Abstract
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.
基金项目
国家自然科学基金(52301192)
山东省自然科学基金(ZR2019YQ24)
Taishan Scholars and Young Experts Program of Shandong Province(tsqn202103057)
Qingchuang Talents Induction Program of Shandong Higher Education Institution(Research and Innovation Team of Structural Fun()
Special Financial of Shandong Province(Structural Design of Highefficiency Electromagnetic Waveabsorbing Composite Materials and()
Analytical & Testing Center of Hubei University of Automotive Technology()
NETL
NSTL
万方数据