亚微米氮化钛陶瓷粉末的燃烧合成实验研究

The Combustion Synthesis of Fine Titanium Nitride Powders

对ＴｉＯ＿２在氮气中的Ｍｇ热反应制备ＴｉＮ粉末的方法进行了试验研究。结果表明，ＴｉＮ的转化率受Ｍｇ粉加入量、反应物初始密度、ＭｇＯ稀释剂和含氮化合物加入量的影响，且其影响作用依次递减；加入ＭｇＯ可以明显改善ＴｉＮ颗粒形态、粒径和分布，使其从多边形颗粒变为球形颗粒。通过工艺优化获得了球形窄筛分ＴｉＮ微粉（０．２～１．０μｍ）．

An experimental investigation of prepnring fine TiN powders by Mg-thermic of TiO_2 under nitrogen gas is carried out . The conversion rate of TiN is influenced by the addi-tion of Mg reducing agent ,the initial density of reactant mixture , and the addition of MgO dilute and nitrogen compounds .And their influence is decreased progressively in sequence the morphology of TiN particles can be improved from polygon grain to spherical one by theaddition of MgO. In the end, the spherical and narrow distributed TiN powders (0.2～1.0μm)are obtained by the optimization of parameters.