Structural analysis and devitrification of glasses based on the CaO–MgO–SiO2 system with B2O3, Na2O, CaF2 and P2O5 additives

摘要: Abstract Glasses, whose basic composition was based on the CaO–MgO–SiO 2 system and doped with B O 3 , P 5 Na O, CaF were prepared by melting at 1400 °C for 1 h. Raman infrared (IR) spectroscopy revealed that main structural units in glass network predominantly Q 1 silicate species. The presence of phosphate borate structure glasses also evident these spectra. X-ray analysis showed investigated devitrified 750 °C higher temperatures. crystalline phases diopside wollastonite dominated, but weak peaks, assigned to akermanite fluorapatite, registered diffractograms. had a negligible influence assemblage crystallized phases, it caused reduction crystallization temperature, comparing similar system.