TY - JOUR
T1 - Determination of thermal conductivities of B2O3-SiO2 and CaO-B2O3-SiO2 melts
AU - Nishi, Tsuyoshi
AU - Tanaka, Kento
AU - Ohnuma, Katsuya
AU - Manako, Takumi
AU - Ohta, Hiromichi
AU - Sukenaga, Sohei
AU - Shibata, Hiroyuki
AU - Kakihara, Toshiaki
N1 - Funding Information:
This work was carried out as a part of the basic research program of vitrification technology for waste volume reduction, supported by the Ministry of Economy, Trade and Industry, Japan . The authors (T.N. and H.O.) are grateful for the financial support of the Cooperative Research Program of “Network Joint Research Center for Materials and Devices” of the Institute of Multidisciplinary Research for Advanced Materials, Tohoku University . We appreciate the kind support of J. Ojima of Nakabotec Corrosion Protecting Co., Ltd., and H. Sato and T. Uno of PASONA Co. Ltd.
Publisher Copyright:
© 2018
PY - 2018/11
Y1 - 2018/11
N2 - The thermal conductivities of borosilicate melts, which have scarcely been measured, are one of the important thermophysical properties for optimization of temperature distribution in a glass melting furnace. In this study, the thermal effusivities of B2O3-SiO2 and CaO-B2O3-SiO2 melts were first measured using a front heating–front detection laser flash method. Then, the thermal conductivities, which were obtained by combining the measured thermal effusivity data with specific heat capacity and density, could be evaluated through an equation using the least-squares method. As such, the thermal conductivities of the B2O3-SiO2 and CaO-B2O3-SiO2 melts were found to slightly linearly decrease with increasing temperature over the investigated temperature range of 1248–1723 K. In addition, the thermal conductivities of the samples of CaO-B2O3-SiO2 melts were higher than those of the samples of B2O3-SiO2 melts. Furthermore, the network models of the thermal conductivities for the B2O3-SiO2 and CaO-B2O3-SiO2 melts were discussed using the boron-11 NMR spectra of the glassy samples for the B2O3-SiO2 and CaO-B2O3-SiO2 samples.
AB - The thermal conductivities of borosilicate melts, which have scarcely been measured, are one of the important thermophysical properties for optimization of temperature distribution in a glass melting furnace. In this study, the thermal effusivities of B2O3-SiO2 and CaO-B2O3-SiO2 melts were first measured using a front heating–front detection laser flash method. Then, the thermal conductivities, which were obtained by combining the measured thermal effusivity data with specific heat capacity and density, could be evaluated through an equation using the least-squares method. As such, the thermal conductivities of the B2O3-SiO2 and CaO-B2O3-SiO2 melts were found to slightly linearly decrease with increasing temperature over the investigated temperature range of 1248–1723 K. In addition, the thermal conductivities of the samples of CaO-B2O3-SiO2 melts were higher than those of the samples of B2O3-SiO2 melts. Furthermore, the network models of the thermal conductivities for the B2O3-SiO2 and CaO-B2O3-SiO2 melts were discussed using the boron-11 NMR spectra of the glassy samples for the B2O3-SiO2 and CaO-B2O3-SiO2 samples.
KW - BO–SiO melt
KW - CaO–BO–SiO melt
KW - Front heating–front detection laser flash (FH–FDLF) method
KW - Network model
KW - Solid-state nuclear magnetic resonance (NMR) spectroscopy
KW - Thermal conductivity
KW - Thermal effusivity
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U2 - 10.1016/j.jnucmat.2018.08.010
DO - 10.1016/j.jnucmat.2018.08.010
M3 - Article
AN - SCOPUS:85051387826
SN - 0022-3115
VL - 510
SP - 193
EP - 198
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
ER -