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The thermal decomposition kinetics of strontium nitrate, Sr(NO3)2 was studied by thermogravimetry using non-isothermal experiments. For the kinetic analysis, the TG/DTG data obtained in the temperature range 30-850 ºC at different heating rates (5, 10, 15 and 20 K/min) in the nitrogen atmosphere were processed by model fitting and model free methods. The thermal decomposition of Sr(NO3)2 occurred in a single stage without the formation of intermediate nitrite. The average apparent activation energies of thermal decomposition of Sr(NO3)2 as determined by Straink, Flynn-Wall-Ozawa, KAS and Friedman methods are 344.37, 341.39, 344.05 and 362.62 kJ/mol, respectively. The value of the invariant activation energy (344.83 kJ/mol) obtained by Invariant kinetic parameter method is in a good agreement with integral isoconversional methods. The appropriate conversion model of the process selected by means of the master plot method is "Diffusion model (D4)".

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