Exploring the underlying mechanisms behind the increased far infrared radiation properties of perovskite-type Ce/Mn co-doped ceramics
| Autor: | Yi Deng, Matthew S. Dargusch, Yuan Wang, Kewei Zhang, Lei Yang, Taosheng Dong, Weizhong Yang, Min Hong, Zhigang Chen, Xiuyuan Shi |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Infrared Mechanical Engineering Analytical chemistry Infrared spectroscopy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Radiation properties 0104 chemical sciences Ion Far infrared Mechanics of Materials visual_art Emissivity visual_art.visual_art_medium General Materials Science Ceramic 0210 nano-technology Perovskite (structure) |
| Zdroj: | Materials Research Bulletin. 109:233-239 |
| ISSN: | 0025-5408 |
| DOI: | 10.1016/j.materresbull.2018.09.042 |
| Popis: | In this study, we report a solid-state synthesis of a novel Ce/Mn co-doped LaAlO3 ceramic with high far infrared emissivity. After detailed analysis of the infrared absorption and emission of the Ce/Mn co-doped LaAlO3 ceramics, we find that the synergistic effect of Ce/Mn co-doping is the key factor to promoting the infrared emission properties of the co-doped perovskite-type ceramic in 8–14 μm range. Compared with the pristine LaAlO3, La0.7Ce0.3Mn0.4Al0.6O3 sample displays the highest emissivity as high as 0.915. From the structural analysis, it is found that the occupation of irregular polyhedrons (A-site) by Ce4+ ion induces the generation of Mn2+ in the octahedral center (B-site), leading to the unit cell volume expansion and obvious lattice deformation. These structural alterations consequently improve the vibration of Al O Mn and Mn O Mn for enhancement of infrared radiation performance. The perovskite-type ceramic, which exhibits a high far infrared emissivity, displays a promising future in energy-saving applications. |
| Databáze: | OpenAIRE |
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