JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
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titleNon-contact thermophysical property measurements of liquid and supercooled osmium
Other TitleNon-contact thermophysical property measurements of liquid and supercooled osmium
Author(jpn)石川 毅彦; Paradis, Paul-Francois; 古池 紀之
Author(eng)Ishikawa, Takehiko; Paradis, Paul-Francois; 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; 千葉工業大学
Author Affiliation(eng)Japan Aerospace Exploration Agency; Japan Aerospace Exploration Agency; Chiba Institute of Technology
Issue Date2007-03-31
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication date2007-03-31
AbstractIn a first step of a comprehensive study of the macroscopic and microscopic properties and structure of osmium, solid samples were successfully levitated, melted, deeply undercooled and re-solidified under vacuum. Using non-contact diagnostic methods, several properties of equilibrium and non-equilibrium liquid osmium were measured. Over the 2,670-3,380 K temperature range, the density could be expressed as rho(T) = 1.91 x 10(exp 4) - 1.16 (T-T(sub m)) kg/cu m, where T(sub m) is the melting temperature (T(sub m) = 3,306 K). Similarly, the surface tension and the viscosity measurement data could be fitted respectively as gamma(T) = 2.48 x 10(exp 3) - 0.34 (T-T(sub m)) mN/m and eta(T) = 0.00167 exp[2.2 x 10(exp 5)]/(RT)] mPa s over the 3,230-3,605 K temperature interval.
DescriptionJAXA Research and Development Report
Keywordsosmium; thermophysical property; density; surface tension; viscosity; temperature dependence; levitation melting; furnace; supercooling; electrostatic levitation; position detector; non-contact measurement; experimental uncertainty; オスミウム; 熱物理的性質; 密度; 表面張力; 粘性; 温度依存性; 浮遊溶融; 炉; 過冷却; 静電浮遊; 位置検出器; 非接触測定; 実験的不確かさ
Document TypeTechnical Report
JAXA Category研究開発報告
Report NoJAXA-RR-06-012E

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