Microwave absorption performance of M-type hexagonal ferrite and MXene composite in Ka and V bands (5G mmWave frequency bands)
Microwave absorption performance of M-type hexagonal ferrite and MXene composite in Ka and V bands (5G mmWave frequency bands)
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M型六方铁氧体与MXene复合材料在Ka和V频段（5G毫米波频段）的微波吸收性能
DOI：
10.1016/j.jmmm.2022.169523
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发表时间：
2022
影响因子：
2.7
通讯作者：
Yeo, Chang-Dong
中科院分区：
文献类型：
--
作者：
Won, Hoyun;Hong, Yang-Ki;Choi, Minyeong;Garcia, Hector;Shin, Dongmyung;Yoon, Young-Sik;Lee, Kwangjoo;Xin, Hao;Yeo, Chang-Dong
在过去的十年里，人们研究了具有高屏蔽效能的轻薄电磁干扰(EMI)屏蔽材料，以解决所有电子技术中EMI造成的不可靠性问题。在这里，我们报道了新型的Ti3C2TxMXene/掺杂六方铁氧体(六方铁氧体：BaCo0.3Ti0.3Fe11.4O19)复合材料的SE。对于毫米波(毫米波)应用，这种复合材料主要通过在30到50 GHz频率范围内的吸收来抑制电磁波。采用LiF-HCl刻蚀法制备了二维无机化合物Ti3C2TxMXene，并采用传统的固相反应法制备了掺杂六元铁氧体颗粒。然后，将MXene/聚乙烯吡咯烷酮(PVP)溶液与六角铁氧体颗粒混合，制备了MXene/掺杂六角铁氧体复合材料。用振动样品磁强计测试了材料的静态磁性能，用矢量网络分析仪测试了材料的动态磁介电性能和微波吸收性能。与尖晶石型铁氧体不同，六角晶系铁氧体的高磁晶各向异性使微波吸收峰向Ka、V等毫米波频段移动。1.5 mm厚的MXene/45 GHz掺杂六元铁氧体复合材料在38-45 GHz的频率范围内显示出7 GHz的宽有效带宽(反射损耗小于10 GHz)。这种优异的吸波性能主要归功于改善了阻抗匹配和提高了复合材料的介电损耗和磁损耗。实验结果表明，MXene/BaCo0.3Ti0.3Fe11.4O19六元铁氧体复合材料有望成为第五代(5G)网络等毫米波应用的一种有效的电磁波吸收材料，为太赫兹(6G网络)电磁干扰材料的发展开辟了新的机遇。
Lightweight and thin electromagnetic interference (EMI) shielding materials with high shielding effectiveness (SE) have been investigated over the last decade to address the unreliability issue in all electronic technologies caused by EMI. Herein, we report the SE of the novel Ti3C2TxMXene/doped-hexaferrite (hexagonal ferrite: BaCo0.3Ti0.3Fe11.4O19) composite. This composite suppresses electromagnetic (EM) waves dominantly via absorption over the frequency range from 30 to 50 GHz for millimeter-wave (mmWave) applications. Two-dimensional inorganic compound Ti3C2TxMXene was synthesized using the LiF-HCl etching process, and doped-hexaferrite particles were prepared using a conventional solid-state reaction. Then, the MXene/doped-hexaferrite composite was fabricated by mixing MXene/polyvinyl-pyrrolidone (PVP) containing solution with the hexaferrite particles. The composites were characterized by a vibrating sample magnetometer for static magnetic properties and a vector network analyzer for dynamic magnetic and dielectric properties and microwave absorbing performance.A high magnetocrystalline anisotropy of hexaferrite shifted the microwave absorption peak to mmWave bands such as Ka- and V-bands, unlike spinel ferrite. The 1.5 mm thick MXene/45 wt% doped-hexaferrite composite shows a broad effective bandwidth (reflection loss (RL) less than 10 dB) of 7 GHz in the frequency range from 38 to 45 GHz. This excellent absorbing performance is mainly attributed to improved impedance matching and enhanced dielectric and magnetic losses of the composite. It was found that the SE was dominated by absorption instead of reflection.The experimental results demonstrate that the MXene/BaCo0.3Ti0.3Fe11.4O19hexaferrite composite can be a promising and effective EM wave absorber material for millimeter-wave applications such as the fifth-generation (5G) network and opens up new opportunities for THz (6G network) EMI materials development.