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The effect of Al2O3 doping on the microstructure and electrical properties of the ZnO-Pr6O11-Co3O4-MnCO3-Y2O3 system was investigated in the range of 0.0–0.1mol%. The results reveal that Al2O3 doping has slight influence on the densification process. The microstructure of the ceramics comprises of ZnO phase, ZnAl2O4 spine phase and Pr-rich phases. The addition of Al2O3 greatly affects the electrical...
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