Spectroscopic investigation of P2O5–CdO–Li2O glass system

A review of the structures of oxide glasses by Raman spectroscopy

“…The band at 1120 cm À1 is shied towards the high frequency side with increase of the Li 2 O content. 164 Increasing the content of BaO in lithium barium phosphate glasses causes the intensity of all bands to be enhanced. The bands at 712 and 1163 cm À1 are shied slightly towards a lower wavenumber with an increase in BaO.…”

Electrical and dielectric analysis of lithium chloride mixed sodium and lithium phosphate glasses

“…The normalized Raman spectrum of the samples (Figure ), obtained between 200 and 1500 cm −1 , were found to be very identical. The band at 330 cm −1 is associated with the boson peaks and with internal deformation vibrations of phosphate chains and pyrophosphate segments, while the vibrations centered in the 650‐750 cm −1 range are attributed to the symmetric stretching of the P–O–P bands . The bands between 950 and 1050 cm −1 result from the symmetric stretching mode of O–P–O nonbridging oxygen ((PO 2 ) sym ) and from symmetric stretching vibrations of nonbridging oxygen in Q 1 units .…”

“…The band at 330 cm À1 is associated with the boson peaks and with internal deformation vibrations of phosphate chains and pyrophosphate segments, 32 while the vibrations centered in the 650-750 cm À1 range are attributed to the symmetric stretching of the P-O-P bands. 32 The bands between 950 and 1050 cm À1 result from the symmetric stretching mode of O-P-O nonbridging oxygen ((PO 2 ) sym ) 33 and from symmetric stretching vibrations of nonbridging oxygen in Q 1 units. 34 Finally, the peaks resulting from the stretching vibration of terminal oxygen ions in Q 2 groups can be observed around 1116 cm À1.…”

Correlation between the activation energies of structural relaxation and viscous flow for BaO–P2O5–Al2O3 glasses

“…1 for the obtained Raman spectra. Assignment of the Raman bands can be done as follows: the spectral region 250 -560 cm -1 includes bands corresponding to internal vibrations such as deformation vibrations of phosphate chains and PO 3 deformation vibrations of pyrophosphate segments [41], 680 cm -1 corresponds to symmetrical stretching vibration of bridging oxygen atoms in Q 2 units [42], 1012 cm -1 corresponds to symmetrical stretching vibration of non-bridging oxygen atoms in Q 1 units terminating the metaphosphate chains [42,43], 1161 cm -1 corresponds to symmetrical stretching vibration of non-bridging oxygen atoms in Q 2 units [41,43,44], 1250 -1300 cm -1 corresponds to asymmetric stretching vibration of the two non-bridging oxygen atoms bonded to phosphorus atom [45,46]. Compositional evolution of the above-mentioned bands intensities is in a good correspondence with the elemental analysis provided by XRF (see Table 1).…”