Chemical durability, thermal stability and spectroscopic studies of the influence of Ni2+ ions in oxyfluorophosphate glasses

Impact of high NiO content on the structural, optical, and dielectric properties of calcium lithium silicate glasses

“…The transparent glasses and ceramics doped with NiO have received interest for use in broadband optical amplifiers and tunable lasers due to its broad and extended emission in the wavelength spectrum covering the whole optical communication windows [13][14][15]. Both tetrahedral and octahedral positions in the glass network are occupied by nickel ions, when they are incorporated into base glass [16], and produce different colors depending on the equilibrium between nickel ions in the sixfold NiO 6 and fourfold NiO 4 coordination [17].…”

The effect of mixed La-Y doping on water resistance of phosphate glass

“…The band at 1174−1191 cm -1 is related to symmetric stretching vibrations of non-bridging oxygens of O−P−O linkages of (PO 2 ) − groups in Q 2 units [45,49]. The wavenumber of the band at 1248−1257 cm -1 is ascribed to asymmetric stretching vibrations of non-bridging oxygens of O−P−O linkages of (PO 2 ) − groups in Q 2 units [49,50]. The band at 1300−1329 cm -1 is attributed to P=O asymmetric stretching mode of the phosphate tetrahedra [52].…”

“…The vibrational band centered at 720−730 cm -1 is due to symmetric stretching vibrations of P−O−P in the Q 2 tetrahedron [47,48]. The band appeared at 777−783 cm -1 is assigned to symmetric stretching vibrations of the bridging oxygen of P−O−P linkages of (PO 3 ) 2groups in Q 1 structural units [49,50]. The band at 882−896 cm -1 is assigned to asymmetric stretching vibrations of P−O−P in Q 2 units linked with linear metaphosphate chain [45][46][47].…”

“…The peak around 925−933 cm -1 can be considered as asymmetric stretching vibrations of P-O-P in Q 2 units linked with large metaphosphate rings [46][47][48]. The band around 1001−1013 cm -1 is ascribed to symmetric stretching vibrations of P−Obonds of (PO 4 ) 3− groups in Q 0 units [45,49,50]. The assignment of the band between 1091 and 1113 cm -1 is associated to asymmetric stretching mode of chain-terminating Q 1 groups [45,51].…”

“…The bands at 1372−1411 cm -1 is attributed to P=O stretching mode of the phosphate tetrahedra [52]. [49,50] 1300−1329 P=O asymmetric stretching mode of the phosphate tetrahedra [52] 1372−1411 P=O stretching mode of the phosphate tetrahedra [52] Deconvolution parameters of FT-IR spectra for studied glasses are listed in Table 3. The Q (2) is used to quantify the changes of relative contents of Q 2 and Q 1 units, which represents the content of Q 2 structural units as a percentage of the total contents of Q 1 and Q 2 in glass.…”