Microwave absorption properties and mechanism of cagelike ZnO/SiO2 nanocomposites
Microwave absorption properties and mechanism of cagelike ZnO/SiO2 nanocomposites
复制标题
笼状ZnO/SiO2纳米复合材料的微波吸收性能及机理
DOI：
10.1063/1.2803764
复制
发表时间：
2007-11-12
影响因子：
4
通讯作者：
Chen, Yu-Jin
中科院分区：
文献类型：
--
作者：
Cao, Mao-Sheng;Shi, Xiao-Ling;Chen, Yu-Jin
本文制备了笼状ZnO/SiO2纳米复合材料，并对其微波吸收性能进行了研究。在8.2-12.4 GHz的频率范围内测量了纯笼状ZnO纳米结构的介电常数和损耗。测试结果表明笼状ZnO纳米结构是X波段低损耗微波吸收材料。笼状ZnO/SiO2纳米复合材料对X波段微波有较强的衰减作用。这种强吸收与复合材料中笼状ZnO纳米结构的独特几何形态有关。在笼状ZnO纳米结构中可以产生微电流网络，这是导致导电损耗的原因。(c)2007年，美国物理学会。
In this paper, cagelike ZnO/SiO2 nanocomposites were prepared and their microwave absorption properties were investigated in detail. Dielectric constants and losses of the pure cagelike ZnO nanostructures were measured in a frequency range of 8.2-12.4 GHz. The measured results indicate that the cagelike ZnO nanostructures are low-loss material for microwave absorption in X band. However, the cagelike ZnO/SiO2 nanocomposites exhibit a relatively strong attenuation to microwave in X band. Such strong absorption is related to the unique geometrical morphology of the cagelike ZnO nanostructures in the composites. The microcurrent network can be produced in the cagelike ZnO nanostructures, which contributes to the conductive loss. (c) 2007 American Institute of Physics.