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:
Sep. 04, 2007
Filed:
Mar. 17, 2005
Masaru Nanao, Tokyo, JP;
Masahito Furukawa, Tokyo, JP;
Hideya Sakamoto, Tokyo, JP;
Takeo Tsukada, Tokyo, JP;
Masaru Nanao, Tokyo, JP;
Masahito Furukawa, Tokyo, JP;
Hideya Sakamoto, Tokyo, JP;
Takeo Tsukada, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A piezoelectric ceramic and a piezoelectric device capable of being fired at a low temperature and improving piezoelectric properties are provided. The piezoelectric ceramic and the piezoelectric device includes Pb[(ZnNb)TiZr]O(where 0.94≦a≦1.02, 1<b≦3, x+y+z=1, 0.05≦x<0.125, 0.275<y≦0.5, 0.375<z≦0.6) or (PbMe)[(ZnNb)TiZr]O(where 0.96≦e≦1.03, 0.01≦f≦0.1, 1<g≦3, u+v+w=1, 0.05≦u<0.125, 0.275<v≦0.5, 0.375<w≦0.6, and Me indicates Sr, Ba or Ca). When an excessive amount of Zn is included, the firing temperature can be lower, and the piezoelectric properties can be improved.