Preparation and conductivity measurement of 7-8 mol % YSZ and 12 mol % CSZ for electrolyte SOFC

6th Asian Physics Symposium

Budiana, B.^1 ; Fitriana, F.^1 ; Ayu, N.^1 ; Suasmoro, S.^1

Physics Departement, Institut Teknologi Sepuluh Nopember, Surabaya

60111, Indonesia^1

关键词: Cole-Cole plots;    Commercial products;    Conductivity measurements;    SOFC electrolyte;    Solid state reaction method;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/739/1/012022/pdf
DOI  :  10.1088/1742-6596/739/1/012022

来源: IOP

【 摘 要 】

The study of 7YSZ (93% ZrO2-7%Y2O3), 8YSZ (92% ZrO2-8%Y2O3), and CSZ (88% ZrO2-12% CaO) as SOFC electrolytes have been carried out successfully. 7YSZ and 8YSZ powders were prepared by solid state reaction method of mixed Y2O3and ZrO2followed by calcination at 1350 °C for 1 hour, while CSZ was commercial products. Pellets of 7YSZ, 8YSZ, and CSZ were prepared by 1.2 gr, pressed at 40 MPa and sintered at 1550 °C for 4 hours. Rietveld refinement revealed that 7YSZ comprised 47.27% monoclinic, 52.65% cubic, and 0.008% Y2O3cubic, while 8YSZ comprised 48.45% monoclinic, 49.32% cubic, 2.23% Y2O3 cubic and CSZ has 88% ZrO2and 12% CaO. Ionic conductivity and activation energy were obtained from Cole- Cole Plot of impedance, the activation energy of 7YSZ=1.03eV, 8YSZ=0.96eV and CSZ=0.78eV.