(昆明理工大學(xué)冶金系， 昆明 650093)
摘 要: 采用差熱差重法研究了氧化亞錫分別在氬氣流和氫氣流中歧化和還原反應(yīng)動力學(xué)。結(jié)果表明：在氫氣流中氧化亞錫的歧化反應(yīng)在673～1373K的溫度范圍內(nèi)與其還原反應(yīng)相比是優(yōu)先進(jìn)行的，而還原反應(yīng)的速率過程可分別用成核長大和界面反應(yīng)的非等溫動力學(xué)模型描述。據(jù)此，提出了二氧化錫在不同溫度范圍內(nèi)還原的表觀機(jī)理， 例如在673～1373K為SnO2(s) SnO(s) SnO(1) 。
關(guān)鍵字: 動力學(xué) 歧化還原 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)
