▎ 摘　　要

Al2O3/graphene nanocomposites with graphene contents of 1 and 2 wt % were obtained by the SPS method and were characterized by means of electron microscopy and Raman spectroscopy. The aim of this work was to study the effect of graphene content on the temperature and frequency dependences of the electrical resistivity in nanocomposite ceramics. Using the impedance method with alternating current, the ceramic materials were studied over a wide temperature range, 23-530 degrees C and over a frequency range of 10(-1) - 10(6) Hz. More than a half decrease in the porosity of the sintered composite with an increase in the graphene content was observed. Raman spectroscopy indicated the absence of graphene degradation during the SPS. The range of frequencies (10(6)-10(3) Hz) and temperatures (23-130 degrees C) in which the dielectric can exhibit electron or ionic conductivity were determined.