| Summary: | 碩士 === 國立臺北科技大學 === 材料科學與工程研究所 === 105 === In this study, we prepared intermediate temperature solid fuel cell (IT-SOFC) electrolyte by solid state reaction method. This study is divide two systems. The stoichiometric Ce0.8Sm0.15R0.05O1.875 (R = Mg, Ca, Sr, Ba) specimens sintered at different temperature, and Ce0.8Sm0.15R0.05O1.875 (R = Sm, Mg, Ca, Sr) - La0.85Sr0.15Ga0.8Mg0.2O3-δ composite electrolytes sintered at different temperature. the two systems had studied correlations between sintered temperature and properties by XRD, SEM, TMA, Raman and conductivity
The results showed that MgO and BaCeO3 were produced from SMDC-1550 and SBDC-1550 specimens by SEM. The composite electrolytes were not observed LSGM phase by XRD, and EDS analysis detects a small amount of La, Sr, Ga element in the grain. The conductivity of 95S05L-1450 and SCDC-1550 specimens were higher, approximately 0.049 S/cm and 0.061 S/cm at 800°C in the air. The power density of 95S05L-1450 is 245 mW/cm2 at 800°C，and the OCV is 0.73 V at 800°C.
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