Study on reduction of MoS<sub>2</sub> powders with activated carbon to produce Mo<sub>2</sub>C under vacuum conditions

Guo-hua Zhang; He-qiang Chang; Lu Wang; Kuo-chih Chou

doi:10.1007/s12613-018-1585-8

Volume 25 Issue 4

Apr. 2018

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2018 > 25(4): 405-412

Guo-hua Zhang, He-qiang Chang, Lu Wang, and Kuo-chih Chou, Study on reduction of MoS₂ powders with activated carbon to produce Mo₂C under vacuum conditions, Int. J. Miner. Metall. Mater., 25(2018), No. 4, pp. 405-412. https://doi.org/10.1007/s12613-018-1585-8

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Guo-hua Zhang, He-qiang Chang, Lu Wang, and Kuo-chih Chou, Study on reduction of MoS2 powders with activated carbon to produce Mo2C under vacuum conditions, Int. J. Miner. Metall. Mater., 25(2018), No. 4, pp. 405-412. https://doi.org/10.1007/s12613-018-1585-8

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Research Article

Study on reduction of MoS₂ powders with activated carbon to produce Mo₂C under vacuum conditions

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Corresponding author:
Guo-hua Zhang E-mail: ghzhang_ustb@163.com
Received: 15 June 2017; Revised: 27 October 2017; Accepted: 3 November 2017

Abstract

Abstract

A method of preparing Mo₂C via vacuum carbothermic reduction of MoS₂ in the temperature range of 1350-1550℃ was proposed. The effects of MoS₂-to-C molar ratio (α, α=1:1, 1:1.5, and 1:2.5) and reaction temperature (1350 to 1550℃) on the reaction were studied in detail. The phase transition, morphological evolution, and residual sulfur content of the products were analyzed by X-ray diffraction, field-emission scanning electron microscopy, and carbon-sulfur analysis, respectively. The results showed that the complete decomposition of MoS₂ under vacuum is difficult, whereas activated carbon can react with MoS₂ under vacuum to generate Mo₂C. Meanwhile, higher temperatures and the addition of more carbon accelerated the rate of carbothermic reduction reaction and further decreased the residual sulfur content. From the experimental results, the optimum molar ratio α was concluded to be 1:1.5.
- vacuum treatment;
- carbon thermoreduction;
- molybdenum minerals;
- molybdenum carbide;
- microstructure

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