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Viscoelastic and Magnetically Aligned Flaky Fe-Based Magnetorheological Elastomer Film for Wide-Bandwidth Electromagnetic Wave Absorption
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-02-14 , DOI: 10.1021/acs.iecr.9b06143 Jiajia Zheng 1 , Xinsheng He 1 , Yancheng Li 2, 3 , Biao Zhao 4 , Fengchao Ye 1 , Chunfu Gao 1 , Mengjia Li 1 , Xiping Li 1 , Shiju E 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-02-14 , DOI: 10.1021/acs.iecr.9b06143 Jiajia Zheng 1 , Xinsheng He 1 , Yancheng Li 2, 3 , Biao Zhao 4 , Fengchao Ye 1 , Chunfu Gao 1 , Mengjia Li 1 , Xiping Li 1 , Shiju E 1
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A flaky Fe-based mangetorheological elastomer film (F-Fe/MREF) composite was developed through mixing micron-sized flaky Fe particles into a silicone rubber (SR) matrix by compression molding and vulcanization. The 28 wt % F-Fe/MREF with a thickness of 4.3 mm displays dual resonance peaks with an optimal reflection loss (RL) value of −53.3 dB at 4.8 GHz and an effective frequency bandwidth (RL < −10 dB) reaches 6.0 GHz. Furthermore, anisotropic F-Fe/MREF obtained by assistance of an external magnetic field demonstrates an effective bandwidth of 12.5 GHz in one thickness. This is attributed to the synergistic contributions from magnetic loss and dielectric loss and good impedance matching along with promotion of multiple reflections and scatterings. Besides, an MR effect of 39.2% was obtained for anisotropy F-Fe/MREF because of interaction enhancement between F-Fe particles and the cross-linked matrix. These results suggest that the F-Fe/MREF composites could serve as a potential candidate toward applications of electromagnetic wave absorbing.
中文翻译：
宽带电磁波吸收的粘弹性和磁取向片状铁基磁流变弹性体薄膜
通过压缩成型和硫化将微米级片状Fe颗粒混合到硅橡胶（SR）基质中，开发了片状Fe基人体流变弹性体膜（F-Fe / MREF）复合材料。28 wt％的F-Fe / MREF厚度为4.3 mm，显示出双共振峰，在4.8 GHz时最佳反射损耗（RL）值为-53.3 dB，有效带宽（RL <-10 dB）达到6.0 GHz 。此外，借助于外部磁场获得的各向异性F-Fe / MREF在一个厚度上显示出12.5 GHz的有效带宽。这归因于磁损耗和介电损耗以及良好的阻抗匹配以及促进多次反射和散射的协同作用。此外，他的MR效应为39。由于F-Fe颗粒与交联基体之间的相互作用增强，因此各向异性F-Fe / MREF达到2％。这些结果表明，F-Fe / MREF复合材料可以作为电磁波吸收应用的潜在候选者。
更新日期：2020-02-17
中文翻译：
宽带电磁波吸收的粘弹性和磁取向片状铁基磁流变弹性体薄膜
通过压缩成型和硫化将微米级片状Fe颗粒混合到硅橡胶（SR）基质中，开发了片状Fe基人体流变弹性体膜（F-Fe / MREF）复合材料。28 wt％的F-Fe / MREF厚度为4.3 mm，显示出双共振峰，在4.8 GHz时最佳反射损耗（RL）值为-53.3 dB，有效带宽（RL <-10 dB）达到6.0 GHz 。此外，借助于外部磁场获得的各向异性F-Fe / MREF在一个厚度上显示出12.5 GHz的有效带宽。这归因于磁损耗和介电损耗以及良好的阻抗匹配以及促进多次反射和散射的协同作用。此外，他的MR效应为39。由于F-Fe颗粒与交联基体之间的相互作用增强，因此各向异性F-Fe / MREF达到2％。这些结果表明，F-Fe / MREF复合材料可以作为电磁波吸收应用的潜在候选者。
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