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. 17, 2009
Filed:
Mar. 16, 2007
Shinichiro Kawada, Hikone, JP;
Katsuhiro Horikawa, Shiga-ken, JP;
Shinichiro Kawada, Hikone, JP;
Katsuhiro Horikawa, Shiga-ken, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
A piezoelectric ceramic composition is represented by [(PbX){(NiNb)TiZr}O] in which X is at least one of Sr, Ba, Ca and La), and the compositional amounts x, a, b, c, and d respectively satisfy 0.001≦x≦0.1, 0.930≦a≦0.998, 1.02≦b≦1.40, 0.1≦c≦0.6 and 0.3≦d≦0.6. The specific surface area of the material powder before firing is preferably set to 5 m/g or more. A piezoelectric ceramic bodyis fabricated using the piezoelectric ceramic composition. In this manner, a sufficiently high piezoelectric constant can be obtained not only in the electric field range of 400 to 500 V/mm but also in an electric field range of 1 kV/mm or more. Furthermore, a piezoelectric ceramic composition that can be fired at a low-temperature and a piezoelectric ceramic electronic component using this composition can be provided.