Abstract In this study, (Bi 2 O 3 ) 1-x-y (Tb 4 O 7 ) x (Gd 2 O 3 ) y (xTbyGdSBi) ternary solid solutions were synthesized via the solid-state synthesis technique. The phase structures of electrolytes were defined by X-ray powder diffraction (XRD) and differential thermal analysis/thermal gravimetric techniques (DTA/TG). The total electrical conductivity (σ T ) was measured with respect to the test temperature and doping concentration by using four-point probe technique (4PPT). Measurement results showed that δ-phase was obtained in test specimens and the conductivity of the electrolytes increased with increasing test temperature and decreasing amount of Gd 2 O 3. The 5Tb5GdSBi ternary system had the highest conductivity value of 3.88 × 10 −1 S cm −1 at 850 °C. Compared to the literature, the results from this study are reasonably promising.

中文翻译：

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用于 SOFC 应用的 (Bi 2 O 3 ) 1-xy (Tb 4 O 7 ) x (Gd 2 O 3 ) y 电解质的晶体学、热学和电学特性研究

摘要 本研究采用固态合成技术合成了(Bi 2 O 3 ) 1-xy (Tb 4 O 7 ) x (Gd 2 O 3 ) y (xTbyGdSBi)三元固溶体。电解质的相结构由 X 射线粉末衍射 (XRD) 和差热分析/热重技术 (DTA/TG) 定义。通过使用四点探针技术 (4PPT) 测量相对于测试温度和掺杂浓度的总电导率 (σ T )。测量结果表明，在试样中获得δ相，电解液的电导率随着测试温度的升高和Gd 2 O 3 量的减少而增加。5Tb5GdSBi三元体系的电导率最高，为3.88 × 10 -1 S cm - 1 在 850 °C。与文献相比，这项研究的结果相当有希望。