Electrical and Spectroscopic Studies of the CdO Substituted Lead Vanadate Glass System vs Crystalline Form

Abstract

Results of the direct current (DC) Electrical Conductivity, thermoelectric power and Electron Spin Resonance (ESR) of CdO substituted PbO-V 2 O 5 glass system are reported. Conduction in these glasses is found to be electronic and the hoping of polaron seems to be the dominant process in the transport mechanism. There is a remarkable decrease in the activation energy for conduction in the annealed and devitrified samples when compared to their amorphous counter parts. It is observed that there is remarkable improvement in the conductivity of the crystalline samples when compared to their amorphous counter parts. The thermoelectric power measurements indicates that the amorphous samples are n-type at room temperature where as the crystalline samples are p-type at room temperature. In crystalline samples the hyperfine structure is nearly smeared out and a relatively broad line with an isotropic g value characterizes the spectra.

Dc electrical properties of semiconducting cobalt oxide substituted lead vanadate glasses

“…The chemical analysis data is given in table 1. The DTA patterns of these glass systems are shown in figure 2, and are slightly different when compared to those of the unsubstituted system [9]. Values of glass transition temperature Tg, crystallization temperature TC, and melting temperature for the xCoO (50-x) PbO-50V2O5 glass systems are given in table 2.…”

Thermal and FT-IR Properties of Semiconducting SnO<SUB>2</SUB>-PbO-V<SUB>2</SUB>O<SUB>5</SUB> Glass System

“…This band is observed at 966 cm −1 in 5SnO 2 :45PbO:50V 2 O 5 system. As SnO 2 concentration is increased to 10 mol% and 15 mole%, the appearance of 1023 cm −1 band indicates that SnO 2 is replacing PbO in such a way that the V=O bond in the glass network of the eutectic composition is elongated [8].…”

Thermoelectric Properties of ZnO-P<sub>2</sub>O<sub>5</sub>/(Ni) Composites

“…The Seebeck coefficient value varied between minimal value 265 and maximal value 670 (µV/K), that indicated the matrix is p-type. These values are compared with that obtained in xCdO:(50-x)PbO:50V 2 O 5 [17]. Indeed, from the Equation (4), the plot of thermoelectric power (S) as a function of temperature (1/T) shows two region of temperature (Figure 4(b)).…”