A New Method for Apparent Thermal Conductivity Determination for Sheet Samples Utilizing Principle of Bunsen Ice Calorimeter

Li, Mu; Endo, Rie; Wang, Li J.; Li, Lei; Susa, Masahiro

doi:10.2355/isijinternational.isijint-2015-531

Cited by 7 publications

(2 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…16) At present, the latter two techniques have been limited to measurements at room temperature only. Thus, a method to determine the temperature-dependent thermal conductivities/diffusivities of iron oxide scales produced on iron/steel substrates by thermal oxidation is still required, alongside a close examination of the FeO decomposition.…”

Section: Introductionmentioning

confidence: 99%

Temperature Dependence of Thermal Diffusivity and Conductivity of FeO Scale Produced on Iron by Thermal Oxidation

Endo

Akoshima³

et al. 2017

ISIJ International

Self Cite

View full text Add to dashboard Cite

The thermal diffusivity/conductivity of FeO scales produced on iron substrates by thermal oxidation have been determined as functions of temperature. Iron plates (99.99%) were oxidised at 973 K in air to obtain oxide scales of FeO, Fe 3 O 4 , and Fe 2 O 3 , and then were reduced at 1 273 K in nitrogen to obtain FeO-only. The densities of these scales were 5.85-6.05 g cm − 3 . The laser flash method was used to measure the apparent thermal diffusivity of the whole sample from room temperature to 1 164 K during the heating/ cooling cycles. This was converted to the thermal diffusivity of the scale only, which in turn was converted to the thermal conductivity. However, these values depended on the scale thickness, which suggests an interfacial heat resistance occurs between the scale layer and iron substrate. In addition, scanning electron microscopy (SEM) observations revealed that the scales contained Fe and Fe 3 O 4 phases after heating. The scale thermal diffusivity/conductivity were corrected considering the interfacial heat resistance and dispersed phases to derive the corresponding values for FeO only. The interfacial heat resistance derived from the thickness dependence of the scale thermal conductivity was 8.3 × 10 − 6 m 2 K W − 1 . Using this value, the thermal diffusivity of FeO was derived as 3.7 × 10 − 7 -5.8 × 10 − 7 m 2 s − 1 and the thermal conductivity as 1.8-2.5 W m − 1 K − 1 between room temperature and 1 164 K. The temperature coefficients of the thermal conductivity were mostly negative, which would be dominated by the phonon mean free path.

show abstract

Section: Introductionmentioning

confidence: 99%

Temperature Dependence of Thermal Diffusivity and Conductivity of FeO Scale Produced on Iron by Thermal Oxidation

Endo

Akoshima³

et al. 2017

ISIJ International

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thus, the ice calorimeter has high significance for the foundry industry as an easy-to-use device for prefurnace analysis. [17][18][19] Recently, Li et al 20) successfully applied this method for measuring macroscopic heat flux. An apparatus to measure the heat flux through a sheet sample was proposed to determine its thermal conductivity.…”

Section: Measurement Of Exothermic Values Of Casting-sleeve Materials...mentioning

confidence: 99%

Measurement of Exothermic Values of Casting-sleeve Materials Using an Ice Calorimeter

2023

View full text Add to dashboard Cite

A New Method for Apparent Thermal Conductivity Measurement of Mould Flux

Endo

Wang

Susa

2016

Advances in Molten Slags, Fluxes, and Salts

View full text Add to dashboard Cite

A New Method for Apparent Thermal Conductivity Determination for Sheet Samples Utilizing Principle of Bunsen Ice Calorimeter

Cited by 7 publications

References 12 publications

Temperature Dependence of Thermal Diffusivity and Conductivity of FeO Scale Produced on Iron by Thermal Oxidation

Temperature Dependence of Thermal Diffusivity and Conductivity of FeO Scale Produced on Iron by Thermal Oxidation

Measurement of Exothermic Values of Casting-sleeve Materials Using an Ice Calorimeter

A New Method for Apparent Thermal Conductivity Measurement of Mould Flux

Contact Info

Product

Resources

About