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Phase Transformations from Quartz to Cristobalite

Jusnes, Karin Fjeldstad; Tangstad, Merete; Ringdalen, Eli
Chapter, Conference object
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URI
http://hdl.handle.net/11250/2599349
Date
2018
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  • Institutt for materialteknologi [1610]
  • Publikasjoner fra CRIStin - NTNU [21000]
Original version
10.1007/978-3-319-95022-8_56
Abstract
Two quartz types used in the silicon and ferrosilicon industry were heated to temperatures of 1600 and 1700 °C. The parameters varied were the temperature and the holding time at maximum temperature. The amount of quartz, cristobalite and intermediate amorphous phase were measured using XRD and the internal standard method. Type P showed a much larger ability to transform to cristobalite at lower temperatures than type A. Type P had a larger amount of alkali and alkaline earth impurities. This could have enhanced the transformation to cristobalite. For quartz type A the amount of cristobalite was larger at 1600 °C than 1700 °C. This can also be seen for some of the samples of type P at shorter holding times.
Publisher
Springer, Cham
Series
The Minerals, Metals & Materials Series;

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