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Systematic assessment of the compositional dominance over physico-chemical properties in the SiO2-Al2O3-B2O3 based glassy networks
Authors: Hruska Branislav | Svoboda Roman | Nowicka Aleksandra | Michalkova Jaroslava | Pecusova Beata | Michalik Jakub | Chromcikova Maria
Year: 2025
Type of publication: článek v odborném periodiku
Name of source: Journal of Non-Crystalline Solids
Publisher name: Elsevier B.V.
Place: Amsterdam
Page from-to: 123414
Titles:
Language Name Abstract Keywords
cze Systematické hodnocení dominance složení nad fyzikálně-chemickými vlastnostmi ve skelných sítích na bázi SiO2-Al2O3-B2O3 Série sedmi aluminoborátových skel byla studována termo-analytickými a spektroskopickými metodami. Byl zkoumán vliv různých sklotvorných oxidů na měřené vlastnosti. Kompoziční korelace vlastností byla získána pomocí multilineární regresní analýzy. Základní fyzikálně-chemické vlastnosti jako jsou hustota a index lomu byly nalezeny být lineární kombinací vlastností oxidů tvořících trojrozměrnou strukturní síť. aluminoborosilikátová skla; Ramanova spektroskopie; skelný přechod; viskozita; multilinieární regrese
eng Systematic assessment of the compositional dominance over physico-chemical properties in the SiO2-Al2O3-B2O3 based glassy networks Series of seven aluminoborosilicate glasses was studied by means of thermo-analytical and spectroscopic methods to identify the influence of the individual network-forming oxides (SiO2, Al2O3 and B2O3) on the particular classes of measured properties. The compositional correlation of the observed trends was enumerated by means of multilinear regression analysis. The base physico-chemical properties, such as density, refractive index and molar refractivity, were found to be a linearly additive combination of the roughly equally weighted contributions of the three network-forming oxides. The thermo-mechanical properties, i.e., the glass transition temperature (determined from volume, enthalpy and viscosity measurements) as well as coefficients of thermal expansion, were dominantly determined by the Al2O3 content. On the other hand, the internal properties of the viscous flow measured in the 107 - 1011 Pa & sdot;s range, i.e., the activation energy of viscous flow and kinetic fragility (defined under the Angell's concept) were driven by the B2O3 content. Aluminoborosilicate glass; Raman spectroscopy; Glass transition; Viscosity multilinear regression

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