首页|Dual strategy of A-site ion substitution and self-assembled MoS2 wrapping to boost permittivity for reinforced microwave absorption performance

Dual strategy of A-site ion substitution and self-assembled MoS2 wrapping to boost permittivity for reinforced microwave absorption performance

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With the rapid development of electronic technology,how to effectively eliminate electromagnetic pollu-tion has become a serious problem.Perovskite oxides have shown great potential in the field of electro-magnetic wave absorption due to their unique structure and excellent physicochemical properties.Herein,by rationally manipulating the A-site ion substitution strategy,the theoretically directed doping of Sr ions into La ionic sites was utilized and the layered MoS2 was loaded by the hydrothermal process to modify its surface.Consequently,the introduced polarization phenomenon improved the dielectric performance of the perovskite oxides,achieving a collaborative dielectric/magnetic loss mechanism.Accordingly,the prepared La0.7Sr0.3FeO3(LSFO)/MoS2 as coating filler in the epoxy resin coating system can obtain the minimum reflection loss of-67.09 dB at 1.9 mm and the maximum effective absorption bandwidth of 7.28 GHz at 2.3 mm.More importantly,it also exhibits excellent absorption performance for multi-band electromagnetic waves,covering a wide range of specified frequency bands.It provides inspiration for ex-ploring novel perovskite oxide-based electromagnetic wave absorbing coatings and broadens the choice of ideal candidate materials for designing highly efficient,multi-band absorbers to cope with sophisticated electromagnetic environments.

Perovskite oxidesA-site ion substitutionMulti-bandElectromagnetic wave absorbing coating

Ailing Feng、Di Lan、Jinkun Liu、Guanglei Wu、Zirui Jia

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Institute of Physics & Optoelectronics Technology,Baoji University of Arts and Sciences,Baoji 721016,China

School of Materials Science and Engineering,Hubei University of Automotive Technology,Shiyan 442002,China

Institute of Materials for Energy and Environment,State Key Laboratory of Bio-Fibers and Eco-Textiles,College of Materials Science and Engineering,Qingdao University,Qingdao 266071,China

College of Chemistry and Chemical Engineering,Qingdao University,Qingdao 266071,China

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国家自然科学基金山东省自然科学基金Taishan Scholars and Young Experts Program of Shandong ProvinceQingchuang Talents Induction Program of Shandong Higher Education Institution(Research and Innovation Team of Structural FunSpecial Financial of Shandong Province(Structural Design of Highefficiency Electromagnetic Waveabsorbing Composite Materials andAnalytical & Testing Center of Hubei University of Automotive Technology

52301192ZR2019YQ24tsqn202103057

2024

10.1016/j.jmst.2023.08.060

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.180(13)
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