Formation and Crystallization in the Yttrium Aluminosilicate Glasses Containing Zinc Oxide |
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| Authors: | Akio Makishima Hajime Kubo Kazuo Kotani Masayuki Tsutsumi Mitsuaki Asami |
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| Affiliation: | National Institute for Research in Inorganic Materials, Namiki 1–1, Sakura-mura, Niihari-gun, Ibaraki 305, Japan |
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| Abstract: | Formation of yttrium aluminosilicate glasses containing zinc oxide from batches melted at 1550°C was investigated. Densities, thermal expansion coefficients, and Vickers hardnesses were measured for some glasses. In a specific compositional region, crystals with a convex and pyramidal habit were observed on the glass surface. The crystal was identified as ZnAl2O4 (gahnite) which has a Moh's hardness number of ∼8. |
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