Influence of the pressure of the oxidative medium and the oxygen concentration on the ignition of single magnesium particles

The experimental dependence of the critical ignition temperature on the particle size is obtained. It is shown that the use of formal kinetics permits the description of each such dependence by two pairs of constants (the activation energy and the preexponential factor) which are fundamentally different for temperatures of the medium above and below the melting point of magnesium. For practical purposes, empirical dependences permitting the calculation of the ignition conditions with different oxygen partial pressures are proposed.