在CaCl2熔盐中直接电化学还原固态Tb4O7与Fe2O3(Tb∶Fe=2∶17)的混合 粉末, 一步制得了金属间化合物Tb2Fe17. 结合混合氧化物烧结片在850 ℃的CaCl2 熔盐中3.1 V电解不同时间段产物的成分分析探讨了还原机理：Fe2O3优先还原 成金属Fe, 随后Tb4O7粉末在Fe上还原逐渐生成Tb2Fe17. 采用不锈钢筛网电极 循环伏安法证明了Tb4O7在Fe上的欠电位还原.
To simplify the preparation process of Tb2Fe17 magnetic intermetallic compound, direct electrochemical reduction of solid pellet of mixture of Tb4O7 and Fe2O3 powder (Tb: Fe = 2: 17) to Tb2Fe17 in molten CaCl2 at 850 oC was investigated. Well stoichiometric Tb2Fe17 powder was obtained through electrolysis at 3.1V for 6h, the oxygen content in the sample was as low as 3900ppm. The reduction process was studied through the composition characterization of the products obtained at different electrolysis times. It was found that Fe2O3 was preferentially deoxidized to metallic Fe within the first hour, and then Tb4O7 was reduced assistantly by forming FeTbx and finally Tb2Fe17 was obtained with the under-potential reduction of Tb4O7 on iron. This was further confirmed by cyclic-voltammetry measurement of a novel Tb4O7 powder filling stainless steel sieve electrode.
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