@article{WANG2023, 
author = {Guangyang WANG and Shaobai SANG and Qinghu WANG and Qi WU and Yiran SUN},
title = {Infrared Emission Properties of Ni2+ Ions Doped MgCr2O4 Materials},
year = {2023},
journal = {Journal of the Chinese Ceramic Society},
volume = {51},
number = {3},
pages = {562-570},
keywords = {infrared radiation, emissivity, magnesium–chromium spinel, nicked doped},
url = {https://www.sciopen.com/article/10.14062/j.issn.0454-5648.20220874},
doi = {10.14062/j.issn.0454-5648.20220874},
abstract = {It is important to develop high emissivity infrared radiation materials for energy saving in high-temperature furnaces. In this work, Ni2+-doped MgCr2O4 materials were prepared by a high-temperature solid-phase reaction process. The effect of Ni2+ doping content on the infrared radiation properties of MgCr2O4 materials was investigated, and the mechanism of emissivity enhancement of MgCr2O4 materials was explored. The results show that Ni2+ ions can be doped into the lattice of MgCr2O4 materials, and the prepared Mg1–xNixCr2O4 (0.1≤x≤0.5) materials produce the lattice distortion and a small amount of Ni2+ valence state transformation. Also, the concentration of oxygen vacancies increases,the forbidden band width decreases with the increase of Ni2+ doping, thus improving the emissivity of the prepared materials in the near–mid-infrared band. The material with x of 0.5 (Mg0.5Ni0.5Cr2O4) has an average emissivity of 0.88 in the near infrared ref bands (i.e.,0.8–2.5 μm), which is 167% greater than that of the undoped specimens. Ni2+ ions doping enhances the lattice vibration absorption, free carrier absorption and impurity energy level absorption, and improves the infrared emissivity of MgCr2O4 materials in the near–mid-infrared band.}
}