燃料化学学报（中英文）2026，Vol.54Issue(1)：133-147,117-120,19.DOI:10.1016/S1872-5813(25)60593-7
Fe3O4/中间相煤沥青基活性复合炭泡沫制备及其电磁屏蔽和吸波性能调控
Preparation and tailoring electromagnetic shielding and microwave absorbing performance of Fe3O4 modified activated carbon foam based on mesophase coal pitch pyrolysis foaming
摘要
Abstract
The development of materials with excellent microwave absorption(MWA)and electromagnetic interference(EMI)shielding performances has currently received attention.Herein,mesophase pitch-based carbon foam(MPCF)with 3D interconnected pore structure was prepared through the high pressure pyrolysis of mesophase coal tar pitch.It is found that the 3D interconnected cellular pores of MPCF facilitate multiple reflections of electromagnetic waves,which results in the minimum reflection loss(RLmin)value of MPCF reaches-37.84 dB with the effective absorption bandwidth(EAB)of 5.44 GHz at a thickness of 2.70 mm,and the total average electromagnetic shielding effectiveness(SET)under 3.00 mm thickness achieves 26.52 dB in X-band.Subsequently,MPCF is activated by KOH to obtain activated carbon foam(A-MPCF).The average SET of A-MPCF achieves 103.00 dB for abundant nanopores on the pore cell walls,which leads to a transition from the multiple reflections of electromagnetic waves on the walls to diffuse reflection.Unfortunately,the reflection coefficient(R)of A-MPCF increases from 0.78 to 0.90.To reduce the R value,Fe3O4/A-MPCF was fabricated via the in situ growth of nano Fe3O4 on A-MPCF.Consequently,the R value of Fe3O4/A-MPCF was reduced from 0.90 to 0.74,whereas the MWA performance was only slightly decreased.This work proposes a simple strategy for simultaneously adjusting MWA and EMI shielding performances of materials.关键词
炭泡沫/微波吸收/电磁干扰屏蔽/中间相沥青Key words
carbon foam/microwave absorption/electromagnetic interference shielding/mesophase pitch分类
化学化工引用本文复制引用
葛媛媛,王禹哲,徐国忠,朱亚明,袁霞,史桂梅,钟祥云..Fe3O4/中间相煤沥青基活性复合炭泡沫制备及其电磁屏蔽和吸波性能调控[J].燃料化学学报（中英文）,2026,54(1):133-147,117-120,19.基金项目
Supported by the National Natural Science Foundation of China(22378181). （22378181）
