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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 4    August 2001

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Carbonization kinetics of La2O3-Mo cathode materials
WANG Jin-shu(王金淑), ZHOU Mei-ling(周美玲), ZUO Tie-yong(左铁镛),
ZHANG Jiu-xing(张久兴), NIE Zuo-ren(聂祚仁), HU Yan-cao(胡延槽)

School of Materials Science and Engineering,
Beijing Polytechnic University, Beijing 100022, P.R.China

Abstract:The carbonization kinetics of La2O3-Mo cathode materials was studied by thermal analysis method. Three-stage model of the carbonization was presented. The carbonization rate is initially controlled by chemical reaction, then by chemical reaction mixed with diffusion, finally by diffusion. The experimental data are processed according to this model and the correlation coefficients of the kinetic curves are satisfactory. The apparent activation energy of carbonization of La2O3-Mo cathode materials was obtained. At the same time, the empirical expressions of the rate constant against temperature in the temperature range of 1393~1493K were deduced.

 

Key words: carbonization; cathode; kinetics

ISSN 1672-7029
CN 43-1423/U

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