Thermal Conductivity Measurement of Molten Indium Antimonide Using Hot-Disk Method in Short-Duration Microgravity

概要

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The thermal conductivity of molten indium antimonide (InSb) was measured using the hot-disk method in short-duration microgravity. The hot-disk sensor was made of molybdenum foil (thickness, 20 μm; radius of sensor region, 3.05 mm) cut in a conducting pattern and placed between two aluminum nitride (AlN) plates (plate thickness, 0.05 mm). Because AlN had not chemically reacted with molten InSb, the molybdenum foil in the hot-disk sensor was completely protected against the molten InSb. The thermal conductivity of molten InSb was measured during short-duration microgravity using a 10 m drop tower to confirm the thermal convection effect during the measurement. The thermal conductivity of molten InSb measured in microgravity was 17.3 W$\cdot$m-1$\cdot$K-1 at 824 K and increased with temperature. The thermal conductivities measured in normal gravity were found to be higher than those measured in microgravity. The thermal conductivity of molten InSb at melting point (798 K), i.e., 16.5 W$\cdot$m-1$\cdot$K-1, was obtained by the extrapolation of the thermal conductivity of the molten InSb against temperature.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2007-12-15