Investigations of Electrical Properties of Titania Ceramic

TiO2 is one of the most widely used metal oxides because of it’s excellent chemical stability in hazardous environments, hardness, high refractive index, and many other remarkable features. Electrical properties of ceramics are affected by their microstructural features and defect structures (such as oxygen vacancies and titanium interstitials). With increasing oxygen deficit, the electrical conductivity increases strongly. The defect structure and related properties of TiO2 are usually deduced from electrical conductivity measurements, assuming that the studied material is an electronic semiconductor . The present work determinate electrical resistance of vacuum treated titania ceramic and deviation from stoichiometry. TiO2 ceramic specimens were prepared from plastic TiO2 ceramic mass by extrusion. The influence of different thermal treatment conditions on phase composition, density, microstructure, and electrical conductivity of obtained TiO2 ceramic was evaluated by the following analytical techniques: water displacement method, X-ray diffraction, thermogravimetry, scanning electron microscopy, impedance spectroscopy and DC four-probe measurements