After reduction-nitridation, most of Fe2O3 were turned into ferro and ferrous oxide with spherical shape except 0.4% Fe2O3 solutionizing in Sialon crystal.

• Fe_2O_3除了极少量(0.；4%25)固溶进Sialon晶格外；大部分以园球状的金属铁、氧化亚铁存在。