材料科学
反射损耗
微波食品加热
多孔性
复合材料
介孔材料
吸收(声学)
光电子学
纳米技术
复合数
生物化学
量子力学
物理
催化作用
化学
作者
Sai Gao,Guozheng Zhang,Yi Wang,Xiaopeng Han,Ying Huang,Panbo Liu
标识
DOI:10.1016/j.jmst.2021.02.011
摘要
Lightweight and high-performance are two determining factors for metal-organic-frameworks (MOFs) derived microwave absorbers. However, most of the reported MOFs derived absorbers usually possess high filler loading. Herein, a series of MOFs derived magnetic porous carbon microspheres with tunable diameter and high specific surface area have been synthesized via a pyrolysis process. The synthesized magnetic porous carbon microspheres, constructed by uniformly distributed core-shell [email protected], exhibit high-performance microwave absorption with a low filler loading of 10 wt%. Considering the mciro-mesoporous structures, matched impedance, strong conductive loss, enhanced dipolar/interfacial polarization as well as strong magnetic coupling network, a minimum reflection loss of -60 dB and an absorption bandwidth of 7.0 GHz can be achieved at 2.6 mm. Moreover, the bandwidth reaches as wide as 10.2 GHz when the thickness is 4 mm. In addition, compared with other MOFs derived absorbers, this work provides us a simple strategy for the synthesis of porous carbon microspheres with lightweight and high-performance microwave absorption for practical applications.
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