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Conventional and microwave sintering of condensed silica fume

Published online by Cambridge University Press:  03 March 2011

Jan Majling ,
Peter Znasik ,
Dinesh Agrawal ,
Jiping Cheng  and
Rustum Roy
Jan Majling
Affiliation:
Department of Ceramics, Slovak Technical University, 812 37 Bratislava, Slovakia
Peter Znasik
Affiliation:
Department of Ceramics, Slovak Technical University, 812 37 Bratislava, Slovakia
Dinesh Agrawal
Affiliation:
Intercollege Materials Research Laboratory, Pennsylvania State University, University Park, Pennsylvania 16802-4801
Jiping Cheng
Affiliation:
Intercollege Materials Research Laboratory, Pennsylvania State University, University Park, Pennsylvania 16802-4801
Rustum Roy
Affiliation:
Intercollege Materials Research Laboratory, Pennsylvania State University, University Park, Pennsylvania 16802-4801
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Abstract

Condensed silica fume, a by-product from the production of silicon alloys, was sintered by (i) conventional heating in a dilatometric furnace, both at constant heating rate and isothermal heating, and (ii) by the microwave heating. The dense products with relative density up to 95% of theoretical can be obtained only by short runs at high heating rates, preferentially accomplished by the microwave treatment. Prolonged heating leads to the devitrification of the original glassy phase to cristobalite, accompanied by an arrest of densification.

Type
Rapid Communication
Information
Journal of Materials Research , Volume 10 , Issue 10 , October 1995 , pp. 2411 - 2414
Copyright
Copyright © Materials Research Society 1995

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References

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