由金属氧化物直接制备铽铁(Fe_2Tb)金属间化合物的研究

Study for preparation of Fe_2Tb intermetallic compound from metal oxide directly

采用金属钙作还原剂 ,由氧化物 (Tb4O7、Fe2 O3 )通过还原扩散法直接制得含铽为 4 0 %～ 5 8.5 % (质量百分数 )的铽铁 (Fe2 Tb)合金粉。与目前已有技术相比 ,本技术通过金属钙还原得到金属铽并立即扩散与还原铁形成一种金属间化合物Fe2 Tb ,因而具有无环境污染、生产成本低和合金中含铽量稳定的优点 ,可广泛用于永磁材料、磁光材料。

A method of preparing Fe 2Tb intermetallic compound alloy powder is presented.Using Ca as the reductant and after the diffusion-reduction reaction between Tb 4O 7 and Fe 2O 3,Fe 2Tb alloy powder in which Tb is 40%～58.5%(weight) can be made.Compared to the other methods used now, this method does not pollute the environment, and can cut down the cost, furthermore, the content of Tb in the alloy can be stable. The prepared alloy can be used widely in making permanent-magnet material, magneto-optic material and magnetostrictive material.