DSC, ESR AND IR SPECTRAL STUDIES ON Li2O-WO3-B2O3 GLASS SYSTEM DOPED WITH VANADIUM IONS

作者：Rao Linganaboina Srinivasa^*; Rao Tumu Venkatappa

来源：Functional Materials Letters, 2009, 2(3): 127-130.

DOI：10.1142/S1793604709000661

• Glasses
• differential scanning calorimetry
• electron spin resonance and infrared spectra

With in glass forming region of Li2O-WO3-B2O3 glass system, a particular composition 40Li(2)O-5WO(3)-(55-x)B2O3:xV(2)O(5) (with x ranging from 0.2 to 0.8, all are in mol.%) is chosen. The DSC traces are obtained to identify the glass transition temperature (T-g) and the glass forming ability of all the glass samples. The ESR and IR spectra portray the local structure of the glass system and valance states of the vanadium ions in the glass matrix. As the content of V2O5 increases up to 0.6 mol.% in the glass system, a gradual conversion of vanadium ions from V5+ state to V4+ state is observed, causing the depolymerization in the glass matrix by the transformation of several glass forming units BO4 -> BO3 and WO4 -> WO6.

• 出版日期2009-9