碳热还原法制取碳氮化钛的热力学原理分析  

A Thermodynamics-Based Analysis of Making Titanium Carbonitride Through Carbon Thermal Reduction

作　　者：方民宪[1] 彭金辉[2] 陈厚生[1] 陈德明[1] 

机构地区：[1]攀枝花钢铁研究院,四川攀枝花617000 [2]昆明理工大学材料与治金工程学院,云南昆明650093

出　　处：《昆明理工大学学报（理工版）》2006年第5期6-13,共8页Journal of Kunming University of Science and Technology(Natural Science Edition)

基　　金：国家"863"资助项目(项目编号:2003AA33X210)

摘　　要：分析碳热还原法制取Ti(C,N)的热力学原理,结果表明,合成过程伴随着相变,当TiO2颗粒和C颗粒均匀混合时,还原反应主要依赖于CO/CO2传质的气固反应,当TiO2颗粒表面被C包膜时,主要是碳和钛氧化物之间的固固反应.升高温度有利于还原进行,钛氧化物的开始还原温度随气相中的CO分压降低而降低,但Ti(C,N)中的C,N含量则取决于温度和N2压力.Thermodynamic principle of making Ti （ C, N） by carbon - heat reducing is analyzed. The result shows that synthesizing process is accompanied by phase change. When TiO2 and carbon grain are mixed, the reductive reaction mainly depends on CO/CO2 gas - solid transmitted reaction. When the surface of TiO2 particle is enveloped by carbon , the reduction is mainly solid - solid reaction between carbon and titanic oxide. Raising temperature is conducive to reducing process. The starting - reduction temperature of titanic oxide goes down with the decrease of partial pressure of CO. But the content of C, N in Ti （ C, N） depends on the temperature and partial pressure of N2.

关 键 词：碳氮化钛 碳热还原 热力学 

分 类 号：TF803.13[冶金工程—有色金属冶金]