Ionic transport in zirconia-based single crystals
The main purpose of this work is to study transport properties of single crystals based on zirconium dioxide and it's dependence on the concentration of the stabilizer. For convenience, researches are carried out on single crystals, as ceramics have the grain boundaries, which, in turn, have characteristics distinguish from the bulk, as well as it have an affect on the measurment stability. Thus, the results of measurements of physical characteristics such as electrical conductivity, are related only to the volume of material and eliminate the influence of the grain boundaries, which significantly facilitate selection of composition and help evaluate the quality of products made of ceramic materials used in SOFC.
In this work conductivity of monocrystals of partially stabilized zirconia (PSZ) Zr (1-x-y) Sc (y) Y (x) O (2-z) is measured by impedance spectroscopy.The temperature dependence of bulk conductivities is constructed. The influence of overall concentration of dopants and the concentration of Y2O3 and Sc2O3 separately on the conductivity of single crystal is determin.