Piezoelectric ceramic materials

Details Piezoelectric ceramic materials Piezoelectric ceramic materials

1987-12-23

1989-11-21

Cooper, Jack

Compositions

Piezoelectric

501135, 501136, C04B 3549

Patent

active

048820792

ABSTRACT:
Piezoelectric ceramic materials comprising a ternary fundamental solid solution of 0.5 to 5.0 mol % of Pb(Y.sub.1/2 Nb.sub.1/2)O.sub.3, 40.0 to 50.0 mol % of PbTiO.sub.3, and 45.0 to 59.5 mol % of PbZrO.sub.3 are described. In the ceramic materials, part of Pb in the solid solution is substituted with 5.0 to 15.0 mol % of Sr, and at least one member selected from the group consisting of Nb.sub.2 O.sub.5, WO.sub.3, La.sub.2 O.sub.3, TaO.sub.3, Bi.sub.2 O.sub.3, Tb.sub.4 O.sub.7, NdO and Pr.sub.6 O.sub.11 is further contained in the solid solution in an amount of 0.1 to 2.0 wt % of the solid solution.

REFERENCES:
patent: 2911370 (1959-11-01), Kulcsar
patent: 3372121 (1968-03-01), Banno
patent: 3468799 (1969-09-01), Kurihara et al.
patent: 3630909 (1971-12-01), Banno et al.

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