Study on Carbothermic Reduction of Titanium Diozide in Vacuum
The thermodynamic calculation for carbothermic-reduction of titanium dioxide at different system pressure was carried out, the results indicated that TiO2 is reduced by carbon will be easy to produce TiC at the system pressure lower than normal pressure. Low system pressure will conduce reactions to move towards direction increasing gas and Ti will be produced at the temperature higher than 1600K when Psys =10Pa. On the basis of above calculation, carbothermic-reduction process of titanium dioxide was investigated by X-ray diffraction and self-made electric resistance determination device. The results indicated there were TiC、 TiO and Ti2O3 in reduction slag, but no any metal Ti was produced without regardless of molar ratio of TiO2 and C at the reduction temperature higher than 1673K and Psys?10Pa. Carbothermic-reduction process of titanium dioxide should pass the way of TiO2→Ti3O5→Ti2O3→TiO (TiC) with reduction temperature rising. Both diffraction peaks of TiO and those of TiC have somewhat offset maybe implies to have formed continuous solid solution of TiO-TiC. Electric resistivities of reduction slags are remarkably less than that of raw material and the reduction slag produced at lower reduction temperature have better electrical conductivity.
Carbothermic-reduction Titanium diozide Vacuum metallurgy Continuous solid solution
XU Bao-qiang YANG Bin HE Jian-ping SENG Wei DAI Yong-nian LIU Da-chun
National Engineering Laboratory for Vacuum Metallurgy, Kunming 650093, PR.China Key Laboratory of Va National Engineering Laboratory for Vacuum Metallurgy, Kunming 650093, PR.China Key Laboratory of Va YunNan XinLi Nonferrous Metal Limited Company, Kunming 650093, PR.China
国际会议
沈阳
英文
499-505
2009-08-24（万方平台首次上网日期，不代表论文的发表时间）