Phosphate speciation in sodium borosilicate glasses studied by nuclear magnetic resonance

Preparation of spherical and dense Na2O–B2O3–SiO2 glass powders by ultrasonic spray pyrolysis technique

“…Also the powders prepared at high temperatures show glass transition characteristic at 520°C (see Fig. 4) which is close to the glass transition temperatures of sodium borosilicate glasses given in literature [33]. These characteristics may be attributed to the fact that the powders produced by spray pyrolysis technique at high temperatures have glass structure.…”

MAS-NMR study of lithium zinc silicate glasses and glass-ceramics with various ZnO content

“…All spectra show two broad resonances positioned at 9.5 and À1.5 ppm, with strong and low intensity, respectively. They are assigned to Q 0 and Q 1 structural units, respectively [20]. Whatever the ZnO content of the LZSH glasses, the relative amount of Q 0 sites remains larger than that of Q 1 sites and no significant variation of the intensities is observed.…”

Thermodynamic Assessment of the System CaO–P2O5: Application of the Ionic Two‐Sublattice Model to Glass‐Forming Melts

“…However, experimental studies on several phosphate glasses put in evidence deviations with respect to the ideal constitution 29,30,32–36 . The speciation of P 2 O 5 in calcium phosphate glasses has been experimentally established from IR, Raman, and NMR studies up to a composition lower than ∼75 mol% of CaO.…”

“…The parameters of the liquid phase, the experimental data related to the invariant points of the CP, C2P, C3P, and C4P compounds, 21–59 were also used in the optimization. The thermodynamic data regarding the enthalpy of fusion (Δ H fusion ) and entropy of fusion (Δ S fusion ) of CP, 45 C2P, 44,46,59,60,62 and C3P 44,59,62 compounds were considered as well.…”