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Title: Method and apparatus for radio frequency ceramic sintering

Radio frequency energy is used to sinter ceramic materials. A coaxial waveguide resonator produces a TEM mode wave which generates a high field capacitive region in which a sample of the ceramic material is located. Frequency of the power source is kept in the range of radio frequency, and preferably between 60-80 MHz. An alternative embodiment provides a tunable radio frequency circuit which includes a series input capacitor and a parallel capacitor, with the sintered ceramic connected by an inductive lead. This arrangement permits matching of impedance over a wide range of dielectric constants, ceramic volumes, and loss tangents. 6 figures.
Inventors:
;
Issue Date:
OSTI Identifier:
5294496
Assignee:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States) PTO; EDB-94-053189
Patent Number(s):
US 5266762; A
Application Number:
PPN: US 7-971204
Contract Number:
AC05-84OR21400
Resource Relation:
Patent File Date: 4 Nov 1992
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CERAMICS; SINTERING; RF SYSTEMS; DESIGN; RESONATORS; ELECTRONIC EQUIPMENT; EQUIPMENT; FABRICATION; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication