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Article
Open AccessThermodynamic model of 45S5 bioglass
Shakhmatkin and Vedishcheva thermodynamic model (SV TDM) of 45S5 bioglass was evaluated at T = 800 K. From 42 considered system components, only 7 components (Na2O⋅SiO2, Na2O⋅3CaO⋅6SiO2, 3CaO⋅2SiO2, CaO⋅SiO2, 9Na
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Article
Open AccessNo logarithmic corrections to entropy in shift-symmetric Gauss-Bonnet gravity
Employing the covariant phase space formalism, we discuss black hole thermodynamics in four-dimensional scalar-tensor Einstein-Gauss-Bonnet gravity. We argue that logarithmic corrections to Wald entropy previo...
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Article
Open AccessThermal properties and thermodynamic model of lithium doped 45S5 bioglass
Shakhmatkin and Vedishcheva thermodynamic model (SV TDM) of the 45S5 Bioglass® doped with three different amounts of Li2O (4.1, 9.9, and 12.3 mol%) was evaluated at T = 800 K. The 55 components of SV TDM were con...
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Article
Open AccessInterpretation of experimental findings on the structure of glass in the CaO–MoO3–P2O5 system using a thermodynamic model including oxidation–reduction equilibria
This work extends the thermodynamic model of associated solutions used in the past to describe the structure and properties of glasses to the area of complex multicomponent glasses with polyvalent elements, wh...
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Article
Thermodynamic model and surface-active components of barium crystal glass
The surface tension of fifteen glass-forming melts was measured by sessile drop profile analysis. The glass compositions were based on barium crystal glass [(10.49 Na2O·2.36 K2O·9.06 CaO·0.78 ZnO·2.44 BaO·0.85 Al
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Article
Open AccessCorrection to: Thermodynamic model and Raman spectra of MgO–P2O5 glasses
The original article has been corrected.
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Article
Open AccessThermodynamic model and Raman spectra of MgO–P2O5 glasses
The structure of binary glasses xMgO·(1−x)P2O5 (x = 0.30, 0.35, 0.40, 0.45, 0.50, and 0.55) was studied by thermodynamic model (TDM) of Shakhmatkin and Vedishcheva (SV) and Raman spectroscopy. In the TDM, six fol...
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Article
Open AccessCorrection to: Structure and Raman spectra of binary barium phosphate glasses
The article Structure and Raman spectra of binary barium phosphate glasses.
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Article
Open AccessStructure and Raman spectra of binary barium phosphate glasses
The structure of xBaO·(1 − x) P2O5 (x = 0.30, 0.35, 0.40, 0.45, and 0.50) glasses was studied by Raman spectroscopy and thermodynamic model Shakhmatkin and Vedishcheva (SVTDM). The seven system components (define...
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Article
Thermodynamic model and Raman spectra of binary barium borate glassforming melts
The set of 34 baseline subtracted and thermally corrected Raman spectra of BaO–B2O3 glassforming melts with the composition xgBaO–(1 − xg)B2O3 (xg = 0.20; 0.25; 0.30; 0.35; 0.40; 045; 0.50; 0.55; 0.60) measured a...
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Article
Optical microscopy, Raman spectroscopy, and AFM study of heavy weathered surface of barium crystal glass
Glass samples of barium crystal glass (handmade and produced by automatic technology) were weathered at controlled conditions. On the weathered glass surface, the high number of corrosion products of approxima...
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Article
Thermodynamic model and high-temperature Raman spectra of 25Na2O·75B2O3 glassforming melts
The temperature dependence of Raman spectra of 25Na2O·75B2O3 melts recorded in the temperature range 321–1142 °C was studied by statistical methods (principal component analysis, PCA, and multivariate curve resol...
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Article
Viscosity and configuration entropy of glasses for CHROMPIC vitrification
The composition and temperature dependence of viscosity and configuration entropy of glasses with chemical composition close to that used for CHROMPIC radioactive waste vitrification were studied. The composi...
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Article
Structural relaxation of lead and barium-free crystal glasses
The structural relaxation of Na2O–K2O–CaO–ZrO2–SiO2 (NKCZ), Na2O–K2O–ZnO–ZrO2–SiO2 (NKzZ), Na2O–CaO–ZnO–ZrO2–SiO2 (NCzZ), K2O–CaO–ZnO–ZrO2–SiO2 (KCzZ), and Na2O–K2O–CaO–ZnO–ZrO2–SiO2 (NKCzZ) glasses were studied ...
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Parameterization and Validation of Thermochemical Models of Glass by Advanced Statistical Analysis of Spectral Data
Shakhmatkin and Vedishcheva proposed the associated solutions’ thermodynamic model (SVTDM) of glasses and glass-forming melts. This model considers glasses and melts as an ideal solution formed from saltlike p...
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Article
Thermodynamic model and Raman spectra of CaO–P2O5 glasses
The structure of glasses of the binary system CaO–P2O5 was investigated by the comparison of the results of the thermodynamic model of Shakhmatkin and Vedishcheva constructed using the molar Gibbs energies obtain...
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Article
Thermodynamic model and Raman spectra of ZnO–P2O5 glasses
Raman spectra of xZnO (100−x)P2O5 (x = 35, 40, 45, 50, 55) glasses were described by the thermodynamic model of Shakhmatkin and Vedishcheva using the method of Malfait. The glasses were considered as the ideal so...
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Article
Structure of Na2O–MgO–CaO–SiO2 glasses by combined Raman spectroscopy and thermodynamic modeling approach
The present contribution deals with the Raman spectra and structure of Na2O–MgO–CaO–SiO2 glasses. Six glasses with the trisilicate overall composition 15Na2O·xMgO·(10–x)CaO·75SiO2 (x = 0, 2, 4, 6, 8, 10) were stu...
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Article
Thermodynamic model and viscosity of Ge–S glasses
The structure–viscosity relationship of GexS(1−x) (x = 0.30, 0.32, 0.33, 0.333, 0.34, 0.36, 0.38, 0.40, 0.42, and 0.44) glass melts was studied. The structure of studied glass melts was described by the thermodyn...
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Article
Benthic macroinvertebrates along the Czech part of the Labe and lower section of the Vltava rivers from 1996–2005, with a particular focus on rare and alien species
In the Czech part of the Labe River and the lower part of the Vltava River, we examined if the benthic macroinvertebrate composition changed from 1996 to 2005 due to expected improvements in water quality resu...
