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Impedance spectroscopy measurements were carried out in the 10Hz to 10MHz frequency range from 500 to 1200°C in LaAl 11 O 18 pellets sintered at 1600°C. The powders were obtained by the polymeric precursor technique. The sintered pellets were nearly single phase LaAl 11 O 18 . The bulk electrical resistivity was evaluated from the [−Z″(ω)×Z′(ω)] impedance diagrams....
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