Effect of RE 2O 3 (RE = Y, Gd, Nd and La) additions on liquidas temperatures and viscosities of MgrO-SiO 2 melts

Noritaka Saito, Daiji Nakata, Ayumu Umemoto, Kunihiko Nakashima

    研究成果: Contribution to journalArticle査読

    7 被引用数 (Scopus)

    抄録

    The effect of adding RE 2O 3 (RE = Y, Gd, Nd and La) on the liquidus temperature of 45.2MgO54.8SiO 2 (mol%) system has been measured by the hot-thermocouple method. Moreover, The effect of adding RE 2O 3 (RE = Y, Gd, Nd and La) on the viscosity of 45.2MgO-54.8SiO 2 (mol%) melt has been measured with a rotating crucible viscometer. In addition, structural characterization of the quench vitreous samples was investigated by using IR spectra. Liquidus temperature and viscosity decreased with increasing of RE 2O 3 content, depending on the ionic radius of adding rare-earth elements. A marked change was observed in the order of ionic radius from La to Y. These results indicate that RE 2O 3 behaves as a network modifier in RE 2O 3- (45.2MgO-54.8SiO 2) melts. It is very likely that the RE 2O 3 with the larger ionic radius will modify the silicate networks more strongly. The IR spectra indicated that the degree of polymerization of silicate anions in RE 2O 3-(45.2MgO-54.8SiO 2) melts decreased with increasing RE 2O 3 content.

    本文言語英語
    ページ(範囲)152-158
    ページ数7
    ジャーナルNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
    69
    1
    DOI
    出版ステータス出版済み - 1 1 2005

    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

    フィンガープリント

    「Effect of RE <sub>2</sub>O <sub>3</sub> (RE = Y, Gd, Nd and La) additions on liquidas temperatures and viscosities of MgrO-SiO <sub>2</sub> melts」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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