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以钛白粉和石墨为原料,开展TiO2/C真空碳热还原试验,考察配碳比对TiO2/C真空碳热反应历程和还原产物的影响。研究结果表明:TiO2/C真空碳热还原表现出阶段性反应特征,各阶段反应程度取决于配碳比;不同配碳比还原产物的表观差异在于游离碳含量及其赋存状态;随着配碳比升高还原产物颗粒尺寸减小、孔隙率增大;不同配碳比还原产物的电阻率介于2.61×10-3～4.20×10-3Ω.cm,导电性能介于导体和半导体之间。
Titanium dioxide and graphite as raw materials to carry out TiO2 / C vacuum carbothermal reduction test to investigate the effect of carbon ratio on the TiO2 / C vacuum carbothermal reaction process and the reduction product. The results show that the vacuum carbothermal reduction of TiO2 / C exhibits periodic reaction characteristics, and the degree of reaction in each stage depends on the ratio of carbon to carbon. The apparent difference between the products with different ratios of carbon to carbon is the content of free carbon and its state of occurrence. With the increase of carbon ratio, the size of the reduced product decreases and the porosity increases. The resistivity of the reduced products with different carbon ratios ranges from 2.61 × 10-3 to 4.20 × 10-3Ω.cm and the conductivity is between that of conductors and semiconductors between.