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Influence of Specific Absorbed Microwave Power on Activation Energy of Densification in Ceramic Materials

Published online by Cambridge University Press:  10 February 2011

Y. Bykov ,
A. Eremeev  and
V. Holoptsev
Y. Bykov
Affiliation:
Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanov St., Nizhny Novgorod 603600 Russia.
A. Eremeev
Affiliation:
Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanov St., Nizhny Novgorod 603600 Russia.
V. Holoptsev
Affiliation:
Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanov St., Nizhny Novgorod 603600 Russia.
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Abstract

Correlation between the rate of densification in powder ceramic materials and specific absorbed microwave power is determined by the experimental method. The approach is based on a comparison of the densification curves obtained at different rates of heating. The changes in the ramping rate are provided by varying the microwave power fed into the microwave furnace. Using the energy balance for the microwave heated samples, the correlation between the apparent energy of activation at the initial stage of densification and the value of the specific microwave power absorbed in heated materials are found. The experiments with silicon nitride-based ceramics allowed to determine the reduction in the value of the activation energy resulted from an increase in the specific absorbed microwave power.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 430: Symposium O – Microwave Processing of Materials V , 1996 , 385
Copyright
Copyright © Materials Research Society 1996

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