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Formation of alkoxy-derived yttrium aluminium oxides

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Abstract

Monoclinic Y4Al2O9 and hexagonal YAlO3 crystallize at low temperatures from amorphous materials prepared by the hydrolysis of yttrium and aluminium double alkoxides. Hexagonal YAlO3 transforms to the cubic phase with a garnet structure as an intermediate product at elevated temperatures. The formation process of YAlO3 is described. Solid solutions of hexagonal YAlO3 crystallize between 50 and 62.5 mol % Al2O3. Yttrium aluminium garnet Y3Al5O12(YAG) is formed by transformation of the solid solution.

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Authors and Affiliations

  1. Department of Applied Chemistry, Doshisha University, 602, Kyoto, Japan

    O. Yamaguchi, K. Takeoka & K. Hirota

  2. Department of Chemical Engineering, Faculty of Engineering, Doshisha University, 602, Kyoto, Japan

    H. Takano & A. Hayashida

Authors
  1. O. Yamaguchi
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  2. K. Takeoka
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  3. K. Hirota
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  4. H. Takano
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  5. A. Hayashida
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Yamaguchi, O., Takeoka, K., Hirota, K. et al. Formation of alkoxy-derived yttrium aluminium oxides. J Mater Sci 27, 1261–1264 (1992). https://doi.org/10.1007/BF01142034

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  • DOI: https://doi.org/10.1007/BF01142034

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