The system cadmium oxide-boric oxide

Subbarao, E. C. ; Hummel, F. A. (1956) The system cadmium oxide-boric oxide Journal of the Electrochemical Society, 103 (1). pp. 29-33. ISSN 0013-4651

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Phase relationships in the system CdO-B2O3 were investigated by the quench method and by differential thermal analyses. A large region of liquid immiscibility extends from practically 100% B2O3 to about 46% B2O3. The compounds 2CdO·3B2O3 (44.86% B2O3), and 3CdO·2B2O3 (26.55% B2O3) both melt congruently near 1000°C and form a simple eutectic system. The compound 2CdO·B2O3 (21.33% B2O3) undergoes a rapid, reversible inversion near 900° C and melts congruently at 980°C. A large volume change attends a polymorphic transition in the compound 3CdO·B2O3 (15.31% B2O3) at 875° C and it meltsat 1020° C. The compounds and polymorphs were characterized by X-ray diffraction, optical and thermal data. Some experiments on the solid solubility of MnO in the C2B3, C3B2, and C2B1 compounds are described.

Item Type:Article
Source:Copyright of this article belongs to The Electrochemical Society.
Keywords:Cadmium Compounds; Oxygen Compounds; Boron Compounds; Phase Diagrams; Phase Equilibrium; Eutectic Alloys; Melting Point; Solid Solubility; Crystal Structure; Thermal Expansion; High-temperature Effects
ID Code:50462
Deposited On:25 Jul 2011 10:29
Last Modified:25 Jul 2011 10:29

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