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Synthesis and properties of aluminapillared fluorine micas having cation exchangeability

Published online by Cambridge University Press:  09 July 2018

T. Yamaguchi ,
K. Kitajima ,
E. Sakai  and
M. Daimon
T. Yamaguchi*
Affiliation:
Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, 4-17-1, WakasatoNagano-shi 380-8553, Japan
K. Kitajima
Affiliation:
Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, 4-17-1, WakasatoNagano-shi 380-8553, Japan
E. Sakai
Affiliation:
Department of Metallurgy and Ceramics Science, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
M. Daimon
Affiliation:
Department of Metallurgy and Ceramics Science, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
*
*E-mail: [email protected]
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Abstract

Alumina-pillared fluorine micas were prepared from synthetic highly layer-charged expandable fluorine mica and polyhydroxoaluminium solutions under different solution loadings (Al mmol in solutions per 1.0 g mica) in order to clarify the effects of solution loading on thermal durability and microporous properties. The intercalated Al content of the pillared micas increased with increased solution loading. The intercalated Al content (i.e. the pillar density) of the pillared micas influenced both the thermal durability and specific surface areas of the pillared micas. The pillared micas obtained from the high solution loadings showed better thermal durability than those obtained from the low solution loadings. Through micropore formation upon heating, the pillared micas exhibit cation exchangeability due to the liberation of residual Na+ ions from steric hindrance in the interlayer pillaring space. The amount of the exchangeable ions depends on the heating temperature of the pillared micas.

Keywords

synthetic expandable fluorine micaalumina-pillared micapolyhydroxoaluminiumcation, intercalationcation exchangeability
Type
Research Article
Information
Clay Minerals , Volume 38 , Issue 1 , March 2003 , pp. 41 - 47
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2003

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