压力与温度对α-Fe_2O_3纳米晶体结构的影响  

EFFECTS OF PRESSURE AND TEMPERATURE ON THE MICROSTRUCTURES OF NANOCRYSTALS α-Fe_2O_3

作　　者：李海波[1] 陈岗[1] 宫杰[2] 洪军[2] 余瑞璜[1] 

机构地区：[1]吉林大学,长春130023 [2]四平师范学院,四平136000

出　　处：《金属学报》1997年第7期769-773,共5页Acta Metallurgica Sinica

基　　金：中国科学院金属研究所快速凝固非平衡合金国家重点实验室及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，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。α-Fe2O3 ultrafine particles prepared with precipitation method were treated to form nanocrystals at various presures or temperatures, and their microstructures were studied by means of X-ray and Mbssbauer spectroscopy. The results indicate that high pressure affects mainly the structures of surface of micrograins and interface in nanocrystalline materials.

关 键 词：纳米晶体 晶格畸变 压力 温度 

分 类 号：O48[理学—固体物理]