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通过调节p H值和添加分散剂(聚丙烯酸),对微波合成Ti C的原料Ti O2和乙炔炭黑进行表面改性处理,将处理后的原料通过湿磨混料,并在微波窑中利用碳热还原反应合成Ti C粉体。利用Zeta电位测试、X射线衍射、激光粒度分析等手段,研究p H值、分散剂、球磨等原料表面改性及混料工艺对微波合成Ti C粉体的物相组成、化学计量、粒度分布的影响。结果表明:Ti O2和乙炔炭黑的较佳改性p H值均为4,其较佳分散剂用量分别是2.4 wt%和9.0 wt%;湿磨混料的较佳时间为6 h;与未经表面改性处理相比,原料经表面改性处理后,微波合成Ti C粉体的温度较低(合成温度降低150℃),粉体粒度较小,化学计量更准确。
By adjusting the p H value and adding dispersant (polyacrylic acid), the Ti Ti raw materials Ti O2 and acetylene black synthesized by microwave are subjected to surface modification treatment, the treated raw materials are passed through a wet grinding compound and used in a microwave kiln Carbothermal reduction synthesis of Ti C powder. The phase composition, stoichiometry and particle size distribution of microwave-synthesized TiC powder were studied by means of Zeta potential test, X-ray diffraction and laser particle size analyzer. The effects of surface modification of p H value, dispersant, Impact. The results show that the optimum modified p H values of Ti O2 and acetylene black are both 4, the optimum dispersant dosage is 2.4 wt% and 9.0 wt%, respectively; the best time of wet milling is 6 h; and Compared with the surface modification, the temperature of the TiC powder synthesized by microwave irradiation is lower (the synthesis temperature is reduced by 150 ℃) and the particle size is smaller and the stoichiometry is more accurate.