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Observation of an Electromagnetically Driven Temperature Wave in Porous Zinc Oxide During Microwave Heating

Published online by Cambridge University Press:  10 February 2011

D. Dadon ,
D. Gershon ,
Y. Carmel ,
K. I. Rybakov ,
R. Hutcheon ,
A. Birman ,
L. P. Martin ,
J. Calame ,
B. Levush  and
M. Rosen
D. Dadon
Affiliation:
Department of Material Science and Engineering, Johns Hopkins University, Baltimore, MD.
D. Gershon
Affiliation:
Institute for Plasma Research, University of Maryland, College Park, MD.
Y. Carmel
Affiliation:
Institute for Plasma Research, University of Maryland, College Park, MD.
K. I. Rybakov
Affiliation:
Institute for Plasma Research, University of Maryland, College Park, MD. Permanent address: Institute of Applied Physics, Nizhny Novgorod, Russia
R. Hutcheon
Affiliation:
Chalk River Laboratories, Chalk River, Ontario KOJIJO, Canada.
A. Birman
Affiliation:
Institute for Plasma Research, University of Maryland, College Park, MD.
L. P. Martin
Affiliation:
Department of Material Science and Engineering, Johns Hopkins University, Baltimore, MD.
J. Calame
Affiliation:
Institute for Plasma Research, University of Maryland, College Park, MD.
B. Levush
Affiliation:
Institute for Plasma Research, University of Maryland, College Park, MD.
M. Rosen
Affiliation:
Department of Material Science and Engineering, Johns Hopkins University, Baltimore, MD.
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Abstract

Propagation of a sharp temperature wave was observed during microwave heating of porous zinc oxide in nitrogen and argon atmospheres. This wave initiated from the center of the sample and traveled at an average velocity of 0.2 cm/min towards its surface. This temperature wave was attributed to an anomalous peak in the imaginary part of the complex permittivity possibly caused by desorption of chemisorbed oxygen from the surfaces of ZnO crystallites.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 430: Symposium O – Microwave Processing of Materials V , 1996 , 507
Copyright
Copyright © Materials Research Society 1996

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References

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