کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1296047 | 1498251 | 2016 | 5 صفحه PDF | دانلود رایگان |
• The 10Sc1CeSZ was synthesized by the hydrothermal method.
• Controlling the concentration of the urea can obtain the cubic 10Sc1CeSZ phase.
• The impedance spectra measured at 300 °C, the grain boundary resistance reduces with the increase of sintering temperature.
• 10Sc1CeSZ block sintered at 1450 °C for 4 h showed the highest total ionic conductivity of 0.137 S cm− 1 at 800 °C.
The cubic 10Sc1CeSZ (10 mol% Sc2O3–1 mol% CeO2–89 mol% ZrO2) was prepared by controlling the concentration of the urea varied from 0.4 to 0.6 mol/L in the hydrothermal process. XRD results depict that the 10Sc1CeSZ blocks have a stable cubic phase structure at room temperature after sintering at 1150–1450 °C. SEM characterization of the fracture surface of the 10Sc1CeSZ blocks shows that the grain size increases from 0.3 to 8 μm during heat treatment up to 1150–1450 °C, correspondingly, the relative densities increase from 98.3% to 99.7%. The impedance spectra measured at 300 °C reveal that the grain boundary resistance reduces with the increase of sintering temperature. Impedance analysis results show that the 10Sc1CeSZ block sintered at 1450 °C for 4 h has the highest total ionic conductivity of 0.137 S cm− 1 at 800 °C.
Journal: Solid State Ionics - Volume 292, September 2016, Pages 22–26