ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Nitride Capacity of CaO-Al2O3 Melts
Katsutomo TomiokaHideaki Suito
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JOURNALS FREE ACCESS

1991 Volume 31 Issue 11 Pages 1316-1321

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Abstract

The nitride capacities (CN3-=(%N)·PO23/4/PN21/2) in CaO-Al2O3 melts were measured by a gas-slag equilibration technique, using CaO, Al2O3, and Mo crucibles in the temperature range of 1723 to 1923 K. The oxygen partial pressures measured by a solid electrolyte cell were controlled by N2-H2-H2O gas mixtures. It was found that the nitride capacities increased with increasing temperature and Al2O3 content in the slag. Activity coefficients of AlN calculated from the reported activities of Al2O3 increased with a decrease of Al2O3 content and temperature.

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© The Iron and Steel Institute of Japan
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