Compositions – Piezoelectric
Reexamination Certificate
2011-06-14
2011-06-14
Koslow, C. Melissa (Department: 1734)
Compositions
Piezoelectric
C501S134000
Reexamination Certificate
active
07959823
ABSTRACT:
A piezoelectric ceramic composition including potassium-sodium-lithium niobate, bismuth-sodium titanate and bismuth ferrate is provided. A piezoelectric ceramic obtained by firing the piezoelectric ceramic composition, wherein the electromechanical coupling factor is high, the piezoelectric g33constant, in particular, is large, the second phase transformation does not exist in the temperature range of −40 to 150° C. in at least one of a temperature-dependent variation of a resonance frequency, a temperature-dependent variation of an anti-resonance frequency and a temperature-dependent variation of piezoelectric g33constant, and a good heat-resistant property is obtained, is provided.
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Eguchi Tomonori
Fukuoka Shuichi
Nakakubo Hitoshi
Birch & Stewart Kolasch & Birch, LLP
Koslow C. Melissa
Kyocera Corporation
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