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:
Mar. 06, 2012
Filed:
Jun. 15, 2009
Masahiko Kimura, Kusatsu, JP;
Kosuke Shiratsuyu, Omihachiman, JP;
Masahiko Kimura, Kusatsu, JP;
Kosuke Shiratsuyu, Omihachiman, JP;
Murata Manufacturing Co., Ltd., Nagaokakyo-Shi, Kyoto-fu, JP;
Abstract
A piezoelectric ceramic composition includes a main component represented by general formula {(PbCaSr) {Ti(NiNb)}O}, wherein 0≦x≦0.2 (preferably 0≦x≦0.15), 0≦y≦0.2 (preferably 0≦y≦0.1), 0.05≦x+y≦0.2, and 0.02≦z≦0.1. Furthermore, a Mn component is preferably present in an amount of 1.0 part by weight or less (excluding zero) (more preferably 0.05 to 1.0 part by weight) in terms of MnCOwith respect to 100 parts by weight of the main component. A piezoelectric element includes a piezoelectric ceramic body composed of this piezoelectric ceramic composition. Firing can be performed at a low temperature of about 1,100° C. The piezoelectric element has a high Curie point Tc, can withstand solder reflow treatment, and achieves satisfactory piezoelectric properties.