Method and apparatus for radio frequency ceramic sintering

Patent · Fri Jan 01 00:00:00 EST 1993

OSTI ID:869043

Hoffman, Daniel J ^[1]

---

1. Oak Ridge, TN

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• Assignee: Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
• Patent Number(s): US 5266762
• OSTI ID: 869043
• Country of Publication: United States
• Language: English

Related Subjects

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/