| Abstract: | (Nd1–xGdx)2(Ce1–xZrx)2O7 (0 ≤ x ≤ 0.5) ceramic powders synthesised by the chemical‐coprecipitation and calcination method were pressureless‐sintered at 1,973 K for 10 h in air. The structure and electrical conductivity of (Nd1–xGdx)2(Ce1–xZrx)2O7 ceramics were investigated by the X‐ray diffraction and impedance spectroscopy measurements. (Nd1–xGdx)2(Ce1–xZrx)2O7 (0 ≤ x ≤ 0.5) ceramics exhibit a single phase of defect fluorite‐type structure. The electrical conductivity of (Nd1–xGdx)2(Ce1–xZrx)2O7 ceramics increases with temperature in the range 623–1,173 K following an Arrhenius law. At identical temperature levels, the measured electrical conductivity of (Nd1–xGdx)2(Ce1–xZrx)2O7 ceramics varies with doping different Gd2O3 and ZrO2 contents and exhibits a maximum at x = 0.1. |
