论文部分内容阅读
以有机钛源钛酸四正丁酯(Ti(OC4H9)4)与纳米碳黑(C)为反应原料制备超细Ti(C1-xNx)粉体。经过计算可知两者理论质量比约为9.4∶1,以m(Ti(OC4H9)4)∶m(C)=9∶1混料,通过溶胶凝胶法制备烧结前驱体。利用高温碳热还原法,在N2气氛中,分别在不同温度下恒温烧结1h,直接反应合成超细Ti(C1-xNx)粉体。结果发现,随温度升高,x值逐渐降低,数值区间为0.19~0.72;产物组分中的总碳含量(Ct)逐渐增大,从14.23wt%增大到18.66wt%,游离碳含量(Cf)与氧含量(Co)均低于0.5wt%;产物平均粒度也呈增大趋势,平均粒度分布区间为220~275nm。
Ultrafine Ti (C1-xNx) powder was prepared by reacting Ti (OC4H9) 4 and nano-carbon black (C) with organic titanium source. After calculation, the theoretical mass ratio of the two is about 9.4: 1, and the precursor of sintering is prepared by the sol-gel method with the mixture of m (Ti (OC4H9) 4): m (C) = 9: 1. The high-temperature carbothermal reduction method was used to synthesize ultrafine Ti (C1-xNx) powders directly by sintering at different temperatures for 1 h at different temperatures respectively. The results showed that with the increase of temperature, the value of x decreased gradually and the value ranged from 0.19 to 0.72. The content of total carbon (Ct) increased gradually from 14.23wt% to 18.66wt%, and the content of free carbon Cf) and oxygen content (Co) were all less than 0.5wt%. The average particle size of the product also showed an increasing tendency. The average particle size distribution range was 220-275nm.