Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Thermodynamics of Phosphate and Phosphide in BaO-BaF2 Melts
Satoshi TABUCHINobuo SANO
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1985 Volume 71 Issue 6 Pages 687-692

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Abstract

The thermodynamics of phosphate and phosphide in BaO-BaF2 melts was studied by equilibrating the melts in a graphite boat with CO-Ar mixtures and Ag-P alloys between 1 200°C and 1 450°C.
The concentration dependence of both constituents on the partial pressure of phosphorus and oxygen, the melt composition and temperature was determined.
Comparing with the CaO-CaF2 system previously reported by the authors, BaO-BaF2 melts were found to have a larger capacity for phosphate by an order of magnitude but nearly the same one for phosphide.
It is concluded that BaO-BaF2 melts are very effective in removing phosphorus from other systems under either oxidizing or reducing conditions.

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© The Iron and Steel Institute of Japan
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