Effect Of Mn2+On Physical And Spectroscopic Features Of Li2B4O7 And K2B4O7Glasses With Teo2

The present manuscript is to provide information about the preparation, and identification of the glassy nature, primary physical parameters, and structural studies of the effect of Mn2+ on K2B4O7 -TeO2 and Li2B4O7-TeO2 MnO[LTM] glasses. The glasses of thickness around 1 mm were obtained by the melt quenching method. These glasses are transparent enough to recognize them as glassy species but their amorphous nature was scientifically identified with peak-free XRD spectra. Several properties like density, molar volume, optical absorption, FTIR, Raman, and EPR spectra were measured and analysed, and discussed in detail. Density drastically decreased from 2.5176 gm/cc (LTM) to 2.3868 gm/cc (KTM) which is due to the presence of K2B4O7. Molar volume increased from 66.27 (LTM) to 115.61 (KTM) glass sample. From Optical absorption spectra, optical band gap energy decreased from 3.278 eV (LTM) to 2.888 eV (KTM) and the refractive index increased. FTIR and Raman studies combined reveal the existence of certain structural groups and the domination of a few borate modes. EPR studies confirmed the presence of Mn2+ ions