Precipitation of ZnO in Al2O3-doped zinc borate glass ceramics |
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Authors: | Hirokazu Masai Takahiro Ueno Yoshihiro Takahashi Takumi Fujiwara |
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Affiliation: | Department of Applied Physics, Tohoku University 6-6-05, Aoba, Aramaki, Sendai 980-8579, Japan |
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Abstract: | Crystallization behavior of the oxide semiconductor ZnO in zinc borate glass was investigated. The precipitated crystalline phase of glass ceramics containing a small amount of Al2O3 was α-Zn3B2O6 whereas that of the glass ceramics containing a large amount of Al2O3 was ZnO. It was found that the c-oriented precipitation of ZnO in a glass ceramic was brought about by the in-plane crystal growth of needle-like ZnO crystallites along the a-axis. Amount of Al2O3 that can make glass network affected the coordination state of B2O3 in the glass, and a three-coordinated BO3 unit was preferentially formed in the glass containing a higher amount of Al2O3. The present results suggest that crystallization of ZnO from multi-component glass is dominated by the local coordination state of the mother glass. |
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Keywords: | Glass ceramic Zinc oxide Crystallization |
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