(北京科技大學 鋼鐵冶金新技術國家重點實驗室，北京 100083)
摘 要: MoC由于其獨特的物理化學性能，是一種廣泛應用于催化和電化學領域的材料。本文以高純MoO3為原料在CO氣氛中合成MoC。通過掃描電子顯微鏡(SEM)、X射線衍射儀(XRD)和動力學曲線分析其反應過程。結果表明，MoO3向MoC的轉變過程包含3個階段：首先，MoO3被還原為MoO2；之后，MoO2繼續(xù)與CO反應生成Mo2C。最后，Mo2C繼續(xù)被碳化生成MoC，在過程中始終沒有鉬生成。MoO3與CO反應的終產物與反應溫度有關，隨著反應溫度升高，MoO3與CO的反應速度加快；當溫度上升到1043 K，最終的反應產物不是MoC而是Mo2C。
關鍵字: 碳化鉬；氣基還原；一氧化碳；三氧化鉬
（State Key Laboratory of Advanced Metallurgy, University of Science and Technology, Beijing 100083, China）
Abstract:Due to its unique physical and chemical properties, MoC is an important material widely used in the fields of catalysis and electrochemistry. The reaction between high purity MoO3 powder and CO was investigated for purpose of producing MoC. From the scanning electron microscopy (SEM), X-ray diffractometer (XRD) and dynamic curve analysis. The results show that the reaction process between MoO3 and CO is composed of three stages: the reduction of MoO3 to MoO2, the carburization from MoO2 to Mo2C and further carburization of Mo2C to MoC, while molybdenum never forms in the reaction process. In addition, it is found that the final product is related to the reaction temperature, with the increase of reaction temperature, the reaction speed of MoO3 and CO accelerates, and as the temperature rises to 1043 K, MoC will be transformed to Mo2C.
Key words: molybdenum carbide; gas-based reduction; carbon monoxide; molybdenum trioxide
