Exploring the underlying mechanisms behind the increased far infrared radiation properties of perovskite-type Ce/Mn co-doped ceramics. (January 2019)

• Record Type: Journal Article
• Authors: Deng, Yi; Zhang, Kewei; Shi, Xiuyuan; Dong, Taosheng; Yang, Lei; Yang, Weizhong; Hong, Min; Wang, Yuan; Dargusch, Matthew; Chen, Zhi-Gang
• Is Part Of: Materials research bulletin. Volume 109(2019)
• Page Start: 233
• Page End: 239
• Publication Date: 2019-01
• Subjects: Far infrared emission -- LaAlO3 -- Co-doping -- Perovskite -- Ceramic; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2018.09.042
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Ce/Mn dual-doped LaAlO3 ceramics are prepared via solid-state synthesis approach. Ce/Mn co-doping causes the enhancement of lattice strain and asymmetrical vibration. Ce/Mn co-doped ceramics possess appealingly high far-infrared emissivity. Abstract: 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, La0.7 Ce0.3 Mn0.4 Al0.6 O3 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 Ce 4+ ion induces the generation of Mn 2+ 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 AlOMn and MnOMn 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.