A CONDUCTIVITY AND THERMAL GRAVIMETRIC ANALYSIS OF A Y-DOPED SRZRO3 SINGLE-CRYSTAL

From impedance spectroscopy combined with thermal gravimetric analysis (TGA), the conductivity properties and the defect chemistry of a nomi nally 5 mol% Y-doped SrZrO3 single crystal are derived. in the tempera ture range from 60 to 740 degrees C, in which the charge carrier conce ntrations are frozen-in, proton, hole and oxygen vacancy conductivity with migration energies of 0.47 eV, 0.84 eV and 1.0 eV dominate in dif ferent atmospheres. The proton concentration is determined consistentl y from the water incorporation measured by TGA and conductivity data y ielding a saturation concentration of 0.08 mol%.