Plastic and nonmetallic article shaping or treating: processes – Including step of generating heat by friction
Patent
1992-06-30
1993-09-28
Derrington, James
Plastic and nonmetallic article shaping or treating: processes
Including step of generating heat by friction
264 66, 264 82, 264570, 264 61, C04B 3564
Patent
active
052484653
ABSTRACT:
Disclosed herein is a process for the preparation of a high-permittivity material. The process comprises pre-calcining a ceramic material under a predetermined pressure to obtain a sintered body, and then subjecting the sintered body to a hot isostatic pressing treatment in an oxidizing atmosphere. The high-permittivity material is low in void content, is very small in dispersion of its dielectric constant and hence has excellent dielectric properties.
REFERENCES:
patent: 3853973 (1974-12-01), Hardtl
patent: 4816072 (1989-03-01), Harley et al.
patent: 5039464 (1991-08-01), Wank
Hirai Takami
Yano Shinsuke
Derrington James
NGK Insulators Ltd.
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