Suchergebnisse

[EN] The structure of xBaO·(1 − x) PO (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 (defined as stable crystalline phases of the BaO–PO binary phase diagram) were considered in the SVTDM: BaO, PO, 4BaO·PO (B4P), 3BaO·PO (B3P), 2BaO·PO (B2P), BaO·PO (BP), and BaO·2 PO (BP2). Only the equilibrium molar abundances of BP and BP2 were non-negligible in all studied glass compositions. Therefore, in the next step, multivariate curve analysis (MCR) of the baseline—subtracted, thermally—corrected experimental Raman spectra, was performed for two components (BP2 and BP). MCR resulted in the Raman spectra (loadings) and relative abundances (scores) of each considered component. The MCR method reproduced 98.93% of the spectral data variance. Then, the decomposition of Malfait was used. The perfect fit between the MCR loadings and the partial Raman spectra of BP2 and BP, obtained by Malfait's decomposition, was found, confirming the validity of thermodynamic model. ; This paper is created in the frame of the Project FunGlass that has received funding from the European Union's Horizon 2020 research and innovation program under Grant Agreement No. 739566. This work was supported by The Slovak Grant Agency for Science under Grant No. VEGA 1/0064/18, and the Project Centre for Functional and Surface Functionalized Glass (CEGLASS), ITMS code is 313011R453, operational program Research and innovation, co-funded from European Regional Development Fund.