(昆明理工大学冶金系， 昆明 650093)
摘 要: 采用差热差重法研究了氧化亚锡分别在氩气流和氢气流中歧化和还原反应动力学。结果表明：在氢气流中氧化亚锡的歧化反应在673～1373K的温度范围内与其还原反应相比是优先进行的，而还原反应的速率过程可分别用成核长大和界面反应的非等温动力学模型描述。据此，提出了二氧化锡在不同温度范围内还原的表观机理， 例如在673～1373K为SnO2(s) SnO(s) SnO(1) 。
关键字: 动力学 歧化还原 SnO(s) SnO2(s)
（Department of Metallurgy,Kunming University of Science and Technology, Kunming 650093, P. R. China）
Abstract:The kinetics of disproportionation and reduction of stannous oxide in a flow of argon and in a flow of hydrogen has been investigated by TG and DTA techniques. The results showed that in a flow of hydrogen the disproportionation reaction of stannous oxide speeds prior to its reduction in a range of 673～1373K, whereas the rate processes of reduction of stannous oxide can be respectively described by the nucleation growth model and the interfacial reaction model of nonisothermal gas-solid reactions. Based on the results, the apparent mechanisms of reduction of stannic oxide have been suggested in different temperature ranges, for example, in arange of 673～1373K as SnO2(s) SnO(s) SnO(1) .
Key words: kinetics disproportionation and reduction SnO(s) SnO2(s)
