Compositions: ceramic – Ceramic compositions – Titanate – zirconate – stannate – niobate – or tantalate or...
Patent
1986-06-10
1988-08-16
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Titanate, zirconate, stannate, niobate, or tantalate or...
501134, 501135, 252 629, C04B 3546
Patent
active
047644923
ABSTRACT:
An improved lead calcium titanate piezoelectric sintered body is produced by sintering in air at 1000.degree. C.-1200.degree. C. a calcined mixture of oxides or oxide compounds in amounts adapted to form a composition of the formula Pb.sub.1-x Ca.sub.x Ti.sub.1-y (Co.sub.1/2 W.sub.1/2).sub.y O.sub.3 +0.005-0.02(A) where A is at least one of MnO, MnO.sub.2, NiO and Nb.sub.2 O.sub.3, wherein x=0.3-0.4 and 0.04<y.ltoreq.0.06.
REFERENCES:
patent: 3472778 (1969-10-01), Tsubouchi et al.
patent: 4319485 (1982-03-01), Terada et al.
patent: 4321155 (1982-03-01), Yamashita et al.
Damjanovic Dragan
Jang Sei-Joo
Takeuchi Kiyoshi
Bell Mark L.
Knab Ann M.
North American Philips Corporation
Spain Norman N.
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