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Thermal expansion of some vermiculites

AuthorsJusto, Ángel ; Maqueda Porras, Celia ; Pérez-Rodríguez, José Luis
Issue DateSep-1987
PublisherSociedad Española de Arcillas
CitationThe Sixth meeting of the European Clay Groups: 314-316 (1987)
AbstractThe principal characteristic in which most of industrial uses of the vermiculite are based is its property of exfoliation when the mineral is suddenly heated up to a high temperature. This property of exfoliation is explained as due to the explosive release of water molecules from between the silicate layers, and causes the flakes to expand in a direction normal to the basal cleavage. The highest expansibility is achieved with regular mica/vermiculite interstratifications, because during thermal shock, the water.molecules from the vermiculite hit the mica layers, producing a large gap between them (Copderc and Douillet, 1973).
Description3 pages, 4 references. Congreso celebrado del 7-10, septiembre, 1987, Sevilla, España. EUROCLAY'87.
Appears in Collections:(IRNAS) Comunicaciones congresos
(ICMS) Comunicaciones congresos
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