SU Haifeng, GAO Jiali, WEN Yanxuan, et al. Kinetics of hausmannite preparation by thermal decomposition of manganese sulfate[J]. CIESC Journal, 2008, (2): 359-365.
SU Haifeng, GAO Jiali, WEN Yanxuan, et al. Kinetics of hausmannite preparation by thermal decomposition of manganese sulfate[J]. CIESC Journal, 2008, (2): 359-365.DOI:
In order to get the mechanism of hausmannite prepared by the decomposition of manganese sulfate in air
the thermal decomposition behavior of manganese sulfate was studied with TG-DSC and XRD
and the kinetics of dehydration and decomposition was studied with non-linear iso-conversional method and the universal integral method.Mampel Power principle G(α)=α3/2 was used to describe the dehydration kinetics of manganese sulfate between 200℃ and 400℃.The average activation energy of the dehydration was calculated to be 117.11 kJ·mol-1.MnSO4 was decomposed to form Mn3O4 while the temperature was between 750℃and 1050℃.The decomposition kinetics could be described as G(α)=1-(1-α)1/2
and its average activation energy was 226.44 kJ·mol-1.The result of isothermal decomposition kinetics of manganese sulfate agreed with its non-isothermal kinetics by TG-DSC analysis.