Abstract
The aim of this study is the preparation and characterization of dense cubic zirconia ceramics and zirconia nanocomposites (reinforced with 5wt% alumina). The powders were obtained through sol–gel methods and densified using classical sintering and spark plasma sintering (SPS) methods. The obtained ceramics were characterized through X-ray diffraction, scanning electron microscopy and impedance spectroscopy at room and high temperature. The average grain size of cubic zirconia particles was found to be approximately 8 and 2.5μm for the classical sintering and 99nm for SPS. The alumina particles in composites have an average grain size of 0.7μm for classical sintering and 53nm for SPS ones. The total conductivity for nanocomposites sintered through both methods was also determined.
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