铁酸钴纳米粉体的水热合成及其性能  

HYDROTHERMAL SYNTHESIS AND MAGNETIC PROPERTIES OF CoFe_2O_4 NANO-POWDER

作　　者：莫伟锋[1] 翟继卫[1] 姚熹[1] 

机构地区：[1]同济大学功能材料研究所,上海200092

出　　处：《硅酸盐学报》2009年第7期1147-1152,共6页Journal of The Chinese Ceramic Society

基　　金：国家'973'计划(2002CB613304);上海市科委重点基础研究(06JC14070);上海市科学技术委员会(07DZ22302)资助项目

摘　　要：采用水热法制备了CoFe2O4纳米粉体,利用X射线衍射、红外吸收光谱等方法对合成的样品进行了结构及性能表征。研究了水热合成条件对产物物相及显微结构的影响规律,并对水热制备的CoFe2O4纳米粉体进行后期热处理,探索了羟基对其饱和磁化强度、矫顽场强等磁学性能的影响。结果表明:采用优化的条件制备的CoFe2O4纳米粉体颗粒在70nm左右,其表面羟基的减少有利于其磁性能的提高。CoFe2O4 nano-powders were synthesized by hydrothermal method. The structure and magnetic properties of the obtained CoFe2O4 nano-powders were characterized by X-ray diffraction, transmission electron microscopy, Fourier transform infrared trans- mission spectroscopy and vibrating sample magnetometry. The effect of the technological conditions on the phase structure and microstructure of the CoFe2O4 nano-powders was systematically studied. The obtained CoFe2O4 nano-powders were annealed, and then the effect of the hydroxide radical on their magnetic properties was explored. These results show that the magnetic property is im- proved by heat treatment due to the decrease of the hydroxide radical.

关 键 词：铁酸钴粉体 水热合成 羟基 磁学性能 

分 类 号：O482.54[一般工业技术—材料科学与工程]