高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

纳米复合材料CoFe2O4/SiO2的制备和表征

李海波1,2, 陈敬艳1, 刘梅1, 冯明1, 华杰1   

    1. 吉林师范大学物理学院, 四平 136000;
    2. 吉林大学超硬材料国家重点实验室, 长春 130012
  • 收稿日期:2006-08-20 修回日期:1900-01-01 出版日期:2007-04-10 发布日期:2007-04-10
  • 通讯作者: 李海波

Preparation and Characterization of CoFe2O4/SiO2 Nano-composites

LI Hai-Bo1,2*, CHEN Jing-Yan1, LIU Mei1, FENG Ming1, HUA Jie1   

    1. College of Physics, Jilin Normal University, Siping 136000, China;
    2. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • Received:2006-08-20 Revised:1900-01-01 Online:2007-04-10 Published:2007-04-10
  • Contact: LI Hai-Bo

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摘要： 采用溶胶-凝胶法制备了(CoFe2O4)x/(SiO2)1-x纳米复合材料. 利用TG/DTA, XRD和Mssbauer效应研究了热处理过程中干凝胶的变化及样品的结构、晶粒尺寸和磁性. 结果表明, 随着SiO2含量的增加, 样品中CoFe2O4的晶粒尺寸和内磁场逐渐变小, 并从磁有序状态转变为超顺磁状态.

Abstract: CoFe2O4/SiO2 nano-composites were prepared by the sol-gel method. The changes of gels during the heat treatment and the structure, crystalline size, microstructure of CoFe2O4/SiO2 nano-composites were investigated by TG/DTA, XRD and Mössbauer Techniques. The results show that with the increase of the content of SiO2, the crystalline size of CoFe2O4 and internal magnetic fields decreased, while samples were transferred from magnetic order to superparamagneitc state.

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