| 摘要 |
Disclosed is a ferroelectric ceramic material which is a Perovskite solid solution and is represented by the formula: Pb1-aMa (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). The solid solution contains at least one oxide selected from Group A: La2O3, Bi2O3 and Nd2O3; and at least one oxide selected from Group B: NiO, Fe2O3, SnO2 and Ta2O5, with the proviso that NiO or Fe2O3 must be contained. The ferroelectric ceramic material has a large piezoelectric strain constant d. Also disclosed is a ferroelectric ceramic which is a Perovskite solid solution and is represented by the formula: Pb1-aMa (Mg1/3 Nb2/3)x Tiy Zrz O3 containing in solution at least one oxide selected from the Group A: La2O3, Bi2O3 and Nd2O3; and at least one oxide selected from Group B: NiO, ZnO, Fe2O3, SnO2 and Ta2O5, with the proviso that NiO, Fe2O3 or Ta2O5 must be contained and that the solid solution further contains MnO2.
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