Study of crystallographic, thermal and electrical properties of (Bi2O3)1-x-y(Tb4O7)x(Gd2O3)y electrolyte for SOFC application
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Tarih
2018
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Sci Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, (Bi2O3)(1-x-y)(Tb4O7)(x)(Gd2O3)(y) (xTbyGdSBi) ternary solid solutions were synthesized via the solidstate 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 (sigma(T)) was measured with respect to the test temperature and doping concentration by using four-point probe technique (4PPT). Measurement results showed that 8-phase was obtained in test specimens and the conductivity of the electrolytes increased with increasing test temperature and decreasing amount of Gd203. The 5Tb5GdSBi ternary system had the highest conductivity value of 3.88 x 10(-1) S cm(-1) at 850 degrees C. Compared to the literature, the results from this study are reasonably promising.
Açıklama
Anahtar Kelimeler
Fuel cell, Solid electrolyte, Bismuth oxide, Doping, Ionic conductivities, Phase structure, SOFC
Kaynak
Ceramics International
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
44
Sayı
15
