真空碳热还原法制备高纯TiB_2粉末  

Preparation of High Purity TiB_2 Powder By Vacuum Carbothermic Reduction

作　　者：宋文杰[1] 钟晖[1] 袁艳[1] 杨建文[1] 戴艳阳[1] 钟海云[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《稀有金属与硬质合金》2006年第1期9-13,17,共6页Rare Metals and Cemented Carbides

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.

关 键 词：真空 TiB2粉末 碳热还原 制备 

分 类 号：TF123.121[冶金工程—粉末冶金]