Piezoelectric oxide material

Details Piezoelectric oxide material Piezoelectric oxide material

1981-02-18

1982-03-23

Cooper, Jack

Compositions

Piezoelectric

C04B 3546

Patent

active

043211550

ABSTRACT:
A piezoelectric oxide material suitable for an ultrasonic probe is provided. The piezoelectric material has the general formula ##EQU1## wherein 0.01.ltoreq.X.ltoreq.0.10 and 0.20.gtoreq.a.ltoreq.0.35, to which is added, as an additive, 0.05 to 2.0% by weight of at least one of MnO, NiO and Fe.sub.2 O.sub.3 based on the total content of the basic composition; the thickness coupling factor (Kt) is 50% or more; the ratio (Kt/Kp) of the thickness coupling factor (Kt) to the planar coupling factor (Kp) is 10 or more.

REFERENCES:
patent: 3630909 (1971-12-01), Banno et al.
patent: 4224174 (1980-09-01), Okuma et al.
patent: 4228482 (1980-10-01), Bouchard et al.
Journal of The American Ceramic Society--Hiromu Ouchi--vol. 51, No. 3, pp. 169-176, Mar. (1968) "Pb(Mg.Nb)O.sub.3 -PbTiO.sub.3 -PbZrO.sub.3 Ceramic with Ba or Sr Substitute".

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