Simultaneous evaluation of viscous and crystallization behaviors of silicate melts by capacitance and viscosity measurements

Yusuke Harada, Hideaki Yamamura, Yoshiyuki Ueshima, Toshiaki Mizoguchi, Noritaka Saito, Kunihiko Nakashima

研究成果: ジャーナルへの寄稿記事

抄録

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 room-temperature 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-50SiO2 (mol%) and complex 46.4CaO-38.6SiO2-10CaF2-5B2O3 and 43.6CaO-36.4SiO2-10CaF2-10B2O3 (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.

元の言語英語
ページ(範囲)1285-1292
ページ数8
ジャーナルisij international
58
発行部数7
DOI
出版物ステータス出版済み - 7 15 2018

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Silicates
Capacitance measurement
Viscosity measurement
Crystallization
Viscosity
Silicone Oils
Calibration
Crucibles
Silicones
Torsional stress
Capacitance
Wire
Temperature
Torque

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

これを引用

Simultaneous evaluation of viscous and crystallization behaviors of silicate melts by capacitance and viscosity measurements. / Harada, Yusuke; Yamamura, Hideaki; Ueshima, Yoshiyuki; Mizoguchi, Toshiaki; Saito, Noritaka; Nakashima, Kunihiko.

:: isij international, 巻 58, 番号 7, 15.07.2018, p. 1285-1292.

研究成果: ジャーナルへの寄稿記事

Harada, Yusuke ; Yamamura, Hideaki ; Ueshima, Yoshiyuki ; Mizoguchi, Toshiaki ; Saito, Noritaka ; Nakashima, Kunihiko. / Simultaneous evaluation of viscous and crystallization behaviors of silicate melts by capacitance and viscosity measurements. :: isij international. 2018 ; 巻 58, 番号 7. pp. 1285-1292.
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abstract = "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 room-temperature 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-50SiO2 (mol{\%}) and complex 46.4CaO-38.6SiO2-10CaF2-5B2O3 and 43.6CaO-36.4SiO2-10CaF2-10B2O3 (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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