无机材料学报2016，Vol.31Issue(3)：324-328,5.DOI:10.15541/jim20150524
低温固相反应合成纳米级TiB2-TiC复合粉体
Low-temperature Solid-state Synthesis of Nanometer TiB2-TiC Composite Powder
摘要
Abstract
TiB2-TiC composite powders were prepared at low temperature in the Ti-B system with the PTFE polytetra-fluoroethylene (polytetrafluoroethylene) as a chemical activator. Reaction temperature, phase composition and mor-phology were measuredvia differential thermal analysis, X-ray diffraction and field emission scanning electron mi-croscopy (FESEM) in order to explore the reaction mechanism, respectively. Actual solid-state reaction synthesis ex-periments were carried out for the same composition in an argon atmosphere furnace. It was found that TiB2-TiC composite powder could be synthesized successfully at 550℃ by adding 10wt% PTFE into the initial reactant Ti-B mixture. The FESEM image showed that the average size of the product was smaller than 400 nm. According to dif-ferential thermal analysis results, the combustion synthesis mainly includes two reaction processes: firstly, the initial reaction between titanium and PTFE particles resulting in great amounts of heat release; subsequently, the released en-ergy triggers the solid-state reaction between titanium and boron particles to form TiB2.关键词
TiB2-TiC/固相合成/PTFE/反应机理Key words
TiB2-TiC/solid-state synthesis/PTFE/reaction mechanism分类
化学化工引用本文复制引用
鱼银虎,汪涛,廖秋平,缪润杰,潘剑锋,张度宝..低温固相反应合成纳米级TiB2-TiC复合粉体[J].无机材料学报,2016,31(3):324-328,5.基金项目
Central University Basic Research and Operating Expenses of Special Funding(NP2012303) （NP2012303）
