To investigate the key factors governing thermal conductivity in silicate glasses, we focused on a glass series where magnesium substitutes calcium for systematic investigation. With the increasing magnesium content, the thermal conductivity (κ) shows a linearly increasing trend. Based on the phonon gas model, Debye sound velocity, phonon mean free path and κ maintain strongly correlate near-linear relationships. Moreover, the volumetric heat capacity remains relatively invariant across compositions. Given the inherent strong phonon scattering characteristic of amorphous systems, the phonon mean free path in this glass series shows constrained variation. which restricts the behavior and establishes Debye sound velocity as the principal determinant governing κ evolution. The observed linear variation in thermal conductivity arises from the common linear trends of the debye sound velocity, volumetric heat capacity and phonon mean free path with respect to the substitution of magnesium ions for calcium ions.
| [1] |
Shan ZT, Zhao TY, Ke XF, et al. . Oxygen Tri-Clusters Make Glass Highly Crack-resistant[J]. Acta Materialia, 2024, 262: 119 425
|
| [2] |
Xiao GZ, Tao YH, Zhou HM, et al. . Mixed Alkali-zinc Effects on Thermo-mechanical Properties in Borosilicate Glasses[J]. Journal of Wuhan University of Technology-Mater. Sci. Ed., 2024, 39: 1 093
|
| [3] |
Ke XF, Huang MJ, Qiao A, et al. . Tuning Thermal and Mechanical Performances by Substitution of Divalentcations in Aluminosilicate Glasses[J]. Journal of Non-Crystalline Solids, 2024, 630: 122896 1–9
|
| [4] |
Zhou HM, Xiao GZ, Zheng QS, et al. Impacts of Substitution of Alkali by Zinc on Thermo-Mechanical Properties in Borosilicate Glasses [J]. Ceramics International, 2024(50): 33 325–33 332
|
| [5] |
Ke XF, Shan ZT, Li ZH, et al. . Toward Hard And Highly Crack Resistant Magnesium Aluminosilicate Glasses and Transparent Glass Ceramics[J]. Journal of the American Ceramic Society, 2020, 103(6): 3 600-3 609
|
| [6] |
Shan ZT, Liu SJ, Tao HZ, et al. . Mixed Alkaline-Earth Effects on Several Mechanical and Thermophysical Properties of Aluminate Glasses and Melts[J]. Journal of the American Ceramic Society, 2019, 102(3): 1 128-1 136
|
| [7] |
Qiao A, Ren JJ, Tao HZ, et al. . Percolative Channels for Superionic Conduction in an Amorphous Conductor[J]. J. Phys. Chem. Lett., 2022, 13: 10 507-10 512
|
| [8] |
Zheng QS, Deng L, Wang FM, et al. Transparent Glass-Ceramics Achieved by Inward Orientational Growth of Single Crystals[J]. Journal of Non-Crystalline Solids, 2025(657): 123 505
|
| [9] |
Chen SL, Zhang Q, Cai YT, et al. Magnesium and Calcium Mixed Effect on Thermal Conductivity in A Borosilicate Glass[J]. Journal of Non-Crystalline Solids, 2025(658): 123 522
|
| [10] |
Kim Y, Morita K. Temperature Dependence and Cation Effects in the Thermal Conductivity of Glassy and Molten Alkali Borates[J]. Journal of Non-Crystalline Solids, 2017, 471: 187-194
|
| [11] |
Zhang Q, Chen SL, Cai YT, et al. . Sodium and Potassium Mixed Effect on Thermal Conductivity in a Borosilicate Glass[J]. Phys. Chem. Chem. Phys., 2025, 666: 123 669
|
| [12] |
Kim H, Yang Y, Tokunaga H, et al. . Theoretical Study of the Thermal Conductivity of Silica Glass-Crystal Composites[J]. Journal of the American Ceramic Society, 2023, 106(2): 977-987
|
| [13] |
Beekman M, Cahill D G. Inorganic Crystals With Glass Like and Ultralow Thermal Conductivities[J]. Crystal Research and Technology, 2017, 52(10): 1 700 114
|
| [14] |
Sørensen S S, Johra H, Mauro J C, et al. . Boron Anomaly in the Thermal Conductivity of Lithium Borate Glasses[J]. Physical Review Materials, 2019, 3(7): 075 601
|
| [15] |
Feldman J L, Kluge M D, Allen P B, et al. . Thermal Conductivity and Localization in Glasses: Numerical Study of a Model of Amorphous Silicon[J]. Physical Review B, 1993, 48(17): 12 589
|
RIGHTS & PERMISSIONS
Wuhan University of Technology and Springer-Verlag GmbH Germany, Part of Springer Nature
PDF
