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Thermodynamic analysis of Cr2O3 carbonization products
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The State Key Laboratory of Refractory and Metallurgy,Wuhan University of Science and Technology,The State Key Laboratory of Refractory and Metallurgy,Wuhan University of Science and Technology,The State Key Laboratory of Refractory and Metallurgy,Wuhan University of Science and Technology,The State Key Laboratory of Refractory and Metallurgy,Wuhan University of Science and Technology

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TF123

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    Abstract:

    In order to study the technological conditions to prepare Cr7C3, the carbonization products of Cr2O3 were analyzed from the aspects of thermodynamics and the thermodynamic simulation of Cr7C3 was carried out by method of standard reaction thermal effect calculation. The effects of reaction temperature, reaction atmosphere and material ratio on the preparation of Cr7C3 were studied, and the principle of high purity Cr7C3 prepared by carbon thermal reduction method from the melt was explained. The results show that minimum formation temperature of Cr7C3 is 1368 K, the increase of the reaction temperature helps to increase the yield of Cr7C3; Lowering the CO partial pressure of the system is beneficial to reduce the initial temperature of the reaction and the formation of Cr7C3; Cr7C3 can react with C in the system to generate Cr3C2. Meanwhile increasing the reaction temperature and optimizing the material ratio are conducive to inhibit the excessive carbonization of Cr7C3.

    Reference
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[Zhao Pengda, Zhang Han, Yu Jun, Zhao Huizhong. Thermodynamic analysis of Cr2O3 carbonization products[J]. Rare Metal Materials and Engineering,2018,47(S1):55~58.]
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History
  • Received:May 25,2017
  • Revised:July 06,2017
  • Adopted:January 29,2018
  • Online: October 22,2018