Piezoelectric ceramic materials

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H01L 41/18 (2006.01) C04B 35/493 (2006.01) H01L 41/187 (2006.01)

Patent

CA 1228473

TITLE OF THE INVENTION PIEZOELECTRIC CERAMIC MATERIALS ABSTRACT OF THE DISCLOSURE Piezoelectric ceramic materials comprising a ternary fundamental solid solution of 0.5 to 5.0 mole % of Pb(Y1/2Nb1/2)03, 40.0 to 50.0 mol % of PbTiO3, and 45.0 to 59.5 mol % of PbZrO3 are described. In the ceramic materials, part of Pb in the solid solution is substituted with 10.0 to 15.0 mol % of Sr, and at least one member selected from the group consisting of Nb2O5, WO3, La2O3, Bi2O3, Tb4O7, NdO and Pr6O11 is further contained in the solid solution in an amount of 0.1 to 2.0 wt.% of the solid solution.

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