Plastic and nonmetallic article shaping or treating: processes – Including step of generating heat by friction
Patent
1982-09-02
1984-10-16
Parrish, John A.
Plastic and nonmetallic article shaping or treating: processes
Including step of generating heat by friction
264 65, 264345, C04B 3546
Patent
active
044774010
ABSTRACT:
A method of manufacturing a dielectric from ferroelectric ceramic material having a perovskite structure with the basic formula ABO.sub.3. In the method, the dielectric is sintered in a reducing atmosphere and the sintered body is aftertreated at a temperature in the range of from 500.degree. to 900.degree. C. in an N.sub.2 --O.sub.2 atmosphere. The atmosphere contains a quantity of O.sub.2 corresponding to a partial O.sub.2 -pressure between 10.sup.-5 bar and 0.2 bar.
REFERENCES:
patent: 3920781 (1975-11-01), Eror et al.
patent: 4131444 (1978-12-01), Walker
Hagemann Hans J.
Hunten Siegfried
Klomp Cornelius J.
Noorlander Willem
Wernicke Rolf
Parrish John A.
Schechter Marc D.
U.S. Philips Corporation
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