Thermophysical properties of liquid and supercooled rare earth elements measured by an electrostatic levitator
| Autor: | Paradis, Paul-Francois, Ishikawa, Takehiko, Watanabe, Yuki, Koike, Noriyuki |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
lanthanum
粘度 静電浮遊 プラセオジム 過冷却 interfacial tension ランタン 界面張力 Physics::Fluid Dynamics ネオジム Condensed Matter::Superconductivity 無容器メルト terbium 希土類元素 テルビウム supercooling containerless melt electrostatic levitation praseodymium thermophysical property rare earth element liquid metal viscosity rare earth elements liquid density surface tension viscosity 熱物性 液体金属 neodymium |
| Zdroj: | 宇宙航空研究開発機構研究開発報告 = JAXA Research and Development Report. :1-14 |
| ISSN: | 1349-1113 |
| Popis: | Thermophysical 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. 資料番号: AA0063800000 レポート番号: JAXA-RR-07-014E |
| Databáze: | OpenAIRE |
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