open access

https://hdl.handle.net/2115/75700

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

英語

DHTT

2002-01-15

日本鉄鋼協会

ISIJ International

42(1)

71-79

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.

学術雑誌論文

Version of Record

著作権は日本鉄鋼協会にある

0915-1559

AA10680712