摘要
在In C O体系中存在C(graphite) ,CO(g) ,CO2 (g) ,O2 (g) ,In(l) ,In(g) ,In2 O(g)和In2 O3 (s)等物种 ,反应体系的独立反应数为 5。用Mathematica程序求得部分反应的ΔG ,热力学计算得到 773～ 2 0 0 0K各气相分压与温度的关系 ,In2 O3 还原挥发的最低温度是 10 30K ,当T >974K时 ,In2 O3 更容易被C还原 ,还原为In比还原为In2 O容易。结果表明 :In2 O3 还原挥发物的主要成分是In(g)和In2 O(g) ,当 773K <T <15 2 9K时 ,pIn>pIn2 O;升高温度对氧化铟的还原挥发有利 ,pO2 对
There are eight species in the system In-C-O. The number of the independent reactions is five. The Gibbs' free energy changes of partial reactions were gained by Mathematica program designed. The relations between the partial pressure of each gas and temperature were achieved. The deoxidization and volatilization of In 2O 3 can't occur spontaneously until the temperature reaches 1?030?K. Beyond 974?K, In 2O 3 can be deoxidized by C easilier than by CO and deoxidized to In easilier than In 2O. The results show that In(g) and In 2O(g) are the main gaseous species over In 2O 3. The volatilization rate of In 2O 3 rises along with the temperature. p eff is affected by p O 2 is not so markedly.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2002年第3期592-595,共4页
The Chinese Journal of Nonferrous Metals
关键词
氧化铟
碳
还原挥发
热力学
In 2O 3
C
deoxidization and volatilization
thermodynamic
