Details
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Name:
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SUZUKI, Ryosuke |
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Company/Department:
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Dept. Energy Sci. & Tech. Kyoto Univ. |
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Street
adress:
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Yoshida-Honmachi, Sakyo-ku |
P
O Box:
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Zip
Code:
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606-8501 |
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City:
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Kyoto |
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Country:
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Japan |
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Email:
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rsuzuki@eng.hokudai.ac.jp |
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Title:
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Ca-DEOXIDATION OF Nb AND Ti IN Ca-SATURATED CaCl2 MOLTEN SALT |
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co
authors:
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M. Aizawa, T. Ohshima and K. Ono Kyoto Univ., Kyoto, Japan |
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Abstract:
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Niobium was deoxidized under Ca(liquid)-CaO(solid) equilibrium at 1273K to a level below the lower limit of quantitative chemical analysis, 50 mass ppm oxygen. When Ca was supplied as vapor into a CaO-saturated CaCl2 melt, Ca could saturate in the CaCl2 melt, and the impurity carbon and nitrogen in Nb was minimized. The oxygen concentration in Ti was the same as that under Ca-CaO equilibrium, and that in Nb was below 50 ppm. By Ca-halide flux deoxidation using the Ca-saturated but CaO-unsaturated CaCl2 melt, the oxygen content in Nb was estimated to be smaller than a single ppm. The activity of CaO in the salt was evaluated at 1273K using the equilibrium oxygen concentration in Ti. |
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Session
nr:
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24 |
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PDFfile:
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Click to open this paper filed in Proc.! (299kB) |