|
|
|
| Investigation on Preparation of Tb2Fe17 by Direct Electrochemical Reduction of Tb4O7-Fe2O3 Pellet in Molten Calcium Chloride |
| ;;; |
| 武汉大学化学分子科学学院 |
|
Cite this article:
;. Investigation on Preparation of Tb2Fe17 by Direct Electrochemical Reduction of Tb4O7-Fe2O3 Pellet in Molten Calcium Chloride. Acta Metall Sin, 2008, 44(7): 859-862 .
|
|
|
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.
|
|
Received: 10 October 2007
|
|
|
[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 |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
