Infrared and Raman spectroscopic studies of alkali bismuth borate glasses: Evidence of mixed alkali effect

Phenomenon of Eu3+ self-reduction induced by B2O3 configuration structure in sodiumborate glasses

“…It is identified that the vibration of B-O bonds stretching of the tetrahedral BO 4 units lies between 800 and 1200 cm À1 , and the range of 1200-1600 cm À1 is due to the asymmetric stretching relaxation of the B-O bands of triangles [BO 3 ] units. 13 Peak assignments are given accordingly with positions around 480, 720, 920, 1070, 1200, and 1400 cm À1 . Details can be referred as follows.…”

“…In Eu 3þ doped borate glasses, the interpretation of the abnormal reduction has been mostly controverted from the optical basicity view and charges compensation model, [10][11][12] it is regretful that little research expounded it beginning with the mechanism of the structure changes on the luminescence properties of the glass matrix. 13,14 Alkali (earth) borate glasses have been studied extensively over years to elucidate their structure, i.e., the nature and relative population of the borate units building the glass network. 15 The researchers concluded that addition of a network modifier in borate glasses could produce the conversion of the triangular [BO 3 ] structure units to negative charged [BO 4 ] tetrahedral units.…”

Anomalous elastic behaviour of xSrO-10PbO-(90-x)B2O3 glass system

“…The absorption band from 815 to 897 cm −1 and 1045 to 1120 cm −1 are attributed to the stretching vibrations of B\ \O bonds in BO 4 units from tri-, tetra-and penta-borate groups [24,30]. The bands around 1200-1253 cm −1 , 1316-1398 cm −1 and 1407-1503 cm −1 are assigned to the stretching vibrations of B\ \O \ \ bonds from BO 3 units from metaborate, pyroborate, and orthoborate groups [4,24,29,[31][32].…”

Structural analysis of mixed alkali borosilicate glasses containing Cs+ and Na+ using strong magnetic field magic angle spinning nuclear magnetic resonance

“…One of the causes of MAE is that during ion conduction the transfer energy between different kinds of alkali ions is much higher than that between the same kind. Many structural studies have been carried out in mixed alkali glasses to elucidate this phenomenon using methods such as small-angle X-ray scattering (SAXS) [5], extended X-ray absorption fine structure (EXAFS) [6], infrared [7], molecular dynamics simulation [8][9][10], Raman spectroscopies [11], and magic angle spinning nuclear magnetic resonance (MAS NMR) [12][13][14][15]. We have recently analyzed the local structure of alkali atoms in sodium cesium silicate [16] and borate [17] glasses with MAS NMR to understand the structural basis of MAE.…”