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Simulation of Sintering Experiments in Single-Mode Cavities

Published online by Cambridge University Press:  25 February 2011

B. Chapman
Affiliation:
Department of Electrical Engineering, University of Utah, Salt Lake City, UT, 84112
M.F. Iskander
Affiliation:
Department of Electrical Engineering, University of Utah, Salt Lake City, UT, 84112
R. L. Smith
Affiliation:
Department of Electrical Engineering, University of Utah, Salt Lake City, UT, 84112
O. M. Andrade
Affiliation:
Department of Electrical Engineering, University of Utah, Salt Lake City, UT, 84112
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Abstract

The use of single-mode cavities has been recognized as a viable technique for sintering and joining ceramics and for creating microwave plasma for materials processing. It is often reported, however, that tuning these cavities at lower and higher temperatures critically depends on the types of materials being processed, the variation of ε* as a function of temperature, the size and shape of samples, and the overall heating system configuration with and without insulation.

In this paper we use the finite-difference time-domain technique to address the performance of the single-mode cavity heating system under a wide variety of heating conditions and system configurations. Specifically, practical issues such as limiting values of sample sizes, the dependence of optimal sample sizes on the complex permittivity of materials under test, the role of sample shape on enhancing uniformity of heating patterns, and various tradeoffs involved in utilizing various cavity modes and/or SiC rods as stimulus for heating large samples are evaluated.

Type
Research Article
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

[1] Tucker, James et al., “Dynamic Model for Calculating Heating Patterns During Microwave Sintering”, ibid.Google Scholar
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