Method of preparing ferroelectric ceramics

Details Method of preparing ferroelectric ceramics Method of preparing ferroelectric ceramics

1974-11-18

1976-05-11

Cooper, Jack

Compositions

Piezoelectric

C04B 3546, C04B 3548

Patent

active

039561500

ABSTRACT:
A process for preparing strengthened ferroelectric ceramics, which comprises heat treatment of sintered ceramics after sintering of ceramic materials at a temperature range from about 100.degree. to about 400.degree.C. lower than the final sintering temperature of ceramics, holding it for about 1 to about 60 hrs, and then cooling it at a cooling rate from about 300.degree. to about 10.degree.C. per hour. Strengthened ferroelectric ceramics are obtained among the following ferroelectric ceramic compositions:

REFERENCES:
patent: 3518199 (1970-06-01), Tsubouchi et al.
patent: 3528918 (1970-09-01), Nishida et al.
patent: 3595795 (1971-07-01), Tsubouchi et al.
patent: 3669887 (1972-06-01), Nishida et al.

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