composition different from the one or more B-site elements represented by C; the one or more A-site elements include bismuth as a main component; and the composition of said perovskite oxide satisfies the conditions (1), (2), and (3), 0.98<TF(PY)<1.01, (1) TF(ABO 3 )>1.0, and (2) TF(ACO 3 )<1.0, (3) where TF(PX) is a tolerance factor of the perovskite oxide expressed by the compositional formula A(B, C)O 3 , TF(ABO 3 ) is a tolerance factor of an oxide expressed by a compositional formula ABO 3 , and TF(ACO 3 ) is a tolerance factor of an oxide expressed by a compositional formula ACO 3 .