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Perovskite-type multi-component aluminates exhibiting high reflectivity and excellent thermal stability.

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Title: Perovskite-type multi-component aluminates exhibiting high reflectivity and excellent thermal stability.
Authors: Lei, Zijian1,2 (AUTHOR), Zou, Yang2 (AUTHOR), Zhao, Lili1,2 (AUTHOR) zll@mail.sic.ac.cn, Wang, Nan2,3 (AUTHOR), Zhang, Liangmiao1 (AUTHOR) lmzhang@shu.edu.cn
Source: Ceramics International. May2026:Part B, Vol. 52 Issue 12, p20597-20605. 9p.
Subjects: Laser damage, Optical reflection, Oxide ceramics, Ceramic materials, Thermal stability
Abstract: The demanding performance requirements for materials in extreme light-thermal coupling environments are driving the need for ceramics that combine high reflectivity with exceptional thermal stability for laser protection. In this study, two novel multi-component aluminates with a perovskite structure (space group C 2/ c) were designed and synthesized: La 0.5 Gd 0.5 AlO 3 (LGAO) and (La 1/3 Y 1/3 Gd 1/3)AlO 3 (LYGAO). These materials exhibit high reflectivity across the visible and near-infrared spectra, notably achieving over 98.7% at 1050 nm. Compared to the conventional LaAlO 3 (LAO), both LGAO and LYGAO demonstrate superior reflectivity and thermal stability at elevated temperatures. Crucially, they also show a substantially superior laser protection performance. Under laser irradiation at 2500 W/cm2, LGAO and LYGAO withstood 22 s and 26 s before failure, respectively, significantly outperforming LAO, which failed after only 9 s. This study shows that LGAO and LYGAO materials have wide application potential in the field of laser protection materials. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:The demanding performance requirements for materials in extreme light-thermal coupling environments are driving the need for ceramics that combine high reflectivity with exceptional thermal stability for laser protection. In this study, two novel multi-component aluminates with a perovskite structure (space group C 2/ c) were designed and synthesized: La 0.5 Gd 0.5 AlO 3 (LGAO) and (La 1/3 Y 1/3 Gd 1/3)AlO 3 (LYGAO). These materials exhibit high reflectivity across the visible and near-infrared spectra, notably achieving over 98.7% at 1050 nm. Compared to the conventional LaAlO 3 (LAO), both LGAO and LYGAO demonstrate superior reflectivity and thermal stability at elevated temperatures. Crucially, they also show a substantially superior laser protection performance. Under laser irradiation at 2500 W/cm2, LGAO and LYGAO withstood 22 s and 26 s before failure, respectively, significantly outperforming LAO, which failed after only 9 s. This study shows that LGAO and LYGAO materials have wide application potential in the field of laser protection materials. [ABSTRACT FROM AUTHOR]
ISSN:02728842
DOI:10.1016/j.ceramint.2026.03.151