Preparation of Tb2Fe17 by direct electrochemical reduction of Tb4O7-Fe2O3 pellet in molten calcium chloride

被引：0
|
作者：
Qiu Guohong [1 ,2 ]
Wang Dihua [1 ]
Jin Xianbo [1 ]
George Zheng Chen [1 ,3 ]
机构：
[1] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China
[2] Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China
[3] Univ Nottingham, Sch Chem & Environm Engn, Nottingham NG7 2RD, England
来源：
ACTA METALLURGICA SINICA | 2008年 / 44卷 / 07期
关键词：
rare earth magnetic material; molten salt electrolysis; direct electrochemical reduction; intermetallic compound; Tb2Fe17;
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Tb2Fe17 magnetic intermetallic compound was successfully prepared by direct electrochemical reduction of solid pellet of mixed Tb4O7 and Fe2O3 powders (Tb : Fe=2 : 17) in molten CaCl2 at 850 degrees C. 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, and then Tb4O7 was reduced assistantly by forming TbFex 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.
引用
收藏
页码：859 / 862
页数：4
相关论文
共 13 条
  • [1] Controlled high power actuation utilising Terfenol-D
    Aston, MG
    Greenough, RD
    Jenner, AGI
    Metheringham, WJ
    Prajapati, K
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 1997, 258 (1-2) : 97 - 100
  • [2] Direct electrochemical reduction of titanium dioxide to titanium in molten calcium chloride
    Chen, GZ
    Fray, DJ
    Farthing, TW
    [J]. NATURE, 2000, 407 (6802) : 361 - 364
  • [3] CHEN JL, 2001, J SYNTH CRYST, V30, P192
  • [4] GIANT ROOM-TEMPERATURE MAGNETOSTRICTIONS IN TBFE2 AND DYFE2
    CLARK, AE
    BELSON, HS
    [J]. PHYSICAL REVIEW B, 1972, 5 (09): : 3642 - &
  • [5] TERBIUM-IRON PHASE-DIAGRAM
    DARIEL, MP
    HOLTHUIS, JT
    PICKUS, MR
    [J]. JOURNAL OF THE LESS-COMMON METALS, 1976, 45 (01): : 91 - 101
  • [6] A direct electrochemical route from ilmenite to hydrogen-storage ferrotitanium alloys
    Ma, Meng
    Wang, Dihua
    Hu, Xiaohong
    Jin, Xianbo
    Chen, George Z.
    [J]. CHEMISTRY-A EUROPEAN JOURNAL, 2006, 12 (19) : 5075 - 5081
  • [7] Metallic cavity electrodes for investigation of powders
    Qiu, GH
    Ma, M
    Wang, DH
    Jin, XB
    Hu, XH
    Chen, GZ
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2005, 152 (10) : E328 - E336
  • [8] QIU GH, 2005, J ELECTROANAL CHEM, V589, P321
  • [9] Electrochemical metallization of solid terbium oxide
    Wang, DH
    Qiu, GH
    Jin, XB
    Hu, XH
    Chen, GZ
    [J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2006, 45 (15) : 2384 - 2388
  • [10] WU BQ, 1997, METALLURGY RARE EART, P254
12