Ionic conductivity studies on Sr stabilized zirconia by impedance spectroscopy
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Sr stabilized zirconia has been prepared by the co-precipitation method and electrically characterized by using impedance spectroscopy in the frequency range from 42 Hz to 5 MHz. The charge carrier concentration of the material has been calculated from the conductance spectra and it is found to be of the order of 1025 cm−3. The conductance spectra show a dc plateau and a dispersive region suggesting correlated hopping motion of the ions. The impedance analysis shows a depressed semicircle indicating non-Debye nature of the material as well as the broad nature of modulus peaks indicates non-Debye behaviour. The bulk resistance of the material has been extracted from the impedance spectra and it is found to be 3.5×107 Ω·cm−1 at 673 K. The low frequency dispersion of the dielectric constant implies the space charge effects arising from the electrodes.
KeywordsZirconia Dielectric Constant Impedance Spectroscopy Renewable Energy Source Impedance Spectrum
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