Piezoelectric ceramic composition and piezoelectric ceramic...

Details Piezoelectric ceramic composition and piezoelectric ceramic... Piezoelectric ceramic composition and piezoelectric ceramic...

2006-05-23

2006-05-23

Dougherty, Thomas M. (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S320000

Reexamination Certificate

active

07049731

ABSTRACT:
A piezoelectric ceramic composition that is based on a layered bismuth compound composed of Sr, Bi, Nb, oxygen, contains an additional monovalent metallic element. The piezoelectric ceramic composition has an elevated Curie point, is highly reliable at higher temperatures, that is, minimizes the reduction in the piezoelectric effect, and is useful as a material for piezoelectric ceramic devices that contain little or no lead or lead compounds. The layered bismuth compound contains not more than about 0.125 mol and more than 0 mol of the monovalent metallic element for 1 mol of Nb.

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Copy of The People's Republic of China Office Action dated Sep. 16, 2005 (and English translation of same).

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