National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, 100190, Beijing, People's Republic of China.
School of Engineering and Technology, China University of Geosciences, 100083, Beijing, People's Republic of China.
Nat Commun. 2018 Mar 21;9(1):1175. doi: 10.1038/s41467-018-03467-7.
Transparent crystalline yttrium aluminum garnet (YAG; YAlO) is a dominant host material used in phosphors, scintillators, and solid state lasers. However, YAG single crystals and transparent ceramics face several technological limitations including complex, time-consuming, and costly synthetic approaches. Here we report facile elaboration of transparent YAG-based ceramics by pressureless nano-crystallization of YO-AlO bulk glasses. The resulting ceramics present a nanostructuration composed of YAG nanocrystals (77 wt%) separated by small AlO crystalline domains (23 wt%). The hardness of these YAG-AlO nanoceramics is 10% higher than that of YAG single crystals. When doped by Ce, the YAG-AlO ceramics show a 87.5% quantum efficiency. The combination of these mechanical and optical properties, coupled with their simple, economical, and innovative preparation method, could drive the development of technologically relevant materials with potential applications in wide optical fields such as scintillators, lenses, gem stones, and phosphor converters in high-power white-light LED and laser diode.
透明的钇铝石榴石（YAG；YAlO）是一种在荧光粉、闪烁体和固态激光器中使用的主要基质材料。然而，YAG 单晶和透明陶瓷面临着一些技术限制，包括复杂、耗时和昂贵的合成方法。在这里，我们报告了通过常压纳米晶化 YO-AlO 体块玻璃来简便地制备透明的基于 YAG 的陶瓷。所得陶瓷由 YAG 纳米晶体（77wt%）和小的 AlO 晶体畴（23wt%）组成的纳米结构。这些 YAG-AlO 纳米陶瓷的硬度比 YAG 单晶高出 10%。当掺杂 Ce 时，YAG-AlO 陶瓷的量子效率为 87.5%。这些机械和光学性能的结合，再加上其简单、经济和创新的制备方法，可能会推动具有潜在应用的技术相关材料的发展，这些材料可应用于广泛的光学领域，如闪烁体、透镜、宝石和高功率白光 LED 和激光二极管中的磷光体转换器。
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