Joint reduction of zirconium dioxide and sodium carbonate to form zirconium carbide was studied. Magnesiothermic reduction of ZrO2 was shown to occur at 600 – 620°C; Na2CO3, 590 – 610°C. Thermodynamic calculations and x-ray phase analyses indicated the transformations occurring during the synthesis and the resulting reaction products. Use of graphite as the carbon source did not lead to ZrC formation at 700 – 900°C, in contrast with Na2CO3.
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The research was conducted in the framework of FTP “Research and development on priority areas for development of the Russian science and technology complex for 2014 – 2020,” Contract No. 14.578.21.0200 (unique identifier PNIER RFMEFI 57816X0200).
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Translated from Novye Ogneupory, No. 2, pp. 45 – 48, February, 2019.
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Shishkin, R.A., Kudyakova, V.S. & Zhirenkina, N.V. Physicochemical Transformations During Low-Temperature Synthesis of Zirconium Carbide. Refract Ind Ceram 60, 105–108 (2019). https://doi.org/10.1007/s11148-019-00317-x
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DOI: https://doi.org/10.1007/s11148-019-00317-x