J. Mater. Sci. Technol. ›› 2021, Vol. 76: 166-173.DOI: 10.1016/j.jmst.2020.11.001

• Research Article • Previous Articles     Next Articles

Electromagnetic wave absorption performance of Ti2O3 and vacancy enhancement effective bandwidth

Xiankai Fu, Bo Yang, Wanqi Chen, Zongbin Li, Haile Yan, Xiang Zhao, Liang Zuo*()   

  1. Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang, 110819, China
  • Received:2020-04-12 Revised:2020-06-06 Accepted:2020-09-04 Published:2021-06-20 Online:2020-11-06
  • Contact: Liang Zuo
  • About author:*E-mail address: lzuo@mail.neu.edu.cn (L. Zuo).


The microwave absorption properties of Ti2O3 were systematically investigated. Experimental results indicate that Ti2O3 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 Ti2O3 by carbothermal reduction. Interestingly, the effective absorption bandwidth of Ti2O3 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.

Key words: Ti2O3, Microwave absorption, Vacancy, Electric dipolesFirst-principles