FTIR, Raman, and UV-Vis spectroscopic and DFT investigations of the structure of iron–lead–tellurate glasses

Abstract

In this paper, we have analyzed the effects of iron ions intercalations on lead-tellurate glasses content up to 60mol%, the accommodation of the network with excess of oxygen can be

Effects of Fe2O3 replacement of ZnO on elastic and structural properties of 80TeO2–(20−x)ZnO–xFe2O3 tellurite glass system

“…The peak was not present for the Fe 2 O 3 -free sample (x = 0 mol%) but the intensity of the peak increases with Fe 2 O 3 . The band at 565-579 cm − 1 and 658 cm − 1 is assigned to the TeO 4 trigonal bipyramid (tbp) [38,39] while the band at 750 cm − 1 is assigned to the TeO 3 trigonal pyramid (tp) group [37][38][39]. The intensity for the TeO 4 assigned peaks increased with increasing Fe 2 O 3 while the 565-579 cm − 1 band shifted to higher wavenumbers.…”

“…at 451, 565-579, 658 and 750 cm − 1 . The 451 cm − 1 IR peak is assigned to the FeO 6 octahedral group [37,38]. The peak was not present for the Fe 2 O 3 -free sample (x = 0 mol%) but the intensity of the peak increases with Fe 2 O 3 .…”

Mechanism of hopping conduction in Be–Fe–Al–Te–O semiconducting glasses and glass–ceramics

“…This is a confirmation of increasing tellurite network polymerization as observed by Raman spectroscopy. The small envelope at * 463 cm -1 can be correlated with the presence of the modifier Fe ions which in the tellurite network would probably form FeO 6 octahedral units [37]. Finally, the broad and weak envelop at 310 cm -1 is mainly due to stretching-bending vibrations of O-Te-O and Te-O-Te bonding in various tellurite configurations [35].…”

Role of vanadium ions on structural, optical and electrochemical properties of the vanadate-lead glasses

“…Lead is known to play various structural roles in glasses depending upon the glass-forming systems and their compositions [6][7][8][9][10]. Structural roles of lead in vanadato-lead glasses are particularly interesting because lead is not considered to be a conventional glass former.…”