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以硫酸亚铁为原料,用沉淀法合成γ-Fe_2O_3超微粉末,用DTA差热分析研究了在不同气氛下,羟基氧化铁分解过程及γ-Fe_2O_3的热稳定性.对不同热处理氧化铁的组成、结构、粒径进行了分析.根据样品随温度的变化情况,提出了可能的相变机理.
Using ferrous sulfate as raw material, the γ-Fe 2 O 3 ultrafine powder was synthesized by precipitation method and the decomposition process of hydroxy iron oxide and the thermal stability of γ-Fe 2 O 3 under different atmosphere were studied by DTA differential thermal analysis. Composition, structure and particle size were analyzed.A possible phase transition mechanism was proposed according to the change of sample with temperature.