Structural, electrical and optical properties of TiO2–WO3 polycrystalline ceramics

Mixed oxides from the TiO{sub 2}-WO{sub 3} system were prepared as polycrystalline materials. Their phase composition and electrical conductivity were investigated using X-ray diffraction (XRD) and dc electrical measurements. The energy gap, evaluated on the basis of optical measurements, was presented as a function of W concentration. The influence of chemical composition on structural, semiconducting and optical properties of the TiO{sub 2}-WO{sub 3} polycrystalline ceramics was discussed.