Abstract
Magnetic metal absorbers exhibit remarkable microwave absorption capacity.However,their practical application is severely limited due to their susceptibility to corrosion,particularly in marine environ-ments.To address this challenge,we propose a novel approach involving the modification and control of FeCo/rGO microwave absorbers using rare earth lanthanum(La).This strategy aims to achieve both high-performance microwave absorption and enhanced resistance to marine corrosion.In this study,we employ a La2O3 modifying control strategy to refine the FeCo magnetic particles and coat them with CoFe2O4 on the surface,leveraging the pinning effect of in situ generated La2O3.This process enhances the interface polarization of the absorbers,thereby improving their electromagnetic performance and ma-rine corrosion resistance.Consequently,the La2O3 modified FeCo@rGO composites exhibit broadband ab-sorption,covering a wide frequency range of 6.11 GHz at 1.55 mm.Notably,the electromagnetic proper-ties of the La2O3 modified FeCo@rGO absorbers remain stable even after prolonged exposure to a 3.5 wt％NaCI solution,simulating marine conditions,for at least 15 days.Furthermore,we perform first-principle calculations on FeCo and FeCo-O to validate the corrosion resistance of the La2O3 modified FeCo@rGO composites at the atomic level.This comprehensive investigation explores the control of rare earth lan-thanum modification on the size of magnetic metal particles,enabling efficient electromagnetic wave absorption and marine corrosion resistance.The results of this study provide a novel and facile strategy for the control of microwave absorbers,offering promising prospects for future research and development in this field.
基金项目
National Key R&D Program of China(2021YFB3502500)
National Natural Science Foundation of China(52172091)
National Natural Science Foundation of China(52172295)
Natural science Foundation of Jiangsu Province(BK20211199)
Scientific Research Fund of AnHui Provincial Education Department(KJ2021A0034)
Open Fund of Key Laboratory of Materials Preparation and Protection for Harsh Environment(Nanjing University of Aeronautics and ()
Ministry of Industry and Information Technology(56XCA22042)
NETL
NSTL
万方数据