Abstract
There are few reports on the application of Magnéli 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/Magnéli Ti4O7 composites to tune electromagnetic parameters and strengthen electromagnetic absorption.
Original language | English |
---|---|
Pages (from-to) | 33373-33381 |
Number of pages | 9 |
Journal | Ceramics International |
Volume | 47 |
Issue number | 23 |
DOIs | |
State | Published - 1 Dec 2021 |
Keywords
- Core-shell structure
- Magnetic coupling
- Microwave absorption
- Oxygen vacancies
- TiO/magnetic metal