Raman and FTIR spectra of iron phosphate glasses containing cerium

Spectroscopic properties of highly Nd-doped lead phosphate glass

“…7 we show the IR spectra of the glasses. The bands appearing around 1000 cm -1 are all assigned to vibrations of the P and O atoms belonging to different Q structures [27]. Even for high Nd 3+ content the features related to P-O bonds remain.…”

Rare-Earth Recovery from Soda Lime Silicate Glass Cullet by P2O5 Addition

“…When a series of phosphate concentrations (x = 45, 40,35,30,25,22,17, and 15 mol%) corresponding to A/P-ratio of 0.34, 0.43, 0.53, 0.67, 0.85, 1.01, 1.39, and 1.62, respectively, were introduced into the cullet ? Eu system, the Iratios of the resulting glasses showed a trend to level off when reaching an A/P-ratio of 1 (region A, Fig.…”

“…Eu)-xP 2 O 5 samples, the wide and intense bands in the 900-1300 cm -1 range (Fig. 5) correspond to vibrations of Si-O-Si and P-O-P linkages [31][32][33][34][35][36]. The IR spectrum for x = 15 mol% (A/Pratio = 1.62) shows intense bands at 918, 1050, and 1123 cm -1 , associated with stretching vibration of Si-O (Q 3 ), stretching vibration of Si-O-Si, and bending vibration of Si-O (Si-O-Si groups), respectively [31,32].…”

“…On the other hand, the weak bands observed in the 1000-1100 cm -1 and 1200-1260 cm -1 ranges become broad and intense with increasing P 2 O 5 addition (A/P-ratio \1). The bands in the 1000-1100 cm -1 range are associated with pyrophosphate groups (Q 1 ) [35,36], while those in the 1200-1260 cm -1 range can be assigned to asymmetric stretching of PO 2 bonds of metaphosphate groups (Q 2 ) [35,37].…”

“…Wavenumber (cm Table 3 [31,32] 1100 m as (Si-O-P) stretch [35,36] 1123 m as (Si-O), Si-O-Si groups [31,32] 1200-1260 m as (PO 2 ) stretch, Q 2 units [35,37] while 1 % of the total europium concentration could be recovered from the sample with 15 mol% P 2 O 5 addition (region B, Fig. 6).…”