Abstract:
Thermogravimetric analysis data were used to determine the activation energy $E=205.9$ kJ/mol, the pre-exponential factor $A = 2.275\cdot10^{-15}$ m$^3$/s, and the order of the reaction with respect to the oxidizer $m=1$ for the oxidation of an aluminum diboride particle leading to the formation of aluminum borate on the surface. The ignition conditions for a single particle of aluminum diboride in air were estimated using the theory of ignition of metal particles proceeding by the thermal explosion mechanism. It is shown that a consequence of the formation of aluminum borates in the induction period is a strong positive dependence of the ignition temperature of particles on their size and the partial pressure of oxygen.