高压处理的α－Fe_2O_3超微粒的X射线衍射研究  

THE X RAY DIFFRACTION STUDIES OF α Fe 2O 3 ULTRAFINE PARTICLES TREATED BY HIGH PRESSURE

作　　者：李海波[1,2] 郑伟涛[1,2] 宫杰[1,2] 左云彤[1,2] 余瑞璜[1,2] 

机构地区：[1]吉林大学材料科学系 [2]四平师范学院物理系

出　　处：《高压物理学报》1996年第3期176-181,共6页Chinese Journal of High Pressure Physics

基　　金：中国科学院金属所快速凝固非平衡合金国家开放实验室;吉林省科学技术委员会资助

摘　　要：采用沉淀法制备了α－Ｆｅ２Ｏ３超微粒，将超微粒粉末在不同温度下进行了高压处理，利用Ｘ射线衍射，ＴＥＭ和穆斯堡尔谱学对高压处理前后的样品进行了研究。结果表明，室温下压力对微晶的晶粒尺寸没有产生明显的影响，热压使晶粒尺寸有较大增长。? Fe 2O 3 ultrafine particles were prepared with precipitation method and treated by high pressure at various temperatures.The samples were studied by X ray,TEM and Mossbauer spectroscopy.The results indicate that the high pressure has no obvious influence on the size of microcrystals at room temperature,but the grain size of microcrystals increase greatly at the condition of 4.0GPa and 400℃.Also,the high pressure mainly influence the orientation and lattice distortion of microcrystals.

关 键 词：超微粒 高压 晶格畸变 取向 三氧化二铁 

分 类 号：O521.2[理学—高压高温物理]