The thermal decomposition behaviors of 3 4 5-triamino-1 2 4-triazole nitrate were studied using a C-500 type Calvet Micro-calorimeter at four different heating rates Its apparent activation energy and pre-exponential factor of exothermic decomposition reaction are 137 16 kJ mol(-1) and 10(10 03) s(-1) The critical temperature of thermal explosion is 441 37K The entropy of activation (Delta S-#) enthalpy of activation (Delta H-#) and free energy of activation (Delta G(#)) of the decomposition reaction are -65 65J mol(-1) K-1 132 97 kJ mol(-1) and 166 35 kJ mol(-1) respectively The self-accelerating decomposition temperature (T-SADT) is 429 56 K The specific heat capacity was determined with a Micro-DSC method and a theoretical calculation method Specific heat capacity (J g(-1) K-1) equation is C-p = 0 356 + 2 957 x 10(T)(-3) (283 1 K < T< 353 2 K) The adiabatic time-to-explosion is calculated to be a certain value between 702 22s and 712 22s The critical temperature of Hot-Spot initiation is 600 325 C and the characteristic drop height of impact sensitivity (H-50) is 27 cm (C) 2010 Elsevier B V All rights reserved