Synthesis and microwave absorbing properties of quasione-dimensional mesoporous NiCo2O4 nanostructure
Synthesis and microwave absorbing properties of quasione-dimensional mesoporous NiCo2O4 nanostructure
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DOI：
10.1016/j.jallcom.2013.09.091
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发表时间：
2014-02
影响因子：
6.2
通讯作者：
J. Zhan;Yonglin Yao;Chuanfu Zhang;Changjun Li
中科院分区：
文献类型：
--
作者：
J. Zhan;Yonglin Yao;Chuanfu Zhang;Changjun Li
采用沉淀-热分解法合成了纳米尺度的NiCo 2 O 4纳米结构。NiCo_2O_4纤维的直径为0.2-0.5 μm，比径为20-50。获得了NiCo 2 O 4的表面积为54.47 m2 g-1、平均孔径为12.5 nm的中孔结构。石蜡/50 wt.%的相对复介电常数和磁导率在2-18 GHz频率范围内测量了NiCo 2 O 4复合材料的吸波性能，并对复合材料的吸波性能进行了评价。在14.86 GHz频率下，复合材料厚度为1.50 mm时，反射损耗（RL）为−35.76 dB，有效带宽（RL < −10 dB）为11.18 GHz，这与材料的厚度、阻抗匹配和形貌有关。
Quasione-dimensional NiCo2O4nanostructure was synthesized by a precipitation-thermal decomposition process. The diameters and special ratios of the NiCo2O4fibers are 0.2–0.5 μm and 20–50, respectively. The mesoporous structure with a surface area of 54.47 m2g−1and average pore-size of 12.5 nm for the NiCo2O4was obtained. The relative complex permittivity and permeability of paraffin/50 wt.% NiCo2O4composite were measured in the frequency range of 2–18 GHz, and the microwave absorbing property of the composite was evaluated. An excellent reflection loss (RL) of −35.76 dB at 14.86 GHz with a composite thickness of 1.50 mm and effective bandwidth (RL < −10 dB) of 11.18 GHz were obtained, which is related to the thickness, impedance matching and morphology of the absorber.