Electromagnetic wave absorption performance of Ti2O3 and vacancy enhancement effective bandwidth. (20th June 2021)

• Record Type: Journal Article
• Authors: Fu, Xiankai; Yang, Bo; Chen, Wanqi; Li, Zongbin; Yan, Haile; Zhao, Xiang; Zuo, Liang
• Is Part Of: Journal of materials science & technology. Volume 76(2021)
• Page Start: 166
• Page End: 173
• Publication Date: 2021-06-20
• Subjects: Ti2O3 -- Microwave absorption -- Vacancy -- Electric dipoles -- First-principles; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2020.11.001
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract: The microwave absorption properties of Ti2 O3 were systematically investigated. Experimental results indicate that Ti2 O3 has microwave absorption performance with a minimum reflection loss value of −37.6 dB at 18.6 GHz and an effective absorption bandwidth (RL < −10 dB) of 2 GHz. Further, vacancy defects were introduced into Ti2 O3 by carbothermal reduction. Interestingly, the effective absorption bandwidth of Ti2 O3 with vacancy defects reach 3.2 GHz. First-principles calculations provide evidence that vacancy defects result in the changes of electric dipole state, leading to a wider effective absorption bandwidth. These results have significance in understanding the origin of electromagnetic phenomena and developing electromagnetic wave absorption materials.