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以TiO2和制粒碳为原料,采用搅拌球磨-碳氮化工艺,在N2气氛中,通过碳热原位还原-化合反应,制备Ti(C1-x,Nx)粉末。研究了3种反应温度(1 600、1 700℃和1 800℃)和4组原料粉末摩尔比(n(C)/n(Ti)=2.3、2.4、2.5和2.6)对Ti(C1-x,Nx)粉末的物相、化学成分和粒度的影响。结果表明,在实验条件下制备的粉末均为单一物相成分;随反应温度升高和n(C)/n(Ti)增大,Ti(C1-x,Nx)粉末的x值随之降低;1 600℃条件下,当n(C)/n(Ti)为2.4时,合成的Ti(C1-x,Nx)粉末近似化学式为Ti(C0.41,N0.59),O和Cf含量均为0.25%,平均粒径约为0.7μm;1 700℃条件下,当n(C)/n(Ti)为2.6时,合成的Ti(C1-x,Nx)粉末近似化学式分别为Ti(C0.59,N0.41),O和Cf含量分别为0.13%和0.31%,平均粒径约为0.8μm。在此工艺条件下,制备的粉末各项综合性能指标相对较好。
Ti (C1-x, Nx) powder was prepared by situ reduction and compound reaction of carbothermal in N2 atmosphere with TiO2 and granulated carbon as raw materials. The effects of three reaction temperatures (1 600, 1 700 ℃ and 1 800 ℃) and four groups of raw material powders (n (C) / n (Ti) = 2.3, 2.4, 2.5 and 2.6) , Nx) powder phase, chemical composition and particle size. The results show that the powders prepared under the experimental conditions are single phase components. With the increase of reaction temperature and the increase of n (C) / n (Ti), the x value of Ti (C1-x, Nx) ; At 600 ℃, the approximate chemical formula of Ti (C0.41, N0.59), O and Cf content of Ti (C1-x, Nx) And the average particle size was about 0.7μm. The approximate chemical formulas of Ti (C1-x, Nx) powders were Ti (1, C0.59, N0.41). The contents of O and Cf were 0.13% and 0.31%, respectively. The average particle size was about 0.8μm. In this process conditions, the comprehensive performance of the prepared powder relatively good indicators.