Synthesis of rare-earth chromates in the presence of certain oxides

Synthesis of rare-earth chromates in the presence of certain oxides The effect of Al2O3, SiO2, MgO, 3Al2O3·2SiO2 on the synthesis of LnCrO3 (where Ln=Nd, Sm, Yb) at high temperatures is considered. Chromium oxide in all the compositions Ln2O3−Cr2O3−Al2O3 (SiO2, MgO, 3Al2O3·2SiO2) reacts mostly with Ln2O3, i.e., silicon oxide alumina, magnesium oxide, and mullite do not interfere with formation of rare-earth chromates. This makes it possible to predict high durability for LnCrO3 electric heaters operating in contact with corundum, dinas, aluminosilicate, and periclase refractories in laboratory and industrial furnaces. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

Synthesis of rare-earth chromates in the presence of certain oxides

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Publisher
Springer US
Copyright
Copyright © 1997 by Plenum Publishing Corporation
Subject
Chemistry; Characterization and Evaluation of Materials; Materials Science; Ceramics, Glass, Composites, Natural Methods
ISSN
1083-4877
eISSN
1573-9139
D.O.I.
10.1007/BF02767846
Publisher site
See Article on Publisher Site

Abstract

The effect of Al2O3, SiO2, MgO, 3Al2O3·2SiO2 on the synthesis of LnCrO3 (where Ln=Nd, Sm, Yb) at high temperatures is considered. Chromium oxide in all the compositions Ln2O3−Cr2O3−Al2O3 (SiO2, MgO, 3Al2O3·2SiO2) reacts mostly with Ln2O3, i.e., silicon oxide alumina, magnesium oxide, and mullite do not interfere with formation of rare-earth chromates. This makes it possible to predict high durability for LnCrO3 electric heaters operating in contact with corundum, dinas, aluminosilicate, and periclase refractories in laboratory and industrial furnaces.

Journal

Refractories and Industrial CeramicsSpringer Journals

Published: Nov 26, 2007

References

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