Development of Hot-Disk Sensor for Molten Metal, and the Thermal Conductivity Measurement of Molten Bismuth and Tin using Hot-Disk Method

概要

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The thermal conductivities of molten bismuth and tin were measured using the hot-disk method. A 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 plates (plate thickness, 0.05 mm). Aluminum nitride did not corrode because of its contact with a molten metal and thus the molybdenum foil was protected from the molten metal. The thermal conductivities of molten bismuth and tin were measured during a short-duration of microgravity using a 10 m drop tower, to confirm the thermal convection effect during the measurement. The thermal conductivities measured in normal gravity were found to be approximately equal to those measured during the microgravity (during microgravity, thermal convection is suppressed), up to 977 K. Moreover, at 1083 K, normal gravity results were found to be higher than microgravity results.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2006-08-15