JAXA Repository / AIREX 未来へ続く、宙(そら)への英知

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Other TitleFormation of metastable rare-earth iron garnet by rapid quenching
Author(jpn)山口 沖枝; 長汐 晃輔; 日比谷 孟俊; 栗林 一彦
Author(eng)Yamaguchi, Okie; Nagashio, Kosuke; Hibiya, Taketoshi; Kuribayashi, Kazuhiko
Author Affiliation(jpn)東京都立科学技術大学; 宇宙航空研究開発機構 宇宙科学研究本部; 東京都立科学技術大学; 宇宙航空研究開発機構 宇宙科学研究本部
Author Affiliation(eng)Tokyo Metropolitan Institute of Technology; Japan Aerospace Exploration Agency Institute of Space and Astronautical Science; Tokyo Metropolitan Institute of Technology; Japan Aerospace Exploration Agency Institute of Space and Astronautical Science
Issue Date2005-03
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
Publication title宇宙利用シンポジウム 第21回 平成16年度
Space Utilization Research: Proceedings of the Twenty-first Space Utilization Symposium
Start page13
End page16
Publication date2005-03
AbstractIt is known that no rare earth iron garnet can form with a lattice parameter greater than 1.2540 nm which is Maximum Lattice Constant (MLC). In the present study, the melt with Nd(x)Sm(3-x)Fe5O12 composition was undercooled in an aerodynamic levitator and splat-quenched by copper anvils in order to obtain the metastable garnet phase with the lattice parameter greater than MLC (x = 0.38). X-Ray Diffraction (XRD) results indicated that the peak intensity of metastable garnet phase decreased with increasing the substitution x from 0.38 to 0.2 and finally disappeared at x = 2.2. The metastable garnet phase possessed the same composition as the starting composition. The maximum Nd substitution obtained using the splat quenching method was x = 2.0. Moreover, the amorphous phase was found in the central part of the sample, which was confirmed by micro focus XRD.
Keywordssupercooling; rare earth compound; levitation; containerless melt; nucleation; garnet; aerodynamic levitator; maximum lattice constant; rare-earth iron garnet; stable perovskite; 過冷却; 希土類化合物; 浮遊; 無容器融液; 核形成; ガーネット; ガス浮遊炉; 最大格子定数; 希土類鉄ガーネット; 安定ガーネット
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会

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