Glass Formation in LaO3/2TiO2 Binary System by Containerless Processing

Authors

  • Masashi Kaneko,

    Corresponding author
    1. ISS Science Project Office, Japan Aerospace Exploration Agency, Chuo-ku, Sagamihara, Kanagawa, Japan
    • Department of Innovative and Engineered Materials, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Midori-ku, Yokohama, Japan
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  • Jianding Yu,

    1. ISS Science Project Office, Japan Aerospace Exploration Agency, Chuo-ku, Sagamihara, Kanagawa, Japan
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  • Atsunobu Masuno,

    1. Institute of Industrial Science, The University of Tokyo, Meguro-ku, Tokyo, Japan
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  • Hiroyuki Inoue,

    1. Institute of Industrial Science, The University of Tokyo, Meguro-ku, Tokyo, Japan
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  • M. S. Vijaya Kumar,

    1. ISS Science Project Office, Japan Aerospace Exploration Agency, Chuo-ku, Sagamihara, Kanagawa, Japan
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  • Osamu Odawara,

    1. Department of Innovative and Engineered Materials, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Midori-ku, Yokohama, Japan
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  • Shinichi Yoda

    1. Department of Innovative and Engineered Materials, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Midori-ku, Yokohama, Japan
    2. ISS Science Project Office, Japan Aerospace Exploration Agency, Chuo-ku, Sagamihara, Kanagawa, Japan
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Author to whom correspondence should be addressed. e-mail: kaneko.masashi@jaxa.jp

Abstract

Using containerless processing with an aerodynamic levitation furnace, LaO3/2TiO2 binary glasses were synthesized in bulk form. Glass-forming region was found in the vicinity of eutectic point, which is approximately 29.5% LaO3/2 and 70.5% TiO2 in molar ratio. The glass transition temperature Tg and the crystallization onset temperature Tx of the obtained glasses were determined by differential scanning calorimetry. The thermal stability was evaluated by ΔT (=Tx − Tg). Our experimental results were compared with phase diagram of the LaO3/2TiO2 binary system. Glass compositions with highest ΔT corresponded to single-phase compound of La4Ti9O24 and the eutectic point.

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