Construction of 3D conductive network by flower-like V2O3 synergy with magnetic NiCo for superior electromagnetic wave absorption performance. (December 2022)

• Record Type: Journal Article
• Authors: Zhou, Jixi; Jia, Zirui; Zhang, Yan; Wu, Guanglei
• Is Part Of: Materials today physics. Volume 29(2022)
• Publication Date: 2022-12
• Subjects: V2O3 -- flower-like -- Magnetic particles -- resonance -- Matching thickness; Materials science -- Periodicals; Physics -- Periodicals; Electronic journals; 530.41
• DOI: 10.1016/j.mtphys.2022.100902
• Languages: English
• ISSNs: 2542-5293

Abstract

Abstract: Reasonable structural design and excellent composition are crucial for constructing excellent electromagnetic absorbers. In this research, NiCo@C/V2 O3 composites were prepared by solvothermal method and annealing treatment using three-dimensional flower-like vanadium oxide as the matrix. The three-dimensional flower-like V2 O3 and NiCo magnetic particles endow the composite with multiple scattering and reflection, conduction loss, resonance, and eddy current loss, thereby exhibiting excellent electromagnetic wave (EMW) absorption performance. The results show that when the matching thickness is 1.8 mm, the minimum reflection loss (RLmin ) can reach -57.40 dB. Meanwhile, the effective absorption band (EAB) can cover 5.36 GHz at 1.6mm, and exhibits extremely low matching thickness. In addition, our research can provide ideas for the design of vanadium oxy-compound absorbing materials. Graphical abstract: Image 1 Highlights: The flower-like structure of V2 O3 increase the reflection and scattering of electromagnetic waves. The interface of NiCo@C and flower-like V2 O3 result in interfacial polarization. The presence of bimetals enhances the magnetic loss of the material. Dielectric loss and magnetic loss enable NiCo@C/V2 O3 to exhibit remarkable EMW performance at a thickness of 1.8 mm.