稀土学报(英文版)
稀土學報(英文版)
희토학보(영문판)
JOURNAL OF RARE EARTHS
2003年
2期
132-134
,共3页
郭广思%王广太%隋智通
郭廣思%王廣太%隋智通
곽엄사%왕엄태%수지통
inorganic chemistry%Ca-Tb4O7-Fe system%TbFe2%contracting core model%rare earths
The pure TbFe2 is a sort of intermetallic compound to produce (TbDy)Fe2. It has important practical meanings to develop a new method for producing pure TbFe2 directly from Tb4O7 with low cost and non-pollution. Based on our previous thermodynamic study on the production of TbFe2 by reduction-diffusion in Ca-Tb4O7-Fe system, kinetics has been further studied in this work. It is confirmed that the product is TbFe2 by means of XRD. The contracting core model is applied. The reactions are found to be diffusion controlled. The apparent activation energy of TbFe2 is 39 kJ*mol-1.
