The effect of Al3+ doping on the infrared radiation and thermophysical properties of SrZrO3 perovskites as potential low thermal infrared material. (1st May 2021)

• Record Type: Journal Article
• Authors: Li, Enbo; Ma, Wen; Zhang, Peng; Zhang, Chennan; Bai, Yu; Liu, Hongxia; Yan, Shufang; Dong, Hongying; Meng, Xiangfeng
• Is Part Of: Acta materialia. Volume 209(2021)
• Publication Date: 2021-05-01
• Subjects: Al3+-doped SrZrO3 -- Low infrared radiation -- Al3+-doping effect -- Electronic structure -- High temperature service; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Mechanical properties -- Periodicals; Metallurgy -- Periodicals; Chemistry, Inorganic -- Periodicals; 620.112
• DOI: 10.1016/j.actamat.2021.116795
• Languages: English
• ISSNs: 1359-6454

Abstract

Abstract: A series of Al 3+ -doped SrZrO3 perovskite powders with low infrared emissivity were prepared. The doping-effect of Al 3+ on infrared radiation ability and thermophysical properties was investigated in detail by theoretical and experimental methods. As a result, Al 3+ -doped SrZrO3 perovskite's infrared emissivity is related to its electronic structure and particle morphology. It can be adjusted by the Al 3+ -doped concentration. The SrZr0.86 Al0.14 O2.935 powder with stronger electronic conductivity and flake particles has the lowest infrared emissivity with 0.256 in 3-5 μm waveband at 590 °C and 0.383 in 8-14 μm waveband at 550 °C. Al 3+ -doped SrZrO3 perovskites still maintain ideal thermal stability and low thermal conductivity above 800 °C. Base on both low infrared emissivity and thermal conductivity, Al 3+ -doped SrZrO3 tablets exhibited weaker thermal radiation intensity in the high-temperature condition and might be the potential low thermal infrared materials servicing under extreme temperature in the future. Graphical abstract: A series of Al 3+ -doped SrZrO3 perovskite powders with low infrared emissivity in high-temperature conditions were prepared. The perovskite powder's infrared emissivity is related to its electronic structure and particle morphology. It can be adjusted by Al 3+ concentration. The SrZr0.86 Al0.14 O2.935 powder with stronger electronic conductivity and flake particles shows lowest infrared emissivity in 3-5 and 8-14 μm wavebands. This material exhibits significant weak thermal infrared intensity under high temperature due to its both low in infrared emissivity and thermal conductivity, and could be used long-term over 800°C. Image, graphical abstract