铁氧体纳米晶声化学制备和微结构HRTEM研究  

Sonochemical synthesis and microstructure HRTEM studies of ferrites nanocrystallines

作　　者：朱健民[1] 黄石松[1] 周舜华[1] 马国斌[1] 

机构地区：[1]南京大学固体微结构物理国家实验室物理系,江苏南京210093

出　　处：《电子显微学报》2005年第1期39-45,共7页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学创新群体基金资助项目(No 10021001);国家自然科学基金资助项目(No 50202008)~~

摘　　要：应用声化学方法,分别以FeCl2 尿素、ZnCl2 FeCl2 尿素、FeCl2 FeCl3 尿素水溶液作为前期反应物获得Fe3O4、ZnxFe3-xO4、α Fe2O3纳米晶,结合XRD、TEM、SAED、HRTEM表征手段对产物进行了研究。对纳米晶声化学形成机理和微结构演化过程进行了分析、讨论,并对铁氧体的微结构与磁、电性能之间的关系加以探讨。By means of sonochemical method,Fe_3O_4,ZnFe_2O_4 and α-Fe_2O_3 nanocrystallines were synthesized from FeCl_2/urea,ZnCl_2/FeCl_2/urea and FeCl_2·4H_2O/FeCl_3/urea solutions,correspondingly.The products were characterized by powder X-ray diffraction (XRD) and transmission electron microscopy (TEM) as well as selected area electron diffraction (SAED).Special attention was paid to the microstructure of the nanocrystallines using high-resolution transmission electron microscopy (HREM).Probable mechanisms for the sonochemical formation of ferrites nanocrystallines were discussed.

关 键 词：尿素 HRTEM ZNCL2 纳米晶 声化学 Α-FE2O3 制备 微结构 反应物 表征 

分 类 号：TB383[一般工业技术—材料科学与工程]