The thermite reaction stated from melting of Al particles, the melting results in dissolving of the Fe2O3 particles into the Al liquid, and Al2O3-FeO precipitated from supersaturated Al liquid.

• 铝热反应以Al粉粒熔化为先导，Al粉粒的熔化导致Fe2O3粉粒向Al液中部分溶解，并从过饱和的Al液中析出Al2O3-FeO相。