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Equilibria between cerium or neodymium and oxygen in molten iron

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Abstract

Autoradiographs show that there is an obvious reaction between Ce and Nd in liquid iron and the MgO/CaO crucible wall. For reaching the Ce-O, Nd-O equilibrium, a long melting period and the addition of rare earth elements (RE’s) in several batches were needed to ensure the full reaction between the RE’s in the melt and crucible wall. The dissolved Ce or Nd content in iron was measured by means of radioactive isotopes141Ce or147Nd and electrolysis in the organic electrolyte. The oxygen activity was measured by solid electrolyte sensors made of ZrO2(MgO) tube. The relationships between the equilibrium constants and the temperatures for reactions Ce2O3 (s) = 2[Ce] + 3[O], CeO2 (s) = [Ce] + 2[O], and Nd2O3 (s) = 2[Nd] + 3[O], as well as the corresponding thermodynamic parameters, have been determined.

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Authors and Affiliations

  1. Department of Physical Chemistry of Metallurgy, University of Science and Technology Beijing, Beijing, People’s Republic of China

    Qiyong Han (Professor)

  2. Ninxia University for Training Technicians, Yinchuan, People’s Republic of China

    Xian Feng (Lecturer)

  3. Shandong Aluminum Factory, Zibo, People’s Republic of China

    Shiwei Liu (Engineer)

  4. Bureau of Bio-Sciences and Biotechnology, Chinese Academy of Sciences, Beijing, People’s Republic of China

    Hongbing Niu (Engineer)

  5. Xinjiang Steel Works, Wulumuqi, People’s Republic of China

    Zhiwei Tang (Engineer)

Authors
  1. Qiyong Han
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  2. Xian Feng
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  3. Shiwei Liu
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  4. Hongbing Niu
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  5. Zhiwei Tang
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Formerly Graduate Student at the University of Science and Technology Beijing

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Han, Q., Feng, X., Liu, S. et al. Equilibria between cerium or neodymium and oxygen in molten iron. Metall Trans B 21, 295–302 (1990). https://doi.org/10.1007/BF02664197

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  • DOI: https://doi.org/10.1007/BF02664197

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