FERROELECTRIC CERAMIC MATERIAL

摘要

Disclosed herein is a ferroelectric ceramic material which is a Perovskite solid solution comprising a solid solution represented by the formula: Pb1-a Ma(Mg1/3 Nb2/3)x Tiy Zrz O3 (wherein M is Ba or Sr, x + y + z is 1, a is from 0 to 0.10, x is from 0.05 to 0.70, y is from 0.25 to 0.50 and z is from 0.05 to 0.70), at least one oxide selected from Group A : La2O3 and Nd2O3; and at least one oxide selected from Group B : ZnO, SnO2 and Ta2O5. The ferroelectric ceramic material has a large piezoelectric strain constant d. Also disclosed is a ferroelectric ceramic which is a Perovskite solid solution comprising a solid solution represented by the formula Pb1-a Ma(Mg1/3 Nb2/3)x Tiy Zrz O3 (wherein the symbols have the meanings given above), at least one oxide selected from Group A: La2O3 and Nd2O3; and at least one oxide selected from Group B : ZnO and SnO2, the solid solution further containing MnO2.