Tunable magnetic coupling and dipole polarization of core-shell Magn acute accent eli Ti4O7 ceramic/magnetic metal possessing broadband microwave absorption properties

There are few reports on the application of Magne ' li Ti4O7 in the field of electromagnetic wave absorption. Herein, we designed and prepared a Ti4O7/magnetic metal composite via an electrostatic assembly with in-situ reduction reaction. This system utilized distinct magnetic coupling deriving from the subtle designed structures and magnetic-dielectric synergy. The core-shell magnetic metallic nanoparticles/oxygen deficient Ti4O7 are useful microwave absorbers in terms of wide broadband, strong absorption and ultra-low filler amount. The optimal reflection loss of Ti4O7@CoNi composite was -43.6 dB at 2.5 mm, meanwhile the effective absorbing band could reach over 5.12 GHz at only a 2.7 mm thickness. The results confirm that the dependence of the electromagnetic characteristics of the absorber on the filler ratio, frequency, and absorber thickness. Therefore, this work may be beneficial in constructing core-shell structured magnetic metal/Magne ' li Ti4O7 composites to tune electromagnetic parameters and strengthen electromagnetic absorption.

Automated summary

In this study, a Ti4O7/magnetic metal composite was designed and prepared using electrostatic assembly and in-situ reduction reaction, showing useful microwave absorption properties with wide broadband, strong absorption, and low filler amount. The results highlight the importance of filler ratio, frequency, and absorber thickness in tuning the electromagnetic characteristics of the absorber.