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:
Dec. 19, 2006
Filed:
Mar. 19, 2003
Tatsuhiko Nonoyama, Chiryu, JP;
Toshiatsu Nagaya, Kuwana, JP;
Yasuyoshi Saito, Toyota, JP;
Kazumasa Takatori, Nagoya, JP;
Hisaaki Takao, Seto, JP;
Takahiko Homma, Owariasahi, JP;
Tatsuhiko Nonoyama, Chiryu, JP;
Toshiatsu Nagaya, Kuwana, JP;
Yasuyoshi Saito, Toyota, JP;
Kazumasa Takatori, Nagoya, JP;
Hisaaki Takao, Seto, JP;
Takahiko Homma, Owariasahi, JP;
Denso Corporation, Kariya, JP;
Abstract
This invention provides a piezoelectric ceramic composition that does not contain lead, can be sintered at a normal pressure and has a high electro-mechanical coupling coefficient and a small dielectric loss, its production method, and a piezoelectric device utilizing the piezoelectric ceramic composition. The invention relates to a piezoelectric composition containing a compound expressed by the general formula {Li(KNa)}(NbTa)O, each of x, y and z respectively falling within composition range of 0≦x≦0.2, 0≦y≦1.0 and 0≦z≦0.4, as its main component, and further containing nickel or a nickel-containing compound. To provide a piezoelectric device that does not contain lead, can be sintered at a normal pressure and has a high electro-mechanical coupling coefficient Kp and a small dielectric loss, the piezoelectric ceramic composition of the invention is expressed by the general formula {Li(KNa)}(NbTa(MnW)O, each of x, y, z and n respectively falling within a composition range of 0≦x≦0.2, 0≦y≦1.0, 0≦z≦0.4 and 0<n≦0.1.