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以钛酸四正丁酯为钛源制备超细Ti粉体

, PP. 830-834

Keywords: Ti(C1-xNx)粉体,钛酸四正丁酯,粒径,碳热还原,溶胶凝胶

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Abstract:

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。

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