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:
Jun. 21, 2011
Filed:
Apr. 20, 2009
Chiharu Sakaki, Otsu, JP;
Emi Shimomura, Kawasaki, JP;
Motoyoshi Sakai, Yasu, JP;
Motonori Nakamura, Yasu, JP;
Chiharu Sakaki, Otsu, JP;
Emi Shimomura, Kawasaki, JP;
Motoyoshi Sakai, Yasu, JP;
Motonori Nakamura, Yasu, JP;
Murata Manufacturing Co., Ltd., Nagaokakyo-shi, Kyoto-fu, JP;
Abstract
A piezoelectric ceramic which has a large value of coercive electric field and, in addition, which can be fired at low temperatures of 950° C. or lower, is provided. It has a composition represented by PbBiM3{M1(M2Nb)ZrTi}Owhere M1 and M2 represent, independently, at least one of Ni and Zn, and M3 represents at least one of Ba and Sr, 0.05≦a≦0.15, 0<b≦0.075, 0≦(a−2b), 0≦d≦0.1, 0.97≦x≦1.00, 0.020≦y≦0.250, and 0.398≦z≦0.512. It is preferable that M1 represents Ni, and M2 represents at least one of Ni and Zn. Moreover, it is preferable that Ni is in the state of being segregated.