Direct Synthesis of TiCr2 Powder by Calciothermic Co-reduction of their Oxides in Molten CaCl2
Direct Synthesis of TiCr2 Powder by Calciothermic Co-reduction of their Oxides in Molten CaCl2
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DOI：
10.5796/electrochemistry.73.724
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发表时间：
2005-08
期刊：
影响因子：
2.5
通讯作者：
R. Suzuki;H. Kitagawa
中科院分区：
文献类型：
--
作者：
R. Suzuki;H. Kitagawa
研究了一种从Cr2O3和TiO2氧化物混合物中直接合成金属间化合物TiCr2的新工艺。该方法结合了钙热共还原和副产物CaO在熔盐中的原位溶解。CaCl2熔体需要溶解CaO才能完全反应，还原和合金化在该介质中同时快速发生。然而，由于TiCr2的成分范围较窄，少量的钛和铬与-TiCr2共存。未发现高温形态-TiCr2，可能是由于其在冷却过程中分解为-TiCr2和Cr2。活化后的合金粉末表现出储氢能力。
A new process is studied to synthesize an intermetallic compound TiCr2 directly from the oxide mixture of Cr2O3 and TiO2. This method combines the calciothermic co-reduction and the in situ dissolution of the by-product CaO into the molten salt. The molten CaCl2 was needed to dissolve CaO for complete reaction, and the reduction and alloying occurred simultaneously and quickly in this media. Because of the narrow compositional range of TiCr2, however, a small amount of Ti and Cr coexisted with -TiCr2. The high temperature form, -TiCr2, was not found probably because it decomposed into -TiCr2 and Cr during cooling. The obtained alloy powder showed capability of hydrogen storage after activation.