Pressureless glass crystallization of transparent yttrium aluminum garnet-based nanoceramics

Xiaoguang Ma, Xiaoyu Li, Jianqiang Li (), Cécile Genevois, Bingqian Ma, Auriane Etienne, Chunlei Wan, Emmanuel Véron, Zhijian Peng and Mathieu Allix ()
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Xiaoguang Ma: Chinese Academy of Sciences
Xiaoyu Li: Chinese Academy of Sciences
Jianqiang Li: Chinese Academy of Sciences
Cécile Genevois: Univ. Orléans
Bingqian Ma: Chinese Academy of Sciences
Auriane Etienne: Normandie Univ
Chunlei Wan: Tsinghua University
Emmanuel Véron: Univ. Orléans
Zhijian Peng: China University of Geosciences
Mathieu Allix: Univ. Orléans

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract Transparent crystalline yttrium aluminum garnet (YAG; Y3Al5O12) 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 Y2O3–Al2O3 bulk glasses. The resulting ceramics present a nanostructuration composed of YAG nanocrystals (77 wt%) separated by small Al2O3 crystalline domains (23 wt%). The hardness of these YAG-Al2O3 nanoceramics is 10% higher than that of YAG single crystals. When doped by Ce3+, the YAG-Al2O3 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.

Date: 2018
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DOI: 10.1038/s41467-018-03467-7

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