Prediction of microwave absorption properties of tetrapod-needle zinc oxide whisker radar absorbing material without prior knowledge
Prediction of microwave absorption properties of tetrapod-needle zinc oxide whisker radar absorbing material without prior knowledge
复制标题
无先验知识的四足针状氧化锌晶须雷达吸波材料微波吸收特性预测
DOI：
10.1063/1.4993191
复制
发表时间：
2017-07
影响因子：
3.2
通讯作者：
Xiaoli Xi
中科院分区：
文献类型：
--
作者：
Yuchen Zhao;Jie Wang;Jiangfan Liu;Zhongguo Song;Xiaoli Xi
含四针状氧化锌晶须（T-ZnOw）的吸波材料具有良好的吸波性能。然而，现有的理论模型，这是为了预测这样一个有趣的复合材料的微波吸收性能，仍然不能很好地工作，没有一些先验知识，如所测得的有效电磁参数的制备T-ZnOw复合材料。因此，我们在这里提出了一种新的预测方法来计算T-ZnOw RAM的反射率没有先验知识。在该方法中，这种材料的吸收能力分为三个主要方面：非结构化背景，导电网络，和纳米结构颗粒。然后，分别采用等效球形粒子和静态强涨落理论、复阻抗谱技术得到的等效电路模型以及四种不同微观电磁响应的组合三种不同方法来表征这三部分的衰减特性。将这三种吸收效应综合到现有的理论衰减模型中，可以得到可操作的计算方案。在8-14 GHz的范围内，T-ZnON/SiO2复合材料的理论和实验数据之间的合理协议表明，所提出的方案可以预测的T-ZnOw RAM的微波吸收性能。进一步对这三种机理的详细分析表明，一方面，本底对T-ZnOw复合材料的有效介电常数的真实的部分起主导作用，而网络和颗粒是其材料损耗的决定性因素;另一方面，零相阻抗，即，具有适当谐振特性的纯电阻可能是导电网络的衰减特性的合理物理描述，但是通过传统的电阻和电容网络难以实现这样的阻抗特性。因此，一个串联谐振电路与一个相对较低的品质因数被引入到近似的材料损失所造成的网络。最后，分析了这三种吸波机制的不同组合，进一步展示了它们在整体吸波性能中的作用。
The radar absorbing material (RAM) containing a tetrapod-needle zinc oxide whisker (T-ZnOw) has been proved to have good efficiency of microwave absorption. However, the available theoretical models, which are intended to predict the microwave absorbing properties of such an interesting composite, still cannot work well without some prior knowledge, like the measured effective electromagnetic parameters of the prepared T-ZnOw composite. Hence, we propose a novel predictive method here to calculate the reflectivity of T-ZnOw RAM without prior knowledge. In this method, the absorbing ability of this kind of material is divided into three main aspects: the unstructured background, the conductive network, and the nanostructured particle. Then, the attenuation properties of these three parts are represented, respectively, by three different approaches: the equivalent spherical particle and the static strong fluctuation theory, the equivalent circuit model obtained from the complex impedance spectra technology, and the combination of four different microscopic electromagnetic responses. The operational calculation scheme can be obtained by integrating these three absorption effects into the existing theoretical attenuation model. The reasonable agreement between the theoretical and experimental data of a T-ZnON/SiO2 composite in the range of 8–14 GHz shows that the proposed scheme can predict the microwave absorption properties of the T-ZnOw RAM. Furthermore, a detailed analysis of these three mechanisms indicates that, on the one hand, the background plays a dominant role in determining the real part of the effective permittivity of the T-ZnOw composite while the network and the particle are the decisive factors of its material loss; on the other hand, an zero-phase impedance, i.e., a pure resistance, with appropriate resonance characteristic might be a rational physical description of the attenuation property of the conductive network, but it is difficult to realize such an impedance property by the traditional resistance and capacitance network. As a result, a series resonant circuit with a relatively low quality factor is introduced to approximate the material loss caused by the network. Finally, the different combinations of these three absorbing mechanisms are analyzed to further display their roles in the overall absorbing performance.
登录
查看更多内容
影响因子：
3.7
作者：
Min Wang;G. Fei;X. Zhu;Bing Wu;M. Kong;Lide Zhang
通讯作者：
Min Wang;G. Fei;X. Zhu;Bing Wu;M. Kong;Lide Zhang
影响因子：
5.4
作者：
Hui Zhang;Shenzhong Li;Xiangyang Ma;Deren Yang
通讯作者：
Hui Zhang;Shenzhong Li;Xiangyang Ma;Deren Yang
影响因子：
15
作者：
Peng, ZA;Peng, XG
通讯作者：
Peng, XG
影响因子：
9.1
作者：
Lee, Sang-Eui;Jee, Sang Soo;Mizusaki, Soichiro
通讯作者：
Mizusaki, Soichiro
四针状ZnO晶须的微波吸收行为
DOI：
10.1016/j.mseb.2005.09.009
发表时间：
2006-01
期刊：
Materials Science and Engineering B-Solid State Materials for Advanced Technology
影响因子：
--
作者：
Chu, LS;Hu, SC;Zhou, ZW
通讯作者：
Zhou, ZW