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The Properties of Alumina Sintered in a 2.45 GHz Microwave Field.

Published online by Cambridge University Press:  28 February 2011

Mark.C.L. Patterson ,
Robert M. Kimber  and
Prasad S. Apté
Mark.C.L. Patterson
Affiliation:
Alcan International Ltd., Kingston Reasearch and Development Centre, 945 Princess Street, Kingston, ONTARIO, K7L 5L9
Robert M. Kimber
Affiliation:
Alcan International Ltd., Kingston Reasearch and Development Centre, 945 Princess Street, Kingston, ONTARIO, K7L 5L9
Prasad S. Apté
Affiliation:
Alcan International Ltd., Kingston Reasearch and Development Centre, 945 Princess Street, Kingston, ONTARIO, K7L 5L9
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Abstract

A method has been developed to reproducibly sinter high purity alumina (>99.8%) to densities in excess of 98% of theoretical. Sintering times of between 6 and 120 minutes have been investigated and a uniform grain structure is only obtained with sintering times greater than 30 minutes.

Microwave sintering produces a product with a smaller, more uniform grain structure witha more narrow size distribution. The alumina is also tougher than the conventionally sintered material.

When scaled—up to sinter batches of 400 grams, an energy consumption of 3.8 kWh/kg is required, which is estimated to be a 90% savings over conventional sinteringin an electric resistance furnace.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 189: Symposium L – Microwave Processing of Materials II , 1990 , 257
Copyright
Copyright © Materials Research Society 1991

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References

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