Method for evaluating the change in specific volume of refratory substances during crystallization

Method for evaluating the change in specific volume of refratory substances during crystallization A method is proposed for quantitative evaluation of the change in specific volume of refractory substance during a liquid-solid phase transition according to the surface shape of a flat ingot crystallized under conditions of central symmetrical heating. The accuracy of the estimate is up to 5–8%. With certain limitations the method is applied to a quantitative estimate of the volumetric effect of crystallization and in a number of cases melt density of the refractory materials themselves, for which obtaining information about melt density by any other method is impossible. Using the proposed method an estimate is provided for the density of molten yttrium and erbium oxides close to the melting temperature (for Y2O3 T m = 2440°C, for Er2O3 T m = 2430°C respectively). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

Method for evaluating the change in specific volume of refratory substances during crystallization

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Publisher
Springer Journals
Copyright
Copyright © 2008 by Springer Science+Business Media, Inc.
Subject
Materials Science; Characterization and Evaluation of Materials; Materials Science, general; Ceramics, Glass, Composites, Natural Materials
ISSN
1083-4877
eISSN
1573-9139
D.O.I.
10.1007/s11148-008-9062-y
Publisher site
See Article on Publisher Site

Abstract

A method is proposed for quantitative evaluation of the change in specific volume of refractory substance during a liquid-solid phase transition according to the surface shape of a flat ingot crystallized under conditions of central symmetrical heating. The accuracy of the estimate is up to 5–8%. With certain limitations the method is applied to a quantitative estimate of the volumetric effect of crystallization and in a number of cases melt density of the refractory materials themselves, for which obtaining information about melt density by any other method is impossible. Using the proposed method an estimate is provided for the density of molten yttrium and erbium oxides close to the melting temperature (for Y2O3 T m = 2440°C, for Er2O3 T m = 2430°C respectively).

Journal

Refractories and Industrial CeramicsSpringer Journals

Published: Nov 21, 2008

References

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