High-entropy rare earth stannate ceramics: Acid corrosion resistant radiative cooling materials with high atmospheric transparency window emissivity and high near-infrared solar reflectivity
| Title: | High-entropy rare earth stannate ceramics: Acid corrosion resistant radiative cooling materials with high atmospheric transparency window emissivity and high near-infrared solar reflectivity |
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| Authors: | Tao Chen, Yanyan He, Yanyu Pan, Kaixian Wang, Minzhong Huang, Liyan Xue, Yazhu Li, Fan Yang, Yanchun Zhou, Heng Chen |
| Source: | Journal of Advanced Ceramics, Vol 13, Iss 5, Pp 630-640 (2024) |
| Publisher Information: | Tsinghua University Press, 2024. |
| Publication Year: | 2024 |
| Collection: | LCC:Clay industries. Ceramics. Glass |
| Subject Terms: | radiative cooling materials, high-entropy ceramics (hecs), rare earth stannate (re2sn2o7), high atmospheric transparency window emissivity, high near-infrared (nir) solar reflectivity, Clay industries. Ceramics. Glass, TP785-869 |
| More Details: | In response to the development of the concepts of “carbon neutrality” and “carbon peak”, it is critical to developing materials with high near-infrared (NIR) solar reflectivity and high emissivity in the atmospheric transparency window (ATW; 8–13 μm) to advance zero energy consumption radiative cooling technology. To regulate emission and reflection properties, a series of high-entropy rare earth stannate ceramics (HE-RE2Sn2O7: (Y0.2La0.2Nd0.2Eu0.2Gd0.2)2Sn2O7, (Y0.2La0.2Sm0.2Eu0.2Lu0.2)2Sn2O7, and (Y0.2La0.2Gd0.2Yb0.2Lu0.2)2Sn2O7) with severe lattice distortion were prepared using a solid phase reaction followed by a pressureless sintering method for the first time. Lattice distortion is accomplished by introducing rare earth elements with different cation radii and mass. The as-synthesized HE-RE2Sn2O7 ceramics possess high ATW emissivity (91.38%–95.41%), high NIR solar reflectivity (92.74%–97.62%), low thermal conductivity (1.080–1.619 W·m−1·K−1), and excellent chemical stability. On the one hand, the lattice distortion intensifies the asymmetry of the structural unit to cause a notable alteration in the electric dipole moment, ultimately enlarging the ATW emissivity. On the other hand, by selecting difficult excitation elements, HE-RE2Sn2O7, which has a wide band gap (Eg), exhibits high NIR solar reflectivity. Hence, the multi-component design can effectively enhance radiative cooling ability of HE-RE2Sn2O7 and provide a novel strategy for developing radiative cooling materials. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 2226-4108 2227-8508 |
| Relation: | https://www.sciopen.com/article/10.26599/JAC.2024.9220884; https://doaj.org/toc/2226-4108; https://doaj.org/toc/2227-8508 |
| DOI: | 10.26599/JAC.2024.9220884 |
| Access URL: | https://doaj.org/article/8bdc8689880443f1908b7393b1b26c07 |
| Accession Number: | edsdoj.8bdc8689880443f1908b7393b1b26c07 |
| Database: | Directory of Open Access Journals |
| ISSN: | 22264108 22278508 |
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| DOI: | 10.26599/JAC.2024.9220884 |
| Published in: | Journal of Advanced Ceramics |
| Language: | English |