Viscosity, thermal conductivity, and surface tension of high-temperature melts

Nagashima, Akira

doi:10.1007/bf01133571

Cited by 36 publications

(12 citation statements)

References 15 publications

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confidence: 99%

“…[3][4][5] The viscosity is also related to the electrical properties and the structure of the liquids. 5,6 However, there are only viscosity data of pure molten LiCl-KCl eutectic in a limited range of temperatures (890-1080 K). 7,8 Therefore, interpolation and extrapolation are required to determine the viscosity at a specific process condition, for example, at ca.…”

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High-Temperature Viscosity Measurement of LiCl-KCl Molten Salts Comprising Actinides and Lanthanides

Kim¹,

Bae²,

Kim³

et al. 2012

Bulletin of the Korean Chemical Society

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confidence: 99%

High-Temperature Viscosity Measurement of LiCl-KCl Molten Salts Comprising Actinides and Lanthanides

Kim¹,

Bae²,

Kim³

et al. 2012

Bulletin of the Korean Chemical Society

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“…[11][12][13] In particular, the viscosity of a material is greatly influenced by its chemical composition and crystallization. Thus, it is necessary to investigate the crystallization behavior of oxide melts to optimize their performance.…”

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confidence: 99%

Simultaneous Evaluation of Viscous and Crystallization Behaviors of Silicate Melts by Capacitance and Viscosity Measurements

et al. 2018

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This study set out to develop a device capable of simultaneously measuring viscosity and capacitance. The viscosity measurements required prior calibration of the device. However, room-temperature calibration using silicone oil is affected by the immersion depth of the rod, rotational speed of the crucible, and diameter/length of the torsion wire. The calibration results revealed that the potential produced by the torque acting on the torsion wire, generated by the viscous resistance of the silicone oil, was stable when the rod was immersed to a depth of 10 mm. Upon varying the rotational speed of the crucible and viscosity of the silicone oil, the rotational speed of the crucible was found to be proportional to the potential. Furthermore, the measured potential was found to be proportional to the viscosity. Based on the roomtemperature calibration results, the immersion depth of the rod was set to 10 mm. By adjusting the diameter and length of the torsion wire, a wide range of viscosities could be measured. High-temperature calibration was performed using the SRM2 standard-viscosity material and involved comparing the measured viscosity with the recommended value for SRM2 or with the results of viscosity measurements obtained by other laboratories. The viscosity measurements obtained in the present study were in good agreement with both the recommended values and the results obtained by other laboratories. Therefore, the device designed in the present study was capable of precisely measuring the viscosity. Finally, the device could also simultaneously measure the viscosity and capacitance of the simple 50CaO-50SiO 2 (mol%) and complex 46.4CaO-38.6SiO 2 -10CaF 2 -5B 2 O 3 and 43.6CaO-36.4SiO 2 -10CaF 2 -10B 2 O 3 (mol%) melts. Furthermore, a drastic increase in the viscosity led to a drastic decrease in the capacitance, corresponding to the crystallization of the melt, which is assumed to affect the viscosity of the melt.

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“…The surface tension is sensitive to even minute surface contamination. However, it has been measured for molten silicon and germanium at the melting points [1][2][3][4][5][6][7] and at different temperatures [8][9][10][11][12]. The surface tension of high-temperature melts is the most needed and the most poorly established property.…”

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Theoretical Study of a Thermophysical Property of Molten Semiconductors

Aqra

Ayyad

2011

Journal of Metallurgy

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This paper deals with theoretical approach to surface tension of molten silicon and germanium, and contributes to this field, which is very important. A theoretical calculation for determining the surface tension of high-temperature semiconductor melts, such as molten silicon and germanium, in the temperature range 1687-1825 K and 1211-1400 K, respectively, is described. The calculated temperature-dependence surface tension data for both Si and Ge are expressed as γ = 876 − 0.32 (T − T m ) and γ = 571 − 0.074 (T − T m ) (mJ m −2 ), respectively. These values are in consistence with the reported experimental data (720-875 for Si and 560-632 mJ m −2 for Ge). The calculated surface tension for both elements decreases linearly with temperature.

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Viscosity, thermal conductivity, and surface tension of high-temperature melts

Cited by 36 publications

References 15 publications

High-Temperature Viscosity Measurement of LiCl-KCl Molten Salts Comprising Actinides and Lanthanides

High-Temperature Viscosity Measurement of LiCl-KCl Molten Salts Comprising Actinides and Lanthanides

Simultaneous Evaluation of Viscous and Crystallization Behaviors of Silicate Melts by Capacitance and Viscosity Measurements

Theoretical Study of a Thermophysical Property of Molten Semiconductors

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