金属学报  2008, Vol. 44 Issue (7): 859-862

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直接熔盐电化学还原固态 Tb4O7-Fe2O3制备 Tb2Fe17

汪的华;邱国红;金先波;陈政

武汉大学化学分子科学学院

Investigation on Preparation of Tb2Fe17 by Direct Electrochemical Reduction of Tb4O7-Fe2O3 Pellet in Molten Calcium Chloride

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武汉大学化学分子科学学院

汪的华; 邱国红; 金先波; 陈政 . 直接熔盐电化学还原固态 Tb4O7-Fe2O3制备 Tb2Fe17[J]. 金属学报, 2008, 44(7): 859-862 .
, , , . Investigation on Preparation of Tb2Fe17 by Direct Electrochemical Reduction of Tb4O7-Fe2O3 Pellet in Molten Calcium Chloride[J]. Acta Metall Sin, 2008, 44(7): 859-862 .

摘要 参考文献 相关文章 Metrics 全文: PDF(1092 KB)   摘要: 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. 关键词 ： 稀土磁性材料,  熔盐电解,  直接电化学还原     Abstract：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. Key words： rare earth magnetic materials    molten salt electrolysis    direct electrochemical reduction    intermetalli 收稿日期: 2007-10-10      ZTFLH:  TG146.4   服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 汪的华 邱国红 金先波 陈政 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y2008/V44/I7/859 [1]Clark A E,Belson H S.Phys Rev,1972;5B:3642 [2]Dariel M P,Holthuis J P,Pickus M R.J Less-Common Met,1976;45:91 [3]Aston M G,Greenough R D,Jenner A G I,Metheringham W J,Prajapati K.J Alloys Compd,1997;258:97 [4]Chen J L,Meng L Q,Zhao D Q,Gao S X,Du J,Wu G H.J Synth Cryst,2001;30:192 (陈京兰，孟丽琴，赵德乾，高书侠，杜江，吴光恒．人工晶体学报，2001；30：192) [5]Wu B Q.Metallurgy of Rare Earths.Changsha:Central South of Technology University Press,1997:254 (吴炳乾．稀土冶金学．长沙：中南工业大学出版社，1997：254) [6]Chen G Z,Fray D J,Farthing T W.Nature,2000;407: 361 [7]Yah X Y,Fray D J.Adv Funct Mater,2005;15:1757 [8]Ma M,Wang D H,Hu X H,Jin X B,Chen G Z.Chem Eur J,2006;12:5075 [9]Zhu Y,Wang D H,Hu X H,Jin X B,Chen G Z.Chem Commun,2007;24:2515 [10]Zhu Y,Ma M,Wang D H,Jiang K,Hu X H,Jin X B, Chen G Z.Chin Sci Bull,2006;51:2535 [11]Wang D H,Qiu G H,Jin X B,Hu X H,Chen G Z.Angew Chem Int Ed,2006;45:2384 [12]Qiu G H,Wang D H,Ma M,Jin X B,Chen G Z.J Elec- troanal Chem,2005;589:321 [13]Qiu G H,Ma M,Wang D H,Jin X B,Hu X H,Chen G Z.J Electrochem Soc,2005;152:E328 [1] 韩庆; 陈建设; 刘奎仁; 魏绪钧 . 复合型 LaNi5/Ni-S 合金镀层在碱液中的析氢反应[J]. 金属学报, 2008, 44(7): 887-891 . [2] 王旭; 翟玉春; 谢宏伟 . 熔盐电解法制备CaB6及其表征[J]. 金属学报, 2008, 44(10): 1243-1246 . Viewed Full text Abstract Cited   Shared      Discussed