介绍了一种一步法制备碳化钨(WC)的新方法,以钨酸钠为原料,通过碳纳米管模板和载体制备小颗粒钨酸,制备出钨酸和碳黑的混合物作为反应前驱体,分别以H2和N2作为还原及保护气体合成WC,当合成温度高于800℃,反应前反应管内抽成真空,并在反应管内通入氢气和氮气流时,WO3首先被还原为W,接下来W被还原为W2C,最后,W2C被还原为最终产物WC.实验过程中通过调节气氛和温度2个重要反应条件,探索出了控制WC形貌及大量制备的方法,为WC的低成本及可控制备提供了新的途径.
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