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Kinetics studies on the dissolution of nitrogen in the CaO-Al2O3-SiO2 and CaO-Al2O3-TiO x melts

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Abstract

The rate of nitrogen dissolution in CaO-Al2O3-SiO2 and CaO-Al2O3-TiO x melts was measured by 14N–15N isotope exchange reaction. The rate constant for the CaO-Al2O3-SiO2 melts at the ratio of mass pct CaO/mass pct Al2O3 = 1 increases as SiO2 content increases, whereas the rate constant for the same melts at the ratio of mass pct CaO/mass pct SiO2 = 1 increases as Al2O3 content increases. The rate constant for the CaO-Al2O3-TiO x melts at the ratio of mass pct CaO/mass pct Al2O3 = 1 decreases as the TiO x content increases. The activation energies of nitrogen dissolution in CaO-Al2O3-SiO2 melts are about 1.5 to 3 times larger than that of molten pure iron. Moreover, the rate constant of nitrogen dissolution is independent of the ratio of Ti3+/Ti4+.

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Authors and Affiliations

  1. the Department of Metallurgy, The University of Tokyo, 113-8656, Tokyo, Japan

    Koichi Iuchi (Graduate Student), Kazuki Morita (Associate Professor) & Nobuo Sano (Emeritus Professor, Executive Advisor)

  2. Nippon Steel Corporation, 293-8511, Chiba, Japan

    Nobuo Sano (Emeritus Professor, Executive Advisor)

Authors
  1. Koichi Iuchi
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  2. Kazuki Morita
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  3. Nobuo Sano
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Iuchi, K., Morita, K. & Sano, N. Kinetics studies on the dissolution of nitrogen in the CaO-Al2O3-SiO2 and CaO-Al2O3-TiO x melts. Metall Mater Trans B 29, 1235–1240 (1998). https://doi.org/10.1007/s11663-998-0046-6

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  • DOI: https://doi.org/10.1007/s11663-998-0046-6

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