Study of structural modification of sodium aluminophosphate glasses with TiO2 addition through Raman and NMR spectroscopy

Homogeneous Ag2O–2P2O5–CaO–GeO2 glass formation, structural and in vitro studies

“…This effect of network modifier on phosphate glass structure has been previously observed and has been attributed to an increase in the P-O-P bond angle as the average length of the phosphate chains increases [26].…”

“…The most intense band around 1170 cm −1 and the last intense band around 1280 cm −1 in the spectrum has been attributed to the symmetric and asymmetric stretching vibration of PO 2 groups (Q 2 structural units), respectively [26]. Two weak shoulders centered at: ∼795 cm −1 ( as (P-O-P) in Q 2 species), and ∼1090 cm −1 ( s/as (PO 3 ) groups from the Q 1 species) are present [7,8].…”

Study on optical properties of La2O3–TiO2–Nb2O5 glasses prepared by containerless processing

“…The lowest frequency peak (boson peak), corresponds to the collective modes of local structures [29,30]. The band at 270 cm À 1 is due to the vibrational mode of Ti-O bonds [31,32]. With the decrease of TiO 2 , the intensity of peak is weakening, and shifts to lower frequency.…”

Energy transfer studies of Ce:Eu system in phosphate glasses

“…The bands observed around 700 cm À1 and 740 cm À1 are due to asymmetric stretching of P-O-P bridges. The bands at 510 cm À1 are due to the bending vibrations of P-O bonds [18,19]. The absorption spectrum of europium-doped sample is shown in Fig.…”