Compositions – Piezoelectric
Reexamination Certificate
2006-09-05
2006-09-05
Koslow, C. Melissa (Department: 1755)
Compositions
Piezoelectric
C501S134000, C310S311000
Reexamination Certificate
active
07101491
ABSTRACT:
A piezoelectric ceramic composition not containing lead, able to be sintered at ordinary pressure, and superior to the past in at least one of the properties unique to piezoelectric ceramic compositions such as the piezoelectric d31constant, that is, a piezoelectric ceramic composition having a compound of a general formula {Lix(K1-yNay)1-x}(Nb1-z-wTazSbw)O3where x, y, z, and w are in the ranges of 0≦x≦0.2, 0≦y≦1, 0<z≦0.4, and 0<w≦0.2 as a main ingredient, where the piezoelectric ceramic composition contains at least one metal element selected from (1) palladium, silver, gold, ruthenium, rhodium, rhenium, osmium, iridium, and platinum, (2) nickel, iron, manganese, copper, and zinc, or (3) magnesium, calcium, strontium, and barium as an added element, and a method of production of the same and a piezoelectric element and dielectric element utilizing that piezoelectric ceramic composition.
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European Office Action dated Sep. 18, 2003 in corresponding EP Application No. 03 01 5622.
Homma Takahiko
Nagaya Toshiatsu
Nonoyama Tatsuhiko
Saito Yasuyoshi
Takao Hisaaki
DENSO Corporation
Harness Dickey & Pierce PLC
Kabushiki Kaisha Toyota Chuo Kenkyusho
Koslow C. Melissa
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