Lead titanate based piezoelectric ceramic material

Details Lead titanate based piezoelectric ceramic material Lead titanate based piezoelectric ceramic material

1992-05-15

1993-10-19

Bell, Mark L.

Compositions

Piezoelectric

501134, 501136, C04B 3546

Patent

active

052542785

ABSTRACT:
With lead titanate based piezoelectric ceramic materials wherein the composition can be represented by (Pb.sub.1-(3/2)x A.sub.x)(Ti.sub.1-y B.sub.y)O.sub.3 wherein A represents one or more elements selected from among La, Sm, Nd, Sr and Ca, B represents one or more elements selected from among Mn, Ni and Cr, and 0.02.ltoreq.x.ltoreq.0.06 and 0.001.ltoreq.y.ltoreq.0.007, the Curie temperature is high at 495.degree. C., there is no pressure - electric charge output hysteresis, and the temperature stability is excellent (less than 1100 ppm/.degree.C.).

REFERENCES:
"Dielectric, Electromechanical, Optical and Mechanical Properties of Lanthanum-Modified Lead Titanate Ceramics", T. Yamamoto, Hideji Igarashi, and Kiyoshi Okazaki, Journal of the American Ceramic Society, vol. 66, No. 5, May 1983, Columbus, Ohio, USA, pp. 363-366.
Copy of European Search Report, dated Aug. 21, 1992.

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