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Factors on the Measurement of Effective Thermal Diffusivity of Molten Slag Using Double Hot Thermocouple Technique

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Title: Factors on the Measurement of Effective Thermal Diffusivity of Molten Slag Using Double Hot Thermocouple Technique
Authors: Kashiwaya, Yoshiaki Browse this author →KAKEN DB
Ishii, Kuniyoshi Browse this author
Keywords: thermal diffusivity
thermal conductivity
slag melt
laser flash
hot thermocouple
Issue Date: 15-Jan-2002
Publisher: Iron and Steel Institute of Japan
Journal Title: ISIJ International
Volume: 42
Issue: 1
Start Page: 71
End Page: 79
Publisher DOI: 10.2355/isijinternational.42.71
Abstract: The molten slags that are used not only in the continuous caster but also in every metal industry play an important role and affect the quality of products. The authors initially developed the double hot thermocouple technique (DHTT) for in situ observation of mold slag crystallization. In this study, the DHTT was further developed to allow the measurement of the overall thermal diffusivity of molten slag applying the principle of the laser flash method. The affecting factors (finite pulse time, shape of pulse and heat loss from sample surface) on the measurement of thermal diffusivity using the DHTT were discussed theoretically using both the analytical and the numerical methods. New relationship between the thermal diffusivity a and the time at half-maximum temperature t0.5 was obtained as follows: a(×104m2/s) = 0.000707(t0.5/tp)-1.8946 The thermal diffusivity obtained from the experimental half-maximum time t0.5/tp (tp is the time of peak on the heat pulse) was in good agreement with the one from literature.
Rights: 著作権は日本鉄鋼協会にある
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 柏谷 悦章

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