Ferroelectric ceramic material

Details Ferroelectric ceramic material Ferroelectric ceramic material

C - Chemistry, Metallurgy

04

B

31/131, 31/138

C04B 35/01 (2006.01) C04B 35/493 (2006.01) H01B 3/12 (2006.01) H01L 41/187 (2006.01)

Patent

CA 1335932

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.

600773

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