Piezoelectric ceramic composition for actuator

Details Piezoelectric ceramic composition for actuator Piezoelectric ceramic composition for actuator

1992-01-09

1992-12-15

Group, Karl

Compositions

Piezoelectric

501134, C04B 3549

Patent

active

051714841

ABSTRACT:
The present invention relates to a piezoelectric ceramic composition for an actuator which is a ceramic composition comprising a main component represented by the formula: Pb.sub.(1-x) La.sub.x [Zr.sub.y Ti.sub.(1-y) ].sub.(1-x/4) O.sub.3 and, as a sub component, antinomy in an amount of more than 0.05% by weight and less than 3.0% by weight in terms of anitmony pentoxide relative to the main component. The piezoelectric ceramic composition of the present invention has a high electromechanical coupling factor, a high piezoelectric strain constant and a high Curie point, and is particularly excellent as a material for a piezoelectric actuator.

REFERENCES:
patent: 3917780 (1975-11-01), Mazdiyasni et al.
patent: 3923675 (1975-12-01), Mazdiyasni et al.
patent: 4367426 (1983-01-01), Kumada et al.
Patent Abstracts of Japan, vol. 011, No. 390 (E-567), Dec. 19, 1987, & JP-A-62-154681, Jul. 9, 1987, K. Kiyoshi et al., "PLZT Electrostrictive Porcelain for Actuator".

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