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采用沉淀法制备了α－Fe2O3超微粒，在不同的温度和压力下对超微粒粉末进行处理，利用X射线衍射和M5ssbauer谱对高压处理前后的样品进行了分析结果表明，压力主要对微晶的表面或纳米晶体的界面结构产生影响，使晶格畸变或无序程度增加
The α-Fe2O3 ultrafine particles were prepared by precipitation method. The ultrafine particles were treated under different temperature and pressure. The X-ray diffraction and M5ssbauer spectra were used to analyze the samples before and after high-pressure treatment. The results show that the pressure is mainly on the microcrystalline Surface or nanocrystal interface structure affect the lattice distortion or disorder increased degree