The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 25, 1997
Filed:
Dec. 26, 1995
Yasuyuki Satou, Niwa-gun, JP;
Hiroshi Matsuoka, Anjo, JP;
Hiroyuki Satou, Anjo, JP;
Eturo Yasuda, Okazaki, JP;
Yasushi Sawada, Chita-gun, JP;
Nippon Soken Inc., Nishio, JP;
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.