A kinetic study of indium nitride formation from indium oxide powders

Indium oxide powders were reacted in flowing ammonia at various temperatures and times to form indium nitride (InN), and the kinetics of the oxide- to- nitride reaction was quantitatively determined by X-ray diffraction analysis. The quantity of the InN phase formed increased expectedly at higher temperatures and longer times showing a stretched-out exponential dependence. The reaction rate constant at a given temperature was determined using the Avrami equation. The activation energy for the reaction was calculated to be 164.5 KJ mol−1 in the temperature range of 580–650 °C and the Avrami constant varied between 1.56 and 2.8.