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titleThermophysical properties of liquid and supercooled rare earth elements measured by an electrostatic levitator
Other TitleThermophysical properties of liquid and supercooled rare earth elements measured by an electrostatic levitator
Author(jpn)石川 毅彦; Paradis, Paul-Francois; 渡辺 勇基; 古池 紀之
Author(eng)Ishikawa, Takehiko; Paradis, Paul-Francois; Watanabe, Yuki; Koike, Noriyuki
Author Affiliation(jpn)宇宙航空研究開発機構; 宇宙航空研究開発機構; エイ・イー・エス; 千葉工業大学
Author Affiliation(eng)Japan Aerospace Exploration Agency; Japan Aerospace Exploration Agency; Advanced Engineering Services Co. Ltd.; Chiba Institute of Technology
Issue Date2008-02-29
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication date2008-02-29
AbstractThermophysical properties of four rare earth elements, namely Lanthanum (La), Praseodymium (Pr), Neodymium (Nd), and Terbium (Tb) have been measured using electrostatic levitation techniques. The understanding of the nature and behavior of rare earth metals in their liquid phases requires accurate values of their physical properties. However, keeping samples in their liquid phases free from contamination long enough to carry out measurements represents a formidable challenge. This is due to high reactivity and melts contamination of these elements with crucibles or gaseous environment. The use of an electrostatic levitator in vacuum conditions circumvents these difficulties and permits the measurements of the density, the surface tension, and the viscosity of these metals above and below their melting temperature. In this paper, the measurement methods as well as the levitation apparatus are introduced and measured values are reported.
DescriptionJAXA Research and Development Report
Keywordsthermophysical property; rare earth element; supercooling; liquid metal; containerless melt; electrostatic levitation; lanthanum; praseodymium; neodymium; terbium; interfacial tension; viscosity; 熱物性; 希土類元素; 過冷却; 液体金属; 無容器メルト; 静電浮遊; ランタン; プラセオジム; ネオジム; テルビウム; 界面張力; 粘度
Document TypeTechnical Report
JAXA Category研究開発報告
Report NoJAXA-RR-07-014E

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