Novel core–shell structured Fe@Al2O3 nanofibers prepared by atomic layer deposition as a high-performance microwave absorbent

Abstract

Novel 3D Fe-NFs@Al₂O₃ composite nanofibers are developed as an advanced microwave absorption material. A minimum reflection loss of −57.9 dB can be achieved at 13.6 GHz at 1.65 mm with 30 wt% filler loading and the widest effective absorption bandwidth is 4.56 GHz within 10.4–14.96 GHz at 1.7 mm.