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:
May. 17, 2011
Filed:
Oct. 29, 2009
Masahiko Kimura, Kusatsu, JP;
Masahiko Kimura, Kusatsu, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
A piezoelectric ceramic composition contains main components represented by a general formula of [(PbCaSr){Ti(ZnW)}O], and x, y, and z satisfy 0≦x≦0.2 (preferably 0≦x≦0.15), 0≦y≦0.2 (preferably 0≦y≦0.1), 0.1≦x+y≦0.2, and 0.04≦z≦0.1. It is also preferable that the piezoelectric ceramic composition contains 0.05 weight part to 1.0 weight part of a Mn component calculated in terms of MnCOwith respect to 100 weight parts of the main component. A piezoelectric part includes a piezoelectric ceramic element that is formed by the piezoelectric ceramic composition. It is thereby possible to realize a piezoelectric ceramic composition that can be fired at low temperature, that has a high Curie point Tc resistant to a reflow heating treatment on a lead-free solder, and that exhibits satisfactory piezoelectricity, and a piezoelectric part using this piezoelectric ceramic composition.