Electromagnetic wave absorption performance of Ti2O3 and vacancy enhancement effective bandwidth

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. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

Automated summary

The microwave absorption properties of Ti2O3 were studied, revealing that Ti2O3 with vacancy defects has a wider effective absorption bandwidth possibly due to changes in the electric dipole state caused by the defects.