Effects of Mechanical Activation Factors on Synthesis of Nano-TiC by TiO_2 Carbothermal Reduction Reaction

Nano TiC powder was synthesized from nano-TiO2 /carbon black mixtures by mechanical activation and subsequent Carbothermal Reduction(CR) reaction.Th effects of main mechanical activation factors on TiO2 CR reaction were investigated.The results indicate that longer milling time,bigger ball to powder weight ratio and higher milling speed is beneficial to TiO2 CR reaction,meanwhile,(Fe,C) impurities in TiC product also increase.Based on the analysis of influencing factors,the appropriate activation parameters are as follows: milling time of 4 ～8 h,ball-to-powder weight ratio of 10∶1,milling speed of 250 r/min.