摘要
以二氧化钛、硼酸和不同碳源(炭黑、蔗糖、葡萄糖)为原料,用碳热还原法合成了TiC–TiB_2复合粉末。研究了不同种类碳源及反应温度对TiC–TiB_2复合粉末的影响。用X-射线衍射仪、激光粒度分析仪和扫描电子显微镜对样品的物相组成、晶粒尺寸及颗粒形貌进行了分析。结果表明:以炭黑、葡萄糖为碳源合成TiC–TiB_2复合粉末的适宜宜条件为在1400℃保温2h;以蔗糖为碳源合成TiC–TiB_2复合粉末的适宜条件为在1350℃保温2h。在最适宜反应温度下,以炭黑为碳源合成的TiC–TiB_2复合粉末样品粒径最小,且颗粒之间相互团聚较少,大部分颗粒尺寸在100nm左右。
TiC-TiB2 composite powders were synthesized by a carbothermal reduction method with titanium dioxide, boric acid and different carbon sources （i.e., carbon black, sucrose and glucose） as raw materials. The effects of carbon source type and reaction temperature on the synthesis performance of TiC-TiB2 composite powders were investigated. The phase composition, grain size and morphology of TiC-TiB2 composite powders were investigated by X-ray diffractometer, laser granularity meter and scanning electron microscope. The results show that TiC-TiB2 composite powders can be synthesized under optimum condition （i.e., 1 400 ℃ for 2 h using carbon black and glucose as a carbon source and 1 350 ℃ for 2 h using sucrose as a carbon source）. TiC-TiB2 composite powders possess the smallest particle size when carbon black is used as a carbon source at the optimum reaction temperature. The particles of TiC-TiB2 composite powders are dispersive and the particle size is about 100 nm.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2016年第3期408-413,共6页
Journal of The Chinese Ceramic Society
基金
湖南省教育厅科研重点项目(15A097)资助
关键词
碳化钛–硼化钛
复合粉末
碳热还原
合成
titanium carbide-titanium diboride
composite powder
carbothermal reduction
synthesis
