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Enhanced production of magnesium silicates from strained magnesia1

Published online by Cambridge University Press:  14 March 2018

W. F. Bush  and
W. O. Williamson
W. F. Bush
Affiliation:
Department of Ceramic Technology, College of Mineral Industries, The Pennsylvania State University, University Park, Pennsylvania, U.S.A.
W. O. Williamson
Affiliation:
Department of Ceramic Technology, College of Mineral Industries, The Pennsylvania State University, University Park, Pennsylvania, U.S.A.
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Summary

Mechanically strained, in contrast to annealed, MgO produced greater yields of forsterite and protoenstatite by solid-state reaction with a quartz–cristobalite mixture at 1200–1400° C. The specific surfaces of the strained and of the annealed MgO were similar. The strained MgO was more hygroscopic and similarity of the surface free energies was thus unlikely. The difference in the amounts of silicates produced from the two types of MgO decreased as the temperatures of synthesis increased. This was ascribed to loss of strain energy by unavoidable annealing before and after these temperatures had been reached.

Similar results were obtained when hydrated silica was substituted for the quartz-eristobalite mixture, but more forsterite was produced.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 35 , Issue 269 , March 1965 , pp. 177 - 188
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1965

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Footnotes

2

Present Address: Ferro Corporation, Cleveland, Ohio, U.S.A.

1

Contribution No. 63-13 from the College of Mineral Industries, The Pennsylvania State University, University Park, Pa.

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