Viscosity and refractive index of M2O-TeO2(M = Li, Na and K) melts

Hirofumi Tokunaga, Shinichiro Haruki, Sohei Sukenaga, Noritaka Saito, Kunihiko Nakashima

    研究成果: Contribution to journalArticle査読

    3 被引用数 (Scopus)

    抄録

    We measured the viscosity and the refractive index of the binary tellurite glasses and melts, (M2O-TeO2 M = Li, Na and K), and investigated the thermal and compositional dependences of the properties. It was found that the viscosity and the refractive index of the binary tellurite melts decreased with increasing temperature, M2O content, and the radius of added cation. It was attributed to the structural change of melt from TeO4 trigonal bipyramid to TeO4- trigonal bipyramid and TeO3 trigonal pyramid with increasing temperature and M2O content. In an attempt to determine the change of tellurite structural units (TeO4, TeO4- and TeO3) with temperature and M2O content, the fraction of structural units in the melts was calculated from the refractive index of melts on the basis of the relationship between the refractive index and the structural units of tellurite glasses. It was found that the fraction of TeO3 increased with increasing temperature and M2O content, which was corresponded to the thermal and compositional dependences of the viscosity and refractive index measurements.

    本文言語英語
    ページ(範囲)331-336
    ページ数6
    ジャーナルNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
    74
    5
    DOI
    出版ステータス出版済み - 5 2010

    All Science Journal Classification (ASJC) codes

    • 凝縮系物理学
    • 材料力学
    • 金属および合金
    • 材料化学

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