Preparation and electromagnetic properties of graphene-supported Ni0.8Zn0.2Ce0.06Fe1.94O4 nanocomposite
Preparation and electromagnetic properties of graphene-supported Ni0.8Zn0.2Ce0.06Fe1.94O4 nanocomposite
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DOI：
10.1016/j.powtec.2013.08.024
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发表时间：
2013-11
影响因子：
5.2
通讯作者：
Y. Wang;Ying Huang;Qiufen Wang;M. Zong
中科院分区：
文献类型：
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作者：
Y. Wang;Ying Huang;Qiufen Wang;M. Zong
采用还原法制备了石墨烯负载Ni0.8Zn0.2Ce0.06Fe1.94O4纳米复合材料。用多种仪器对复合材料的结构、形态和电磁性能进行了表征。Ni0.8Zn0.2Ce0.06Fe1.94O4粉末可以均匀分布在石墨烯薄片上。制备的Ni0.8Zn0.2Ce0.06Fe1.94O4/GNS纳米复合材料的饱和磁化强度为50.42emu/g，在2-18 GHz范围内研究了Ni0.8Zn0.2Ce0.06Fe1.94O4/GNS纳米复合材料的电磁参数。Ni0.8Zn0.2Ce0.06Fe1.94O4/GNS复合材料的微波吸收性能优于Ni0.8Zn0.2Ce0.06Fe1.94O4。Ni0.8Zn0.2Ce0.06Fe1.94O4/GNS纳米复合材料的最小损耗在12.3 GHz处为−=37.4 GHz，在10.7~15.2 GHz处有一个带宽小于−的宽峰。这些结果表明，GNS的引入可以提高材料的复介电常数，对改善材料的微波吸收性能有重要作用。
The graphene supported Ni0.8Zn0.2Ce0.06Fe1.94O4nanocomposite was prepared by a deoxidation technique. The structure, morphology and electromagnetic properties of the composites were characterized by various instruments. The Ni0.8Zn0.2Ce0.06Fe1.94O4powders could be distributed on the graphene sheets (GNS). The as-prepared Ni0.8Zn0.2Ce0.06Fe1.94O4/GNS nanocomposite exhibits a saturated magnetization of 50.42 emu/g. The electromagnetic parameters of Ni0.8Zn0.2Ce0.06Fe1.94O4/GNS nanocomposite were investigated in the 2–18 GHz range. The composite Ni0.8Zn0.2Ce0.06Fe1.94O4/GNS exhibits better microwave absorbing properties than Ni0.8Zn0.2Ce0.06Fe1.94O4. The minimum loss value of Ni0.8Zn0.2Ce0.06Fe1.94O4/GNS nanocomposite is − 37.4 dB at 12.3 GHz and a broad peak with a bandwidth lower than − 10 dB is at 10.7–15.2 GHz. These results show that the introduction of GNS can increase the complex permittivities and has an important effect on the improvement of microwave absorption properties.