(北京科技大学 钢铁冶金新技术国家重点实验室，北京 100083)
摘 要: MoC由于其独特的物理化学性能，是一种广泛应用于催化和电化学领域的材料。本文以高纯MoO3为原料在CO气氛中合成MoC。通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)和动力学曲线分析其反应过程。结果表明，MoO3向MoC的转变过程包含3个阶段：首先，MoO3被还原为MoO2；之后，MoO2继续与CO反应生成Mo2C。最后，Mo2C继续被碳化生成MoC，在过程中始终没有钼生成。MoO3与CO反应的终产物与反应温度有关，随着反应温度升高，MoO3与CO的反应速度加快；当温度上升到1043 K，最终的反应产物不是MoC而是Mo2C。
关键字: 碳化钼；气基还原；一氧化碳；三氧化钼
（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
