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Title: Method and apparatus for radio frequency ceramic sintering

Abstract

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.

Inventors:
 [1];  [2]
  1. (Oak Ridge, TN)
  2. (Knoxville, TN)
Issue Date:
Research Org.:
LOCKHEED MARTIN ENRGY SYST INC
OSTI Identifier:
869043
Patent Number(s):
5266762
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN) ORNL
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; radio; frequency; ceramic; sintering; energy; sinter; materials; coaxial; waveguide; resonator; produces; mode; wave; generates; field; capacitive; region; sample; material; located; power; source; kept; range; preferably; 60-80; mhz; alternative; embodiment; provides; tunable; circuit; series; input; capacitor; parallel; sintered; connected; inductive; lead; arrangement; permits; matching; impedance; wide; dielectric; constants; volumes; loss; tangents; dielectric constants; dielectric constant; ceramic material; power source; radio frequency; ceramic materials; wide range; alternative embodiment; sintered ceramic; frequency energy; arrangement permits; embodiment provides; frequency circuit; ceramic mater; /219/264/425/

Citation Formats

Hoffman, Daniel J., and Kimrey, Jr., Harold D. Method and apparatus for radio frequency ceramic sintering. United States: N. p., 1993. Web.
Hoffman, Daniel J., & Kimrey, Jr., Harold D. Method and apparatus for radio frequency ceramic sintering. United States.
Hoffman, Daniel J., and Kimrey, Jr., Harold D. Fri . "Method and apparatus for radio frequency ceramic sintering". United States. https://www.osti.gov/servlets/purl/869043.
@article{osti_869043,
title = {Method and apparatus for radio frequency ceramic sintering},
author = {Hoffman, Daniel J. and Kimrey, Jr., Harold D.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}

Patent:

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