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

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Other TitleThe promising microgravity application for the physico-chemical properties of eutectic melts
Author(jpn)伊丹 俊夫; 中川 祐介; 野崎 潔; 岸本 直也
Author(eng)Itami, Toshio; Nakagawa, Yusuke; Nozaki, Kiyoshi; Kishimoto, Naoya
Author Affiliation(jpn)北海道大学 大学院理学研究科; 北海道大学 大学院理学研究科; 北海道大学 大学院理学研究科; 北海道大学 大学院理学研究科
Author Affiliation(eng)Hokkaido University Graduate School of Science; Hokkaido University Graduate School of Science; Hokkaido University Graduate School of Science; Hokkaido University Graduate School of 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 page50
End page53
Publication date2005-03
AbstractIt is important for the advance of the microgravity science to find new subjects in which the microgravity condition influences on the physical phenomena. The eutectic liquid mixtures are expected to be the candidates. Already, by using the measurements of the electrical resistivity, rho, the giant growth of concentration fluctuations has been revealed in the homogeneous liquid phase around the eutectic composition of metal-semiconductor and metal-metal mixtures. In the present presentation, the growth of concentration fluctuations for liquid alloys with a few eutectic compositions, Cd-Sb and Zn-Sb systems will be reported. The anomalous behaviors of the temperature coefficient of rho, d rho/dT were found at both eutectic compositions on the isotherm curve of both systems. These also indicate the existence of concentration fluctuations around the eutectic composition in the homogeneous liquid phase. Similar investigation was performed also for the eutectic system of the liquid alloys with ultra low melting temperature and the fused salts. The importance of the growth of concentration fluctuation was stressed. The promising microgravity experiments were also discussed.
Keywordsmicrogravity; supercooling; eutectic composite; physical chemistry; liquid alloy; phase diagram; metal-semiconductor mixture; metal-metal mixture; homogeneous liquid phase; electrical resistivity; 微小重力; 過冷却; 共晶複合材; 物理化学; 液体合金; 状態図; 金属-半導体混合物; 金属-金属混合物; 均質液相; 電気抵抗
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会

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