Impedance matching strategy boost excellent wave absorption performance of zinc-Aluminosilicate cladded short carbon fiber core-sheath structure

Abstract

Excellent impedance matching and practical material design are the keys to obtaining excellent microwave absorption performance and application. In this paper, a zinc aluminosilicate (ZAS) glass-ceramic precursor was prepared by a sol-gel method, short carbon fiber (SCF) was used as the main wave absorber, and a silane coupling agent (KH-550) was used to combine the ZAS and SCF. The oxidation concentration of short carbon fibers affects the load of KH-550, which changes the concentration of oxygen-containing groups on the SCF, affecting the thickness of the ZAS coated on the SCF to adjust the impedance matching of the material. In short, through simple experimental methods and adjustment methods, we can obtain the target's absorption performance and corresponding bandwidth. Our work provides a new idea for obtaining impedance matching adjustment of high-performance carbon fiber, and glass-ceramic composite electromagnetic (EM) wave absorbing materials.