Influence of Magnesium Addition on Preparation of Nano-TiC Powder

In the experiment,TiC precursor was produced by sol-gel process using Ti（C₄H₉O）₄ and phenolic resin as titanium source and carbon source respectively.Then the so prepared TiC precursor was mixed with the catalyst of Mg powder to produce nano-TiC powder by carbothermic reduction process.The phase and morphology of samples were characterized by XRD and SEM.Generally,pure TiC powder can only be prepared from TiC precursor at 1 380 ℃ by carbothermic reduction process,but the test results indicate that as Mg powder is added and increased,the temperature of carbothermic reduction process can dramatically be lowered,so pure TiC powder can be produced at 1 200 ℃.The addition of Mg powder also reduces the proportion of carbon source in the reactants and restrains the growth of TiC grain.Thus,granularity of the TiC powder is uniform with the grain diameter around 50~100 nm.