Authors:
J. Kristóf University of Veszprém Department of Analytical Chemistry H-8201 Veszprém P.O. Box 158 Hungary H-8201 Veszprém P.O. Box 158 Hungary

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R. Frost Queensland University of Technology Centre for Instrumental and Developmental Chemistry 2 George Street G.P.O. Box 2434 Brisbane Q 4001 Australia 2 George Street G.P.O. Box 2434 Brisbane Q 4001 Australia

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J. Kloprogge Queensland University of Technology Centre for Instrumental and Developmental Chemistry 2 George Street G.P.O. Box 2434 Brisbane Q 4001 Australia 2 George Street G.P.O. Box 2434 Brisbane Q 4001 Australia

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E. Horváth Hungarian Academy of Sciences Research Group for Analytical Chemistry H-8201 Veszprém P.O. Box 158 Hungary H-8201 Veszprém P.O. Box 158 Hungary

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É. Makó University of Veszprém Department of Silicate and Materials Engineering H-8201 Veszprém P.O.Box 158 Hungary H-8201 Veszprém P.O.Box 158 Hungary

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Abstract  

The thermal behaviour of mechanochemically treated kaolinite has been investigated under dynamic and controlled rate thermal analysis (CRTA) conditions. Ten hours of grinding of kaolinite results in the loss of the d(001) spacing and the replacement of some 60% of the kaolinite hydroxyls with water. Kaolinite normally dehydroxylates in a single mass loss stage between 400 and 600°C. CRTA technology enables the dehydroxylation of the ground mineral to be observed in four overlapping stages at 385, 404, 420 and 433°C under quasi-isobaric condition in a self-generated atmosphere. It is proposed that mechanochemical treatment of the kaolinite causes the localization of the protons when the long range ordering is lost.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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