Composites of 8 mol% Yttria-stabilized Zirconia (YSZ) containing 0, 7, 10 and 14 vol.% of graphene nano-platelets (GNP) were fully densified by Spark Plasma Sintering. The effect of GNP on the electrical performance of the composites was analyzed by impedance spectroscopy as a function of temperature (150–800 °C) and oxygen partial pressure (0.21–10⁻²⁰ atm). Results show that below GNP percolation threshold (7.1 vol.%), the electrical behavior is dominated by the matrix oxygen-ion conductivity. Above the threshold, the conductivity is predominantly electronic provided by the GNP network. The total conductivity of composites was used as an indicator of GNP stability in different atmospheres. YSZ/GNP composites remain stable in inert conditions up to 600 °C, and in reducing conditions up to 800 °C, making them good alternatives to perovskite-based materials used for electrochemical applications.

通过火花等离子体烧结将包含0、7、10和14体积％的石墨烯纳米片（GNP）的8摩尔％的氧化钇稳定的氧化锆（YSZ）的复合材料完全致密化。通过阻抗谱分析了温度（150–800°C）和氧分压（0.21–10 ^-20）的函数，分析了国民生产总值对复合材料电性能的影响。atm）。结果表明，低于GNP渗滤阈值（7.1％（体积）），电学行为主要由基质氧离子电导率决定。高于阈值时，电导率主要由GNP网络提供。复合材料的总电导率用作不同气氛下GNP稳定性的指标。YSZ / GNP复合材料在高达600°C的惰性条件下以及在高达800°C的还原条件下均保持稳定，使其成为用于电化学应用的钙钛矿基材料的理想替代品。