ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Mass Spectrometric Study on Phosphorus in Molten Carbon-saturated Iron
Takashi NagaiMasao MiyakeYoshitaka MitsudaHisao KimuraMasafumi Maeda
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2007 Volume 47 Issue 2 Pages 207-210


The vapor pressure of phosphorus in molten carbon-saturated iron with phosphorus content of 0.20–0.92 mass% at 1 473–1 673 K was measured by double Knudsen cell mass spectrometry. In the molten carbon-saturated iron, phosphorus behaved according to Henry's law in the composition range. The activity coefficient of phosphorus in this conditions relative to infinite dilute solution, fP, and the interaction parameter of carbon on phosphorus in molten iron, ePC, were determined to be as follows:
log fP = −300/T+0.82(±0.05), ePC = 120/T+0.061(±0.010)

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© 2007 by The Iron and Steel Institute of Japan
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