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Stabilized β- and β″-ferrites have been investigated for their remarkable conductivity properties. These materials are isostructural to β- and β″-aluminas. A high ionic conductivity is observed. Impedance spectroscopic investigations reveal several temperature- and humidity-dependent transport processes in the materials, which show Arrhenius-type behavior above 100 °C. The determined pre-exponential...
The ionic conductivity of Mg2+-stabilized potassium β-ferrites was studied in wet and dry air atmosphere and in the temperature range between room temperature and 500 °C. Several conductivity processes were determined. The impedance spectroscopic measurements were combined with thermogravimetric analysis data, and a microscopic interpretation for the effect of humidity on the conductivity of K+-β-ferrite...
The effect of humidity on the conductivity of Cu 2+ -stabilised K + -β''-ferrite was investigated by impedance spectroscopy. Several conductivity processes could be determined in the temperature range between 20 and 500 o C in humidified atmospheres with water partial pressures between 26 and 2510 Pa. Bulk conductivity, conductivity through grain boundaries and electrode...
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