摘 要: 采用室温固相法合成了γ-Fe ₂O₃ 的前驱体FeC₂O₄·2H₂O 及纳米γ-Fe₂O₃。以FeSO₄·7H₂O和H₂C₂O₄·2H₂O为原料，先得到 了前驱体 FeC₂O₄·2H₂O，通过对反应机理的初步探讨，并研究其 物质结构、分解过程和合适煅烧温度，最后在 4 00℃下煅烧前驱 体3 h得到γ-Fe₂O₃纳米粒子。经热重(TG-DTA)、X射线衍射（XRD） 和透射电镜（TEM）测试手段的分析，结果表明：室温固相法 合成纳米γ-Fe ₂O₃ 产物γ-Fe ₂O₃ 纯净、粒子为纳米级且分布均匀。 

关键词: 纳米γ - Fe ₂O₃ ；固相反应；前驱体

Abstract: The FeC₂O₄·2H₂Oprecursor and γ-Fe₂O₃ nanoparticlewere prepared by solid-state reaction at room temperature. The FeC₂O₄· 2H₂O precursor was prepared with FeSO₄·7H₂O and H₂C₂O₄·2H₂O. By the primary study of reaction mechanism and structure, decomposition, and appropriate calcining heat, the synthesis of γ - Fe₂O₃ nanoparticle was achieved by thermal decomposition of FeC₂O₄· 2H₂O precursor 3 h at 400 ℃.The nanoparticle was characterized by TG-DTA, X-ray diffraction(XRD)and transmission electron microscope(TEM).The results showed that the γ-Fe₂O₃ nanoparticles synthesed by solid-state reaction were pure and well-distributed. 

Keywords: nano-sized ferric oxide;solid-state reaction; precursor