ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
Regular Article
Effects of Supercooling Degree and Specimen Size on Supercooling Duration of Erythritol
Takahiro AdachiDdamulira DaudahGaku Tanaka
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2014 Volume 54 Issue 12 Pages 2790-2795

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Abstract

The duration of supercooling for erythritol, a promising phase change material with a melting point of 118°C, was investigated in a glass tube using three small specimen volumes of 0.025, 0.40, and 16.0 cm3 in glass tube diameters of 1.02, 10.0, and 27.3 mm, respectively. The supercooling duration was measured by the temperature increase of the specimen due to the release of latent heat under a constant degree of supercooling from 38 to 98°C. The supercooling duration was largely dependent on the supercooling degree and specimen sizes, and increased from approximately 0.1 to 20000 min with a decrease in the supercooling degree and specimen size. The effects of the supercooling degree and specimen size on the supercooling duration are discussed in terms of the Johnson-Mehl-Avrami equation and three nucleation theories based on the observed solidification position; homogeneous nucleation, heterogeneous nucleation from the wall, and heterogeneous nucleation from insoluble particles.

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© 2014 by The Iron and Steel Institute of Japan
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