真空原位碳热还原法制备纳米碳化钛粉体
发布时间：2018-11-20 12:48
【摘要】：分别以钛酸四丁酯和蔗糖为钛源、碳源,采用溶胶—凝胶法制备前驱体并在真空条件下原位碳热还原制备纳米碳化钛。采用X射线衍射仪和扫描电镜对产物物相、形貌进行分析,并根据谢乐公式计算所得TiC晶粒尺寸。结果表明:在1 300℃的真空碳热还原条件下能够得到纳米碳化钛,随着碳含量的增加碳化钛的纯度提高,晶粒尺寸减小;随碳热还原温度从1 300℃升高到1 500℃,碳化钛的形貌由长径为100 nm左右的长条状变为粒径为20~30 nm的球形颗粒,但TiO相含量相对增加。
[Abstract]:The precursor was prepared by sol-gel method using tetrabutyl titanate and sucrose as titanium source and carbon source respectively. Nanocrystalline titanium carbide was prepared by in-situ carbothermal reduction under vacuum condition. The phase and morphology of the product were analyzed by X-ray diffractometer and scanning electron microscope, and the TiC grain size was calculated according to Xie Lecong formula. The results show that nanocrystalline titanium carbide can be obtained under the condition of vacuum carbothermal reduction at 1 300 鈩，
本文编号：2344956
[Abstract]:The precursor was prepared by sol-gel method using tetrabutyl titanate and sucrose as titanium source and carbon source respectively. Nanocrystalline titanium carbide was prepared by in-situ carbothermal reduction under vacuum condition. The phase and morphology of the product were analyzed by X-ray diffractometer and scanning electron microscope, and the TiC grain size was calculated according to Xie Lecong formula. The results show that nanocrystalline titanium carbide can be obtained under the condition of vacuum carbothermal reduction at 1 300 鈩，
本文编号：2344956
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