為了改善BaCe0.8-xZrxDy0.2O3-δ材料系統的熱穩定性，本研究以化學法合成SrCe0.8-xZrxDy0.2O3-δ (x=0.1-0.4) 和BaCe0.5M0.3Dy0.2O3-δ (M = Ti, Sn, Hf, Zr)，分析其成分對導電率與熱穩定性的影響。實驗結果發現導電度與晶格常數和結構對稱性成正相關；熱穩定性則隨著結構對稱性和摻雜離子的電負度 (Electronegativity) 增加而提高，且不同成分的相對穩定性與熱力學估算的趨勢接近。BaCe0.5Sn0.3Dy0.2O3-δ在本實驗的所有成分中對二氧化碳和水具有最佳的熱穩定性，兼具不錯的導電度。進一步探討其缺陷化學，發現導電度與氧分壓的1/4次方有線性關係，與實驗結果相符。由離子與電洞遷移數得知，BaCe0.5Sn0.3Dy0.2O3-δ在低氧分壓下為純離子導體，在高氧分壓下則為離子與電洞的混合導體，有潛力做為IT-SOFC的陽極、電解質和陰極材料。

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