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Review of techniques for thermophysical property measurements at high temperatures

Journal Article


Abstract


  • The methods available for the measurements of the following thermophysical properties of high temperature melts are reviewed viz. density, viscosity, surface tension, heat capacity, enthalpy, thermal diffusivity and conductivity, electrical conductivity and emissivity. The methods are illustrated with reference to work carried out on molten silicon. In order to combat contamination of the melt from container/sample reactions there has been a gradual switch to the use of (i) containerless methods employing various forms of levitation or microgravity (drop towers, parabolic flights and space experiments) and (ii) sub-second rapid heating and other non-intrusive techniques. However, there are other equally-important conditions which must be addressed to obtain accurate property values, e.g. the control of oxygen partial pressure in surface tension measurements and the selection of the most reliable method to analyse data. It is our contention that equal attention should be given to these problems. © 2000 ISIJ.

Publication Date


  • 2000

Citation


  • Mills, K. C., Courtney, L., Brooks, R. F., & Monaghan, B. J. (2000). Review of techniques for thermophysical property measurements at high temperatures. ISIJ International, 40(SUPPL.). doi:10.2355/isijinternational.40.suppl_s120

Scopus Eid


  • 2-s2.0-1942493686

Web Of Science Accession Number


Volume


  • 40

Issue


  • SUPPL.

Abstract


  • The methods available for the measurements of the following thermophysical properties of high temperature melts are reviewed viz. density, viscosity, surface tension, heat capacity, enthalpy, thermal diffusivity and conductivity, electrical conductivity and emissivity. The methods are illustrated with reference to work carried out on molten silicon. In order to combat contamination of the melt from container/sample reactions there has been a gradual switch to the use of (i) containerless methods employing various forms of levitation or microgravity (drop towers, parabolic flights and space experiments) and (ii) sub-second rapid heating and other non-intrusive techniques. However, there are other equally-important conditions which must be addressed to obtain accurate property values, e.g. the control of oxygen partial pressure in surface tension measurements and the selection of the most reliable method to analyse data. It is our contention that equal attention should be given to these problems. © 2000 ISIJ.

Publication Date


  • 2000

Citation


  • Mills, K. C., Courtney, L., Brooks, R. F., & Monaghan, B. J. (2000). Review of techniques for thermophysical property measurements at high temperatures. ISIJ International, 40(SUPPL.). doi:10.2355/isijinternational.40.suppl_s120

Scopus Eid


  • 2-s2.0-1942493686

Web Of Science Accession Number


Volume


  • 40

Issue


  • SUPPL.