两步法中煅烧温度对Ni0.5Zn0.5Fe2O4电磁性能的影响

doi:10.11868/j.issn.1001-4381.2017.000340

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摘要采用两步法（共沉淀法联合溶胶-凝胶法）制备Ni_0.5Zn_0.5Fe₂O₄纳米吸波材料，探究了溶胶-凝胶法中前驱体的煅烧温度对样品微波吸收性能的影响。利用X射线衍射（XRD）、原子力显微镜（AFM）以及矢量网络分析（VNA）等方法对样品的微观结构和电磁性能进行表征。XRD分析结果表明：当煅烧温度大于650℃时，能够得到纯Ni_0.5Zn_0.5Fe₂O₄纳米粉体；AFM结果表明：随着煅烧温度的提高，样品颗粒粒径趋于细小化和均匀化；VNA结果表明：在2~12.4GHz范围内，煅烧温度为650℃时，制备的Ni_0.5Zn_0.5Fe₂O₄表现出最佳的电磁特性，具有优异的微波吸收性能。样品的有效吸波频宽为4.9GHz，最大吸波强度达到-24.94dB。

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	李浩
	毕松
	侯根良
	苏勋家
	李军
	汤进
	林阳阳

关键词 ： Ni_0.5Zn_0.5Fe₂O₄, 纳米吸波材料, 煅烧温度, 电磁特性, 微波吸收

Abstract：The Ni_0.5Zn_0.5Fe₂O₄ nano absorbing materials were prepared by two-step method(coprecipitation method combined with sol-gel method), and the microwave absorption influence of the calcination temperature of the precursor in sol-gel method were explored. Moreover, the microstructure and electromagnetic properties of the as-prepared samples were characterized by the X-ray diffraction (XRD), atomic force microscope (AFM), vector network analysis (VNA). Consequently, XRD analysis indicates that the pure Ni_0.5Zn_0.5Fe₂O₄ nanoparticles can be obtained while the temperature is higher than 650℃. The AFM results show that the microstructure size of the samples tends to be smaller and more uniform while the temperature is increased. Besides, the VNA results indicate the Ni_0.5Zn_0.5Fe₂O₄ exhibits best electromagnetic properties within 2-12.4GHz at the calcination the temperature is 650℃, and the as-prepared samples possess excellent microwave absorption performance. The qualified absorption bandwidth reaches 4.9GHz, and the maximum reflection loss reaches -24.94dB.

Key words： Ni_0.5Zn_0.5Fe₂O₄ microwave absorbing nano-material calcination temperature electromagnetic property microwave absorption

收稿日期: 2017-03-23 出版日期: 2019-01-16

中图分类号:

TQ174

通讯作者: 苏勋家(1965-),男,教授,博士生导师,主要从事军用新材料的研究与制备等方面的研究工作,联系地址:陕西省西安市灞桥区洪庆街道同心路2号(710025),E-mail:suxunjia@163.com E-mail: suxunjia@163.com

引用本文:

李浩, 毕松, 侯根良, 苏勋家, 李军, 汤进, 林阳阳. 两步法中煅烧温度对Ni_0.5Zn_0.5Fe₂O₄电磁性能的影响[J]. 材料工程, 2019, 47(1): 64-69.
LI Hao, BI Song, HOU Gen-liang, SU Xun-jia, LI Jun, TANG Jin, LIN Yang-yang. Effect of calcination temperature on electromagnetic property of Ni_0.5Zn_0.5Fe₂O₄ prepared by two-step method. Journal of Materials Engineering, 2019, 47(1): 64-69.

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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2017.000340 或 http://jme.biam.ac.cn/CN/Y2019/V47/I1/64

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