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A Tem Study of the Metakaolin-to-Mullite Transformation in Kaolinite

Published online by Cambridge University Press:  21 February 2011

J.A. Horner ,
W.A. Martinez  and
V.A. Greenhut
J.A. Horner
Affiliation:
Rutgers University, College of Engineering, Department of Ceramics, P. O. Box 909, Piscataway, NJ 08854
W.A. Martinez
Affiliation:
Rutgers University, College of Engineering, Department of Ceramics, P. O. Box 909, Piscataway, NJ 08854
V.A. Greenhut
Affiliation:
Rutgers University, College of Engineering, Department of Ceramics, P. O. Box 909, Piscataway, NJ 08854
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Abstract

Two different kaolinites were heated in the range 850–1000°C and subsequently analyzed using TEM to study the metakaolinite-to-mullite reaction sequence. Metakaolinite was found to exist as amorphous relics of the original kaolinites. Small particles of a spinel composition appeared and grew to a maximum size of ∼50Å at temperatures below the 980°C exothermic reaction. Mullite was detected at and above 980°C which accounts for the 980°C exothermic reaction of these kaolinites.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 21: Symposium GREECE – Phase Transformations in Solids , 1983 , 195
Copyright
Copyright © Materials Research Society 1984

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