摘要
在对碳热还原反应TiO2+B2O3+5C→TiB2+5CO↑进行热力学计算的基础上,采用真空碳热还原TiO2和B2O3的方法,制备出了纯度达99.34%的TiB2粉末。研究结果表明:采用真空碳热还原法制取TiB2粉末可降低实际反应温度200℃左右;真空环境是保证获得高纯TiB2粉末的重要条件;C还原剂的适当过量能显著提高产物TiB2的纯度。
In this paper, TiB2 powder of 99.34% purity is prepared by vacuum carbothermic reduction of TiO, and B2O3 based on the thermodynamics analysis of the reaction TiO2＋B2O3＋5C→TiB2＋5CO↑ The investigation results show that the actual reaction temperature can be decreased by about 200℃ by vacuum carbothermic reduction for TiB2preparation. Vacuum is very important for high purity TiB2 powder,while excessive amount of carbon in proper ratio can remarkably, enhance TiB2 purity.
出处
《稀有金属与硬质合金》
CAS
CSCD
2006年第1期9-13,17,共6页
Rare Metals and Cemented Carbides
关键词
真空
TiB2粉末
碳热还原
制备
vacuum
TiB2 powder
carbothermic reduction
preparation
