Abstract
A new method of the multiple rates isotemperature is proposed to define the most probable mechanismg(α) of thermal anlaysis; the iterative isoconversional procedure has been employed to estimate apparent activation energyE; the pre-exponential factorA is obtained on the basis ofE andg(α). By this new method, the thermal analysis kinetics triplet of dehydration of cobalt oxalate dihydrate is determined, apparent activation energyE is 99.84 kJ·mol−1; pre-exponential factorA is 3.427×109–3.872×109 s−1 and the most probable mechanism belongs to nucleation and growth,A m model, the range ofm is from 1.50 to 1.70.
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Foundation item: Supported by the Key Foundation of the Science and Technology Committee of Hubei Province (2001ABA009)
Biography: Li Li-qing (1977-), female, Master candidate, research direction: material synthesize and thermal analysis kinetics.
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Li-qing, L., Dong-hua, C. Description of mechanism function about dehydration of cobalt oxalate dihydrate by multiple rates isotemperature method. Wuhan Univ. J. Nat. Sci. 9, 239–246 (2004). https://doi.org/10.1007/BF02830610
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DOI: https://doi.org/10.1007/BF02830610
Key words
- multiple rates isotemperature method
- isoconversional method
- cobalt oxalate dihydrate
- accomodation function
- differential scanning calorimetry (DSC)