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Theory of Microwave Effects on Atomic Diffusion in Sintering: Basic Considerations of The Phenomenon of Thermal Runaway

Published online by Cambridge University Press:  28 February 2011

V. M. Kenkre ,
L. Skala ,
M. W. Weiser  and
J. D. Katz
V. M. Kenkre
Affiliation:
Center for Micro-Engineered Ceramics and Department of Physics, University of New Mexico, Albuquerque, NM 87131
L. Skala
Affiliation:
Center for Micro-Engineered Ceramics and Department of Physics, University of New Mexico, Albuquerque, NM 87131
M. W. Weiser
Affiliation:
Center for Micro-Engineered Ceramics and Mechanical Engineering Department, University of New Mexico, Albuquerque, NM 87131
J. D. Katz
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87475
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Abstract

We present the results of our recent studies of the possible origin of the reported increase in sintering efficiency brought about by the application of microwaves. We study the phenomenon of thermal runaway in ceramic materials undergoing microwave heating and present a theory on the basis of a simple temperature-time equation. The nonlinear evolution inherent in the equation arises naturally from physical considerations. The theory isapplied to experimental observations reported on several different materials including silica, alumina, strontium titanate, zinc oxide and iron oxide, and shown to be in good agreement with the data.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 189: Symposium L – Microwave Processing of Materials II , 1990 , 179
Copyright
Copyright © Materials Research Society 1991

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References

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