Flash-Sintering of Cubic Yttria-Stabilized Zirconia at 750℃ for Possible Use in SOFC Manufacturing

摘要

We show that cubic 8 mol% yttria (8YSZ) can be sintered at 750℃ with the application of DC electrical fields; in comparison the lowest sintering temperature for 3YSZ was 850℃. Furthermore, cubic zirconia exhibits the onset of flash sintering at 30 V/ cm, whereas 3YSZ begins flash sintering at 60 V/cm. However, the volume specific power dissipation for the onset of flash sintering remains similar at ～ 10 mW/mm~3. The easier sintering of 8YSZ is ascribed to its higher ionic conductivity.