微波食品加热
反射损耗
材料科学
介电损耗
吸收(声学)
宽带
电介质
三元运算
退火(玻璃)
纳米颗粒
石墨烯
微球
光电子学
衰减
复合材料
纳米技术
光学
化学工程
复合数
电信
工程类
程序设计语言
物理
计算机科学
作者
Qiang Zeng,Ping Chen,Yu Qi,Hairong Chu,Xuhai Xiong,Dongwei Xu,Qi Wang
标识
DOI:10.1038/s41598-017-08293-3
摘要
Abstract In this study, we report a simple and efficient two-step method consisting of water-in-oil (W/O) emulsion technique and subsequent annealing process for synthesizing the hollow reduced graphene oxide microspheres embedded with Co nanoparticles (Air@rGO€Co). The microspheres showed good electromagnetic properties because of the coexistence of magnetic loss and dielectric loss to microwaves. The minimum reflection loss (RL min ) value of S 1.5 reaches −68.1 dB at 13.8 GHz with a thickness of 2.2 mm, and the absorption bandwidth (lower than −10 dB) is 7.1 GHz covering from 10.9 GHz to 18.0 GHz. More interestingly, we can easily controll the microwave absorbing properties of the microspheres by changing the ratio of the two components in the composites. The excellent electromagnetic match at the corresponding resonance peaks for dielectric and magnetic loss play an important role in improving microwave absorption property. Our study provides a good potential method for preparation of lightweight microwave absorbing materials.
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