Precise Density Measurements for Electromagnetically Levitated Liquid Combined with Surface Oscillation Analysis |
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Authors: | Masayoshi Adachi Tomowo Aoyagi Akitoshi Mizuno Masahito Watanabe Hidekazu Kobatake Hiroyuki Fukuyama |
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Affiliation: | (1) Department of Physics, Gakushuin University, 1-5-1 Mejiro, Tokyo 171-8588, Japan;(2) Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan |
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Abstract: | A new method is proposed for accurately measuring the densities of high-temperature liquids which involves analyzing the surface
oscillations of levitated droplets. This method makes it easy to improve on the accuracy of density measurements obtained
by using conventional electromagnetic levitation systems. In addition, the errors in density measurements made on the ground
are further reduced by applying a static magnetic field to suppress surface oscillations in levitated liquid droplets. The
magnetic field interacts with electrical currents in the levitated droplet, thereby generating a Lorentz force; this force
suppresses flow within the liquid droplet. By combining both these methods, the scatter in density measurements for molten
Si at temperatures in the range from 1,500 K to 1,900 K is reduced by an order of magnitude compared with previously reported
data. Using this new method, the density of molten SiGe has been measured at temperatures from 1,350 K to 1,650 K. |
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Keywords: | Density Electromagnetic levitation Molten Si Molten SiGe Surface oscillations |
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