ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Activity of FeO in the FeO-MgO-SiO2 System Determined by High Temperature Mass Spectrometry
Ernest R. PlanteJohn W. HastieMaria Kowalska
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1992 Volume 32 Issue 12 Pages 1276-1279

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Abstract

Using the Knudsen-cell mass-spectrometric technique, coupled with an analysis based on the Gibbs-Duhem integration of mass spectral ion-intensity ratios, activities have been obtained for the molten FeO-MgO-SiO2 system. The thermodynamic activity of FeO has been dtermined as a function of FeO content (0.1-0.9 mole fraction FeO) across the ternary section defined by an MgO to SiO2 mole fraction ratio of unity. A significant positive deviation from ideal solution behavior is found for the FeO activity.

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© The Iron and Steel Institute of Japan
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