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.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
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
关键词
铁酸钴粉体
水热合成
羟基
磁学性能
cobalt ferrite crystals
hydrothermal method
hydroxide radical, magnetic properties
