Method of making a transparent ferroelectric ceramic element

Details Method of making a transparent ferroelectric ceramic element Method of making a transparent ferroelectric ceramic element

1975-09-12

1977-11-08

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Including plural heating steps

264140, 264332, C04B 3564

Patent

active

040573249

ABSTRACT:
A method of making an electrooptical system including a transparent ferroelectric ceramic element which possesses memory in that a birefringence corresponding to an applied electric field remains after the field is removed. The electrooptical element is hot-pressed from a family of materials which comprises solid solution of the ternary system, lead magnesium niobate-lead titanate-lead zirconate, and the hot-pressed material may additionally contain a small amount of lanthanum oxide (La.sub.2 O.sub.3).

REFERENCES:
haertling et al., "Hat Pressed (Pb,La) (Zr,Ti)O.sub.3 Ferroelectric Ceramics for Electrooptic Applications", J. Am. Cer. Soc., vol. 54, No. 1, Jan. 1971, pp. 1-11.
Bickford et al., "Ferroelectric Ceramics", Cer. Ind., vol. 66, No. 3, pp. 79-80 Mar. 1956.
Backner et al., "Effects of Calcining on Sintering of Lead Zirconate-Titanate Ceramics," Cer. Bull., vol. 51, No. 3, pp. 218-222 (1972).

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