Infrared reflectance spectra of lithium borate glasses

A Review on Infrared Spectroscopy of Borate Glasses with Effects of Different Additives

“…The band around 1292 cm −1 is due to B-O asymmetric stretching of BO 3 unit [125], and bands around 1234 cm −1 was arisen by B-O stretching vibrations of (BO 3 ) 3− unit in metaborate chains and orthoborates [126]. Vibrations of some boron atoms attached to nonbridging oxygen in the form of BO 4 vibration were assigned band at 1004 cm −1 [36]. The formation of diborate group in present glasses had been represented by absorption around 1000 cm −1 .…”

“…IR spectra of these glasses show a band in the range of 400-1600 cm −1 . The band in the wavenumber range of 400-780 cm −1 was formed due to the bending vibrations of various borate arrangements, vibrations of Li cations through glass network, and deformation modes of network structures as well as vibrations of some MnO 4 groups [36,54,139,140]. The spectral band in the region 780-1100 cm −1 is due to the B-O asymmetric stretching of tetrahedral BO 4 units and vibrations of diborates bridging to pentaborate groups; while the dominating transmission bands in the range of 1100-1600 cm −1 were assigned due to the stretching vibrations of borate units in which boron atoms are connected to the three oxygens (BO 3 and B 3 O 6 units) [141,142].…”

Gamma Rays Interactions with Strontium Borate Glasses Doped with First-Row Transition Metal Oxides

“…Infrared spectroscopic technique has proven to be a powerful tool to investigate the basic structural units involved within the network constitution of glasses [28]. Borate glasses in particular, have been the subject of numerous infrared studies, due to their interesting and peculiar structures as evidenced through some valuable articles [29][30][31]. Borate glasses provide a different system in comparison to other glass-forming system to demonstrate the effectiveness of infrared spectroscopic analysis in glass science.…”

“…Extensive infrared studies on all borate glasses indicate that the stretching vibrations of tetrahedral borate units are active in the wavenumber range 800-1200 cm -1 while the high frequency absorption at 1250-1600 cm -1 exhibits the modes of boron -oxygen triangular units (BO 3 and BO 2 O -). The low-frequency region of the mid region at 500-800 cm -1 is dominated by the bending vibrations or deformation modes of various borate units [7,[29][30][31].…”

“…Infrared spectra of glasses and crystalline analogs have been used as a basis for the comparative qualitative identification of glass-forming structural units [7,[28][29][30][31][32]. Due to structural non-periodicity within glasses in the group arrangement, a complete vibrational analysis in glasses is not completely reached from ab initio point of view and an analysis is done primarily by comparing the IR spectra of these glasses with those of corresponding crystalline analogs for which the structure is completely known.…”