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. 11, 2007
Filed:
Mar. 19, 2003
Tatsuhiko Nonoyama, Chiryu, JP;
Toshiatsu Nagaya, Kuwana, JP;
Yasuyoshi Saito, Toyota, JP;
Kazumasa Takatori, Nagoya, JP;
Takahiko Homma, Owariasahi, JP;
Hisaaki Takao, Seto, JP;
Tatsuhiko Nonoyama, Chiryu, JP;
Toshiatsu Nagaya, Kuwana, JP;
Yasuyoshi Saito, Toyota, JP;
Kazumasa Takatori, Nagoya, JP;
Takahiko Homma, Owariasahi, JP;
Hisaaki Takao, Seto, JP;
DENSO CORPORATION, Kariya, Aichi-Pref, JP;
Abstract
This invention provides a piezoelectric ceramic composition that does not contain lead, can be sintered at a normal pressure and is excellent in at least one of a piezoelectric constant, an electro-mechanical coupling coefficient, a dielectric loss, a relative dielectric constant and a Curie point, its production method, and a piezoelectric device and a dielectric device each utilizing the piezoelectric ceramic composition. The invention relates to a piezoelectric composition expressed by the general formula {Li(KNa)}(NbSb)O, each of x, y and z respectively falling within composition ranges of 0≦x≦0.2, 0≦y≦1.0 and 0≦z≦0.2 (with the exception of x=z=0), and its production method. The invention further relates to a piezoelectric device having a piezoelectric body formed of the piezoelectric ceramic composition described above and a dielectric device having a dielectric body formed of the piezoelectric ceramic composition described above.