Structural Characterization of Borate Glasses Containing Zinc and Manganese Oxides

Abstract

We have investigated the effect of inclusion of two transition metal ions (TMI) on structure and optical properties of borate glass system having composition <i>x</i>MnO<sub>2</sub> – <i>y</i>ZnO – (100 – <i>x</i> – <i>y</i>) B<sub>2</sub>O<sub>3</sub> (9 ≤ <i>x</i> ≤ 12, 36 ≤<i>y</i> ≤ 48) prepared by melt quenched route. Thermal study by using a differential scanning calorimeter (DSC) reveals that the glass transition temperature (Tg) and crystallization temperature (Tc) of the glasses increases with the increase of borate content in the system. Fourier transform infrared (FTIR) spectra indicate that inclusion of TMI produces BO<sub>3</sub> and BO<sub>4</sub> structural units by breaking the boroxol (B<sub>3</sub>O<sub>6</sub>) ring. The optical band gap energy estimated from ultraviolet-visible spectra shows a decreasing tendency when TMI are incorporated in the borate structure

Manganese modified structural and optical properties of bismuth silicate glasses

“…This may be attributed to increase in concentration of non-bridging oxygens (NBO's), which is evident from the results of Raman and FTIR spectra. The similar type of behaviour is observed in MnO 2 -ZnO-B 2 O 3 [31] glass system.…”

Synthesis and Optical Investigations on (Ba,Sr)TiO<sub>3</sub> Borosilicate Glasses Doped with La<sub>2</sub>O<sub>3</sub>

“…Wavenumber of different absorption peaks (cm −1 ) [27,28]. In these glass samples no absorption peak at 806 cm −1 was observed and it confirms the absence of boroxol ring in glassy network.…”

Synthesis and Optical Characterization of Silver Doped Sodium Borate Glasses

“…Pure borate glass is made up of random network of boroxyl units with boron in three-fold co-ordination (BO 3 ). The addition of modifier helps in forming BO 4 groups and non bridging oxygen, so increase of the non-bridging oxygen leads to open the network structure and the increase of durability [6,7]. The objective of this work is to through light into the optical characterization of silver ion doped sodium borate glasses by recording IR and UV-VIS spectra.…”