Defect Structure and Electrical Properties of Some Refractory Metal Oxides
A brief description of the equilibrium thermodynamic approach to the characterization of defect concentrations in refractory metal oxides as a function of temperature, oxygen partial pressure, and impurity content is given. Techniques for the determination of ionic and electronic transport numbers by a blocking electrode polarization measurement and for the measurement of conductivity, thermoelectric power, and weight change are reviewed. The application of this approach and these measurements to the determination of the extent of deviation from stoichiometry, the nature and ionization state of the defects which predominate, and the mechanism of charge transport are illustrated by detailed consideration of several specific examples.
KeywordsDefect Structure Oxygen Partial Pressure Oxygen Pressure Thermoelectric Power Defect Concentration
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