Hussien Ahmed Abbas, Fadwa Fouad Hammad, Zeinab Mohamed Hanafi and Ibrahim El Anwar
Keywords: Co-doped scandia stabilized zirconia, ceria stabilized zirconia, electrical properties, dielectric properties.
Abstract: Scandia stabilized zirconia sample, containing 1mole % CeO2, (1Ce9Sc sample) was prepared by using chemical polymeric precursor route called pichini method. Two zirconia samples doped with 10 and 15 mole % CeO2 (10Ce and 15Ce samples) were prepared by using the same method for comparison. Co-doping zirconia with 1 mole % of CeO2 and 9 mole % of Sc2O3 suppressed the undesired rhombohedral phase and fully stabilized this sample in the cubic phase. Addition of 15 mole % of CeO2 fully stabilized zirconia in the tetragonal phase. The dielectric and electrical properties of all the prepared samples were investigated in the frequency range from 10 kHz to 5MHz in the temperature range from 25°C to about 325°C. At temperature range from 125 to 325°C, 1Ce9Sc sample has the highest conductivity. For all the prepared samples, as the frequency increases both the dielectric constant and dielectric loss decreases.
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