Add time:08/03/2019         Source:sciencedirect.com

Kinetics of the thermal decomposition of un-irradiated (pristine) and pre-γ-irradiated hydrated gadolinium acetate was studied within the temperature range (603–623 K) and in air using isothermal and dynamics thermogravimetric techniques. The data were analyzed using various solid-state reaction models. Integral method using Coat–Redfon equation was applied in dynamic data analysis. The results showed that the kinetic of isothermal and non-isothermal (dynamic) decomposition for acceleratory stage was governed by phase boundary process. The activation energies for pristine and pre-irradiated samples were calculated and the results of the isothermal and dynamic decomposition integral methods were compared and discussed. Thermodynamic values of the main decomposition process were calculated and evaluated.

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