DSC, Raman and impedance spectroscopy studies on the xB(2)O(3)-(90-x)TeO2-10TiO(2) (where x=0 to 50 mol%) glass system

作者：Sripada Suresh^*; Rani D Esther Kalpana; Upender G; Pavani P Gayathri

来源：Journal of the Korean Physical Society, 2013, 62(5): 762-769.

DOI：10.3938/jkps.62.762

• Ionic conduction
• Infrared and Raman spectra
• Glasses
• Non-electronic transport properties

Titanium boro tellurite glasses in the xB(2)O(3) (-)(90-x) TeO2 - 10TiO(2) (where x = 0 to 50 mol%) system were prepared by using the conventional melt-quenching technique. Glass transition temperatures were measured with differential scanning calorimetry (DSC) and found to be in the range of 300-370 A degrees C. The Raman spectra showed a cleavage of the continuous TeO4 (tbp) network by breaking of the Te-O-Te linkages. The relative transition of TeO4 (-) groups to TeO3 (-) groups is accompanied by a change in the oxygen coordination of the boron from 3 to 4 (BO3 (-) to BO4 (-)). The impedance plots ZaEuro(3)(omega) versus Z'(omega) for all the glass samples were recorded and found to exhibit a single circle. The AC conductivity of all glass samples was studied in the frequency range from 100 Hz to 1 MHz and in the temperature range from room temperature (RT) to 375 A degrees C. The AC conductivity decreased by about one order in magnitude with increasing B2O3 content. The conductivity was found to be on the order of 10(-4.5) to 10(-6) (Omega cm)(-1) at 375 A degrees C and 1 MHz for 10 mol% and 50 mol% B2O3 contents, respectively. The relaxation behavior in these glass samples is discussed based on the complex modulus and impedance data.

• 出版日期2013-3