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Some physical properties of raw and calcined flint

Published online by Cambridge University Press:  14 March 2018

J. H. Weymouth  and
W. O. Williamson
J. H. Weymouth
Affiliation:
Division of Industrial Chemistry, Commonwealth Scientific and Industrial Research Organization, Australia
W. O. Williamson
Affiliation:
Division of Industrial Chemistry, Commonwealth Scientific and Industrial Research Organization, Australia
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Extract

Flint from the chalk of north-western Europe has long been an ingredient of ceramic 'bodies'. It is still widely used by British pottery manufacturers in glazed tries and in certain types of tableware. Continental manufacturers also have made some use of it.

Flint is more readily converted to cristobalite than are the coarsergrained varieties of quartzose silica. The presence of an adequate amount of cristobalite in the 'body' ensures that, at room-temperature, the glaze-film on the ware shall be under a compressive stress. Thus the development of 'crazing', i.e. of minute tension-fissures in the glaze, tends to be avoided.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 29 , Issue 213 , June 1951 , pp. 573 - 593
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1951

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