TY - JOUR
T1 - Thermal Conductivity of Sodium Silicate Glasses and Melts
T2 - Contribution of Diffusive and Propagative Vibration Modes
AU - Sukenaga, Sohei
AU - Endo, Takahiko
AU - Nishi, Tsuyoshi
AU - Yamada, Hiroki
AU - Ohara, Koji
AU - Wakihara, Toru
AU - Inoue, Koji
AU - Kawanishi, Sakiko
AU - Ohta, Hiromichi
AU - Shibata, Hiroyuki
N1 - Funding Information:
This work was performed under the Cooperative Research Program of “NJRC Mater. and Dev.” This work was also partially supported by JSPS KAKENHI (Grant Number 19K05106).
Publisher Copyright:
Copyright © 2021 Sukenaga, Endo, Nishi, Yamada, Ohara, Wakihara, Inoue, Kawanishi, Ohta and Shibata.
PY - 2021/11/1
Y1 - 2021/11/1
N2 - The thermal conductivity of silicate melts and glasses is an important physical property for understanding the temperature distribution in high-temperature metallurgical processes; however, the mechanism of heat conduction in these non-crystalline materials remains unclear. Two types of vibration modes must be considered to understand the mechanism of heat conduction, namely, propagative and diffusive vibration modes. In the present study, we carefully derived the thermal conductivity of pure silica and sodium disilicate glasses and melts, and estimated the contribution of the diffusive vibration mode using a recently developed model. The results indicated that the diffusive vibration mode was not dominant in the silicate non-crystalline materials, whereas the propagative vibration mode (i.e., phonons) was dominant in the heat conduction of silicate glasses and melts, which is in contrast with borate glasses.
AB - The thermal conductivity of silicate melts and glasses is an important physical property for understanding the temperature distribution in high-temperature metallurgical processes; however, the mechanism of heat conduction in these non-crystalline materials remains unclear. Two types of vibration modes must be considered to understand the mechanism of heat conduction, namely, propagative and diffusive vibration modes. In the present study, we carefully derived the thermal conductivity of pure silica and sodium disilicate glasses and melts, and estimated the contribution of the diffusive vibration mode using a recently developed model. The results indicated that the diffusive vibration mode was not dominant in the silicate non-crystalline materials, whereas the propagative vibration mode (i.e., phonons) was dominant in the heat conduction of silicate glasses and melts, which is in contrast with borate glasses.
KW - density
KW - diffusons
KW - heat capacity
KW - laser-flash method
KW - phonon mean free path
KW - propagons
KW - silicate glass and melt
KW - thermal conductivity
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U2 - 10.3389/fmats.2021.753746
DO - 10.3389/fmats.2021.753746
M3 - Article
AN - SCOPUS:85119283451
SN - 2296-8016
VL - 8
JO - Frontiers in Materials
JF - Frontiers in Materials
M1 - 753746
ER -