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Preparation of ultrafine molybdenum carbide (Mo2C) powder by carbothermic reduction of molybdenum trioxide (MoO3)

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Abstract

Molybdenum carbide (Mo2C) is one of most widely used transition metal carbides due to its remarkable physical and chemical properties, such as outstanding catalytic properties, good thermal stability, high hardness, excellent corrosion, and wear resistances. In the current work, a facile and feasible method was proposed to synthesize ultrafine molybdenum carbide powders with a high purity. Firstly, molybdenum trioxide (MoO3) powder was reduced with insufficient carbon black powder to remove oxygen from MoO3 and generate a mixture of Mo2C and Mo. Then, the mixture was further carbided at 1100 °C or 1200 °C by carbon black to obtain pure Mo2C with an average particle size of 230 nm or 250 nm, respectively. A complete deoxidation at the first step is of significant importance for the precisely determining the amount of carbon addition in the carbonization step. The currently proposed method is a low-cost and efficient method to produce high purity and ultrafine Mo2C in a large scale.

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Funding

The authors gratefully acknowledge financial support from the National Natural Science Foundation of China (51725401).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China

    Cheng-Min Song & Guo-Hua Zhang

  2. Jinduicheng Molybdenum Co. Ltd, Xi’an, 710077, China

    Wei-Cheng Cao, Chun-Yang Bu & Kai He

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  1. Cheng-Min Song
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  2. Wei-Cheng Cao
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  5. Guo-Hua Zhang
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Correspondence to Guo-Hua Zhang.

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Song, CM., Cao, WC., Bu, CY. et al. Preparation of ultrafine molybdenum carbide (Mo2C) powder by carbothermic reduction of molybdenum trioxide (MoO3). J Aust Ceram Soc 56, 1333–1340 (2020). https://doi.org/10.1007/s41779-020-00485-x

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