Piezoelectric ceramic compositions

Details Piezoelectric ceramic compositions Piezoelectric ceramic compositions

1975-07-16

1976-12-21

Cooper, Jack

Compositions

Piezoelectric

C04B 3546, C04B 3548

Patent

active

039987485

ABSTRACT:
Piezoelectric ceramic compositions having very high mechanical quality factors, high electromechanical coupling coefficients and high mechanical strength, and comprising the quaternary system Pb(Zn.sub.1/3 Nb.sub.2/3)O.sub.3 -Pb(Sn.sub.1/3 Nb.sub.2/3)O.sub.3 -PbTiO.sub.3 -PbZrO.sub.3 and containing 0.05 to 5 weight % of MnO.sub.2, and further containing at least one oxide selected from the group consisting of Nb.sub.2 O.sub.5 in 0.3 to 3 weight %, WO.sub.3 in 0.1 to 2 weight % and Sb.sub.2 O.sub.3 in 0.1 to 3 weight % are provided.

REFERENCES:
patent: 3372121 (1968-03-01), Banno
patent: 3536625 (1970-10-01), Murakawa et al.
patent: 3830742 (1974-08-01), Nishida et al.

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