磁性纳米ZnxCo1-xFe2O4空心微球的制备*

doi:10.11901/1005.3093.2014.174

材料研究学报

2014, Vol. 28

Issue (10): 763-768 DOI: 10.11901/1005.3093.2014.174

本期目录 | 过刊浏览

磁性纳米Zn_xCo_1-_xFe₂O₄空心微球的制备*

段红珍(

),赵丽平,陈国红

中北大学理学院化学系太原 030051

Preparation of Hollow Microspheres of Zn_xCo_1-_xFe₂O₄ Magnet

Hongzhen DUAN(

),Liping CHEN Guohong ZHAO

Department of Chemistry, School of Science, North University of China, Taiyuan 030051

引用本文:

段红珍,赵丽平,陈国红. 磁性纳米Zn_xCo_1-_xFe₂O₄空心微球的制备*[J]. 材料研究学报, 2014, 28(10): 763-768.
Hongzhen DUAN, Liping CHEN Guohong ZHAO, . Preparation of Hollow Microspheres of Zn_xCo_1-_xFe₂O₄ Magnet[J]. Chinese Journal of Materials Research, 2014, 28(10): 763-768.

全文: PDF(1540 KB) HTML

摘要:

用超声溶剂热法制备了磁性纳米Zn_xCo_1-_xFe₂O₄空心微球, 采用X射线衍射仪(XRD)和透射电子显微镜(TEM)对其结构和形貌进行了表征。结果表明, 所制备的Zn_xCo_1-_xFe₂O₄空心微球均为标准的立方结构, 说明锌的掺杂并不影响产物的晶型, 但对产物的粒径影响较大。所制备的CoFe₂O₄空心微球的平均粒径为50 nm左右, 但Zn_0.5Co_0.5Fe₂O₄空心微球的平均粒径为200 nm左右; 用振动样品磁强计(VSM)以及网络矢量分析仪测试了微球的磁性能和吸波性能, 结果显示, 微球的饱和磁化强度随锌含量的增加先略微增大后减小, 而矫顽力随锌含量的增加单调递减。当x=0.3时微球的磁性和吸波性能都为最佳。

关键词 ：无机非金属材料, Zn_xCo_1-_xFe₂O₄空心微球, 超声溶剂热法, 磁性, 吸波性

Abstract：

Hollow microspheres of Zn_xCo_1-xFe₂O₄ were synthesized by ultrasonic assisted solvothermal method. The microstructure and morphology of synthesized microspheres were characterized by X-ray diffraction (XRD) and transmission electron microscope (TEM). The results show that hollow microspheres of Zn_xCo_1-xFe₂O₄show cubic crystallographic structure which indicated that the doping of Zn²⁺had no effect on the crystal type, but it induced change in the size of the microspheres. The average diameter forhollow microspheres of CoFe₂O₄ and Zn_0.5Co_0.5Fe₂O₄were 50 nm and 200 nm respectively. The performance of magnetism and microwave absorbing of the microspheres were investigated by a vibrating magnetometer(VSM) and a network vector analyzer respectively. Results show that with the increasing of Zn²⁺ content, the saturation magnetization of the Zn_xCo_1-_xFe₂O₄ hollow microspheres increased slightly and then decreased, while the coercive force decreased. When x=0.3 the Zn_xCo_1-_xFe₂O₄ hollow microspheres exhibit the best performance both in magnetism and microwave absorbing.

Key words： inorganic non-metallic materials Zn_xCo_1-_xFe₂O₄ hollow microspheres ultrasonic solvothermal method magnetic properties microwave absorbing properties

收稿日期: 2014-04-08

基金资助:* 国家自然科学基金51272239资助项目。

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https://www.cjmr.org/CN/10.11901/1005.3093.2014.174 或 https://www.cjmr.org/CN/Y2014/V28/I10/763

图1 CoFe2O4及Zn0.5Co0.5Fe2O4空心微球的XRD图

图2 CoFe2O4及Zn0.5Co0.5Fe2O4空心微球的TEM像

图3 ZnxCo1-xFe2O4空心微球的磁滞回线

表1 ZnxCo1-xFe2O4空心微球的磁性能

图4 ZnxCo1-xFe2O4空心微球的吸波图

表2 ZnxCo1-xFe2O4空心微球的吸波性能

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