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关于CaO与WO_3及MoO_3的固相反应机理已有文献报道.Flor等认为该反应受高价态钨离子和O~(2-)离子扩散所支配.Jae等为了获得金属钨,在900～1200℃将WO_3溶解于CaO和CaCl_2中,采用石墨电极进行熔融电解时,发现有WO_2Cl_2生成.但有关CaCl_2与WO_3及MoO_3的固相反应未见报道.本工作用热分析法研究了CaCl_2与WO_3固相反应过程,用粉末X射线衍射对反应产物进行了表征,探讨了该固相反应机理.
The solid-state reaction mechanism of CaO with WO_3 and MoO_3 has been reported in the literature, and Flor et al. [4] considered this reaction to be dominated by high-valent tungsten ions and O ~ (2-) ion diffusion. WO_3 was dissolved in CaO and CaCl_2, and WO_2Cl_2 was found when using graphite electrode for melt electrolysis.However, the solid-phase reaction of CaCl_2 with WO_3 and MoO_3 has not been reported.In this work, the effects of CaCl_2 and WO_3 solid phase The reaction process was characterized by powder X-ray diffraction and the reaction mechanism was discussed.