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:
Apr. 24, 2001
Filed:
Mar. 22, 1999
Applicant:
Inventors:
Junichi Watanabe, Saitama-ken, JP;
Hiromi Kikuchi, Saitama-ken, JP;
Hideko Fukushima, Saitama-ken, JP;
Shigeru Jomura, Tottori-ken, JP;
Assignee:
Hitachi Metals, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01L 4/1187 ; H01L 4/1107 ; H02M 3/24 ;
U.S. Cl.
CPC ...
H01L 4/1187 ; H01L 4/1107 ; H02M 3/24 ;
Abstract
A piezoelectric sintered ceramic made of (a) 100 parts by weight of main components having a composition represented by the general formula: (Pb,M,)(Zr,Ti,)O,, wherein M is at least one element selected from the group consisting of Sr, Ba and Ca, and y and z are numbers satisfying 0.01≦y≦0.10, and 0.51≦z≦0.56, respectively; (b) 0.05-1.0 parts by weight, as Fe,O,, of Fe; and (c) 10-1000 ppm of Ag.