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:
-
- Oak Ridge, TN
- (Knoxville, TN)
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 869043
- Patent Number(s):
- 5266762
- Assignee:
- Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
H - ELECTRICITY H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR H05B - ELECTRIC HEATING
- 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 = {Fri Jan 01 00:00:00 EST 1993},
month = {Fri Jan 01 00:00:00 EST 1993}
}
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Works referenced in this record:
Importance of ?casketing? for microwave sintering of materials
journal, April 1990
- Holcombe, C. E.; Dykes, N. L.
- Journal of Materials Science Letters, Vol. 9, Issue 4