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:
Jul. 23, 2002
Filed:
Aug. 16, 2000
Applicant:
Inventors:
Takuya Sawada, Moriyama, JP;
Masahiko Kimura, Kusatsu, JP;
Akira Ando, Omihachiman, JP;
Koichi Hayashi, Shiga-ken, JP;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
H01B 3/12 ; H01G 4/12 ; H01L 4/100 ; H03H 9/00 ;
U.S. Cl.
CPC ...
H01B 3/12 ; H01G 4/12 ; H01L 4/100 ; H03H 9/00 ;
Abstract
A piezoelectric ceramic composition mainly contains a component of the formula SrBi Nb O and includes at least a trivalent metallic element other than Bi constituting the main component in a proportion of more than 0 mol and equal to or less than about 0.15 mol relative to 1 mol of Bi in the main component. This piezoelectric ceramic composition mainly containing SrBi Nb O is useful as a material for a piezoelectric ceramic device having an improved temperature-dependent factor of resonant frequency. Such a satisfactory piezoelectric ceramic device is also provided using this piezoelectric ceramic composition.