Enhanced microwave absorption of multiferroic Co2Z hexaferrite–BaTiO3 composites with tunable impedance matching
Enhanced microwave absorption of multiferroic Co2Z hexaferrite–BaTiO3 composites with tunable impedance matching
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DOI：
10.1016/j.jallcom.2015.04.122
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发表时间：
2015-09
影响因子：
6.2
通讯作者：
Xian Wang;Qifan Li;Z. Su;W. Gong;R. Gong;Yajie Chen;V. Harris
中科院分区：
文献类型：
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作者：
Xian Wang;Qifan Li;Z. Su;W. Gong;R. Gong;Yajie Chen;V. Harris
研究了由Co2 Z六角铁氧体和BaTiO 3（BT）组成的多铁性颗粒复合材料在2-18 GHz频率范围内的吸波性能。Co2 Z-BT复合材料的有效复磁导率和介电常数被证明是有效地操纵通过改变两相的重量比，从而表现出较强的可调谐性，在最佳工作频率和最小的反射损耗（RL）。对于最佳的Co2 Z-10 BT复合材料，与单相Co2 Z六角铁氧体相比，在2.0 mm厚度处的RL峰增强了97.8%。此外，低于10 GHz的阻抗匹配RL特性显示出随着BT含量的增加，厚度和带宽都有很大的改善。这项工作清楚地显示了潜在的调整阻抗匹配和微波吸收性能的多铁性复合材料。
The microwave absorbing properties of multiferroic particulate composites consisting of Co2Z hexaferrite and BaTiO3(BT) were investigated over a frequency range of 2–18 GHz. The effective complex permeability and permittivity of Co2Z–BT composites are shown to be effectively manipulated by varying the weight ratio of the two phases, which consequently demonstrates a strong tunability in the optimal working frequency and minimum reflection loss (RL). For the optimal Co2Z–10BT composite, the RL peak at a thickness of 2.0 mm was enhanced by 97.8% in comparison with that of the single phase Co2Z hexaferrite. Moreover, the impedance-matched RL characteristics below 10 GHz show a substantial improvement in both thickness and bandwidth with increasing BT content. This work clearly shows the potential to tune the impedance matching and microwave absorption performances of multiferroic composites.