Transparent Nano-Composites Ceramics by Annealing of Amorphous Phase in the HfO2-Al2O3-GdAlO3 System |
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| Authors: | Shunji Araki Masahiro Yoshimura |
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| Affiliation: | Center for Materials Design, Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama 226-8503, Japan |
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| Abstract: | We have succeeded in fabricating transparent nano-structured ceramics by annealing of the amorphous phase obtained by the solidification of the eutectic melt in the ternary system HfO2− Al2O3− GdAlO3. The ceramics annealed at 1273 K for 6 hr contained 5-10-nm cubic hafnia grains, and those annealed at 1273 K for 72 hr contained both cubic hafnia and gadolinium aluminum garnet grains 5-10 nm in size. They showed high transparency. Annealing at 1473 K, however, resulted in grain growths that brought about non-transparency. |
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