当前位置: X-MOL 学术Compos. Sci. Technol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Multifunctional BiFeO 3 composites: Absorption attenuation dominated effective electromagnetic interference shielding and electromagnetic absorption induced by multiple dielectric and magnetic relaxations
Composites Science and Technology ( IF 9.1 ) Pub Date : 2018-05-01 , DOI: 10.1016/j.compscitech.2018.02.014
Yong Li , Ningning Sun , Jia Liu , Xihong Hao , Jinhua Du , Huijing Yang , Xiaowei Li , Maosheng Cao

Abstract BiFeO3 (BFO) grains prepared by molten salt method were fabricated in paraffin wax based composite structure to evaluate electromagnetic interference (EMI) shielding and electromagnetic (EM) absorption in 2–18 GHz. In the composites, BFO750 paraffin wax composite exhibits excellent EMI shielding and EM absorption performance. The EMI shielding effectiveness of BFO750 paraffin wax composite surpasses 10 dB, and its reflection loss shows three absorption peaks which reach −17 dB. The absorption efficiency and attenuation constant are close to 80% and 70, respectively. The results demonstrate that absorption attenuation is the dominant mechanism of EMI shielding and EM absorption. This is attributed to multiple dielectric and magnetic relaxations, where electric and magnetic dipoles coexisting in the composite can respond intensively to electromagnetic wave in the frequency range and thus cause high electromagnetic loss. The work highlights BFO composites as promising multifunctional materials in electromagnetic wave protection fields.

中文翻译:

多功能 BiFeO 3 复合材料:吸收衰减主导有效电磁干扰屏蔽和由多重介电和磁弛豫引起的电磁吸收

摘要 通过熔盐法制备的 BiFeO3 (BFO) 晶粒在石蜡基复合结构中制备,以评估 2-18 GHz 的电磁干扰 (EMI) 屏蔽和电磁 (EM) 吸收。在复合材料中,BFO750 石蜡复合材料表现出优异的 EMI 屏蔽和 EM 吸收性能。BFO750石蜡复合材料的EMI屏蔽效能超过10dB,其反射损耗显示出三个吸收峰,达到-17dB。吸收效率和衰减常数分别接近 80% 和 70。结果表明,吸收衰减是 EMI 屏蔽和 EM 吸收的主要机制。这归因于多重介电和磁弛豫,其中电偶极子和磁偶极子共存于复合材料中,可以对频率范围内的电磁波产生强烈响应,从而导致高电磁损耗。这项工作突出了 BFO 复合材料作为电磁波保护领域有前途的多功能材料。
更新日期:2018-05-01
down
wechat
bug