Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (07): 1095-1098.doi: 10.3866/PKU.WHXB20070725

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Thermal Decomposition Kinetics of ZnSn(OH)6

ZHANG Yu-Dong; LI Bin-Jie; XU Xiang-Min; LI De-Liang   

  1. College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475001, Henan Province, P. R. China; Laboratory for Special Functional Materials, Henan University, Kaifeng 475001, Henan Province, P. R. China
  • Received:2006-12-27 Revised:2007-03-20 Published:2007-07-03
  • Contact: ZHANG Yu-Dong E-mail:zyd71@henu.edu.cn

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Abstract: The thermal decomposition processes of ZnSn(OH)6 were studied using TG/DTG at various heating rates of 2.5, 5.0, 10.0, 15.0, 20.0 K·min -1. The results showed that the decomposition proceeded through one step in nitrogen atmosphere at the temperature range from 298 to 873 K. A good agreement was found between the mass loss of the thermal decomposition of ZnSn(OH)6 and the theoretical mass loss. The thermal decomposition kinetics was investigated employing non-isothermal multiple scanning method. The activation energy for the decomposition reaction of ZnSn(OH)6 was determined to be E=128.77 kJ·mol-1 in nitrogen atmosphere and the pre-exponential factor of its kinetics equations was calculated to be lg(A/s-1)=10.61. The mechanism function was obtained to be Mample Power theorem.

Key words: TG/DTG, Thermal decomposition, Mechanism, Kinetics

MSC2000: 

  • O642