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- W2022728210 abstract "(1−x) Ce0.8Gd0.2O2−δ+x Al2O3 ceramics with compositions x=0 to 0.2 were prepared by the conventional mixed-oxide method from high purity (>99.9%) of commercial powders, and sintered at 1550 °C for 5 h in air. Sintered density, crystal phase, and microstructure were characterized. The ionic conductivity was measured over 200 to 800 °C in air using an impedance analyzer in the frequency range of 0.001 to 100 Hz. Microhardness and indentation fracture toughness were also determined. A new phase (i.e., GdAlO3) has been detected in the samples with Al content greater than 5% AlO1.5. Ce0.8Gd0.2O2−δ ceramic has a Vickers hardness of ∼9.23±0.15 GPa, and an indentation fracture toughness of ∼1.47±0.2 MPa m1/2. A remarkable improvement in both fracture toughness and microhardness can be observed for the samples with over 10% AlO1.5. However, the addition of Al2O3 exhibits a detrimental effect on the conductivities, especially on grain boundary conductivity, which is possibly related to the formation of GdAlO3." @default.
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- W2022728210 date "2002-11-01" @default.
- W2022728210 modified "2023-10-18" @default.
- W2022728210 title "Effect of alumina addition on the electrical and mechanical properties of Ce0.8Gd0.2O2−δ ceramics" @default.
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- W2022728210 doi "https://doi.org/10.1016/s0167-577x(02)00717-6" @default.
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