TY - JOUR
T1 - Infrared emissivity behavior of doped CeO2 at high temperature
AU - Guo, Jincheng
AU - Yin, Jun Lei
AU - Gao, Dongxin
AU - Ren, Ke
AU - Wang, William Yi
AU - Wang, Yiguang
N1 - Publisher Copyright:
© 2024 Elsevier Ltd and Techna Group S.r.l.
PY - 2024/11/1
Y1 - 2024/11/1
N2 - In this study, cerium dioxide (CeO2) materials doped with one (Gd3+, GDC), two (Gd3+ and Na+, GNDC), and three (Gd3+, Na+, and Eu3+, EGNDC) components were, respectively, prepared, and their high-temperature infrared emissivity was investigated through experimental measurements and theoretical calculations. The experimental results show that GDC exhibits the highest oxygen vacancy concentration, highest conductivity, and narrowest band gap; furthermore, it exhibits an ultralow infrared emissivity (0.202 at 600 °C). The band structure calculations reveal that the Fermi level of GDC shows the highest total density of states, and electrons are more likely to enter the conduction band, which increases the conductivity and thus reduces the infrared emissivity. Furthermore, the infrared reflectance decreases gradually with increasing number of doping components, and the highest infrared reflectance and lowest infrared emissivity for GDC are obtained at 3–5 μm. These findings are consistent with the experimental results.
AB - In this study, cerium dioxide (CeO2) materials doped with one (Gd3+, GDC), two (Gd3+ and Na+, GNDC), and three (Gd3+, Na+, and Eu3+, EGNDC) components were, respectively, prepared, and their high-temperature infrared emissivity was investigated through experimental measurements and theoretical calculations. The experimental results show that GDC exhibits the highest oxygen vacancy concentration, highest conductivity, and narrowest band gap; furthermore, it exhibits an ultralow infrared emissivity (0.202 at 600 °C). The band structure calculations reveal that the Fermi level of GDC shows the highest total density of states, and electrons are more likely to enter the conduction band, which increases the conductivity and thus reduces the infrared emissivity. Furthermore, the infrared reflectance decreases gradually with increasing number of doping components, and the highest infrared reflectance and lowest infrared emissivity for GDC are obtained at 3–5 μm. These findings are consistent with the experimental results.
KW - Band structure
KW - Doped CeO
KW - High-temperature
KW - Infrared emissivity
UR - http://www.scopus.com/inward/record.url?scp=85200904418&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2024.08.137
DO - 10.1016/j.ceramint.2024.08.137
M3 - 文章
AN - SCOPUS:85200904418
SN - 0272-8842
VL - 50
SP - 42913
EP - 42921
JO - Ceramics International
JF - Ceramics International
IS - 21
ER -