Compositions – Piezoelectric – Lead – zirconium – titanium or compound thereof containing
Patent
1995-12-26
1997-02-25
Green, Anthony
Compositions
Piezoelectric
Lead, zirconium, titanium or compound thereof containing
252 629R, 501136, C04B 3549, H01L 4100
Patent
active
056056486
ABSTRACT:
A piezoelectric ceramic having a basic composition expressed by a ternary PbTiO.sub.3 O.sub.3 --PbTiO.sub.3 --PbZrO.sub.3 solid solution, wherein part of the Pb is substituted by Sr, the Pb(Y.sub.0.5 Nb.sub.0.5)O.sub.3 is present in an amount of more than 42 mol % of the ternary solid solution, and the ceramic contains Mn.sub.2 O.sub.3 in an amount of 0.01 wt % or more and less than 0.5 wt %. The piezoelectric ceramic provides a material for a piezoelectric device which operates without substantially varying in output, and thereby mitigates the load on the drive circuit, under a large temperature variation.
REFERENCES:
patent: 3372121 (1968-03-01), Banno
patent: 3468799 (1969-09-01), Kurihara et al.
patent: 4882079 (1989-11-01), Tomita et al.
Matsuoka Hiroshi
Satou Hiroyuki
Satou Yasuyuki
Sawada Yasushi
Yasuda Eturo
Green Anthony
Nippon Soken Inc.
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