Journal
CERAMICS INTERNATIONAL
Volume 47, Issue 23, Pages 33373-33381Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.08.240
Keywords
Ti4O7; magnetic metal; Oxygen vacancies; Core-shell structure; Magnetic coupling; Microwave absorption
Categories
Funding
- Research Fund of the State Key Laboratory of Solidification Processing (NWPU), China [2020-TS-01]
- Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University [CX2021055]
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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.
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.
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