PREPARATION AND THERMOELECTRICITY OF TIO2/V2O5 POWDERS

TiO2/V2O5 powders were prepared by the mixed oxide and sol gel method. The sols were dried using different procedures. The obtained powders were characterized by X-ray diffraction, scanning electron microscopy, BET-adsorption and laser granulometry. The electric properties were determined by measuring the thermoelectric power. A strict correlation of the thermoelectric power and the V2O5 content could be observed, but by contrast to conductivity measurements, the thermoelectric power was not influenced by the powder morphology. Additionally, the thermoelectric power was drastically influenced by the calcination temperature.