Structure of lithium borosilicate glass containing two different transition metals

IR, density and DTA studies the effect of replacing Pb3O4 by CuO in pseudo-binary Li2B4O7–Pb3O4 glass system

“…The band appears at 680 cm −1 is attributed to the B-O-B bond-bending vibrations from pentaborate groups [28,29], the band at 885 cm −1 is due to pentaborate units [30], 950 cm −1 due to vibrations of structural groups containing BO 4 tetrahedra (orthoborate units) [27], also 950 cm −1 attributed to Pb-O bonds [20,31]. The band at 1336 cm −1 is due to B-O stretching BO 4 vibrations with one or two non-bridging oxygen atoms [32] and that at 1400 cm −1 assigned to BO 3 units with one non-bridging oxygen [8,21,33,34].…”

Structural studies of some V2O5-P2O5-B2O3-Fe2O3 glass systems

“…The band at 850 cm -1 is assigned to the V-O-V stretching modes [29], whilst that at 555 cm-1 is due to the Fe20 4 group [20], and that at 450 crn-1 is due to V-O and P-O bending modes [14]. A new band at 1620 cm-1 due to P4Olo group vibration [29], one at 1415 cm -1 which is due to vibration of boroxol rings [28], and a shoulder at 910 cm-1 which is due to nonbridging oxygens of the VO2 group vibration [29], were observed when the sample was heat treated for 6 h. The infrared spectrum of the,sample heat treated for 12 h shows new bands at 1445, 675, 410, 385 and 360 cm -1, and some bands shifted to higher frec~uencies. The band at 1445 cm-1 is due to ~B-O-B-vibration [30].…”

“…The infrared spectra of the heat-treated samples containing 2.5 tool % Fe203, show some new bands: one at 1460 cm-1, which is due to boron tetrahedra [9], and one at 840 cm-1, which is due to B-O-B nonbridging vibration [28]. The band at 985 cm-1, is due to symmetric and antisymmetric stretching vibration of isolated nonbridging oxygens of the VOz group in the VO4 polyhedra [29].…”

Structure and physical properties of sodium borate glasses containing nickel oxide

“…The band at 926 cm -1 may be due to B O linkages in BO 4 groups [16], while that at 1030 cm 1 is due to BO 4 groups [17]. The band observed at 1086 cm-1 is assigned to B-O linkages of BO 4 groups [18] and the one at 1336 cm -1 is due to B-O stretching BO4 vibrations with one or two non-bridging oxygen atoms [19]. The addition of NiO with different concentrations caused a new band to appear at 1205 cm-1 for a sample containing 1 g NiO, which is due to B-O stretching in the bridging BO3 group (10,20,21), and the new band at 1305 cm-1 for the sample containing 2 g NiO is due to the B-O band in BO4 or BO3 and non-bridging oxygen (22).…”