کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1529714 | 995768 | 2011 | 6 صفحه PDF | دانلود رایگان |
The effects of ZnO additive on the phase formation, microstructure and electrical conduction of Y-doped BaSnO3 have been investigated. The single-phase and dense BaSn0.75Y0.25O3−δ compound with 4 mol% ZnO additive was successfully prepared after sintering at 1300 °C, which significantly reduces the sintering temperature. The conductivities measured under dry and wet air atmospheres reveal that the bulk conductivity of BaSn0.71Y0.25Zn0.04O3−δ is much lower than that of BaSn0.75Y0.25O3−δ. However, ZnO as a sintering aid does not affect the bulk conductivity. The total conductivity of BaSn0.75Y0.25O3−δ with ZnO as the sintering aid is slightly higher than that of unmodified BaSn0.75Y0.25O3−δ, and reaches 2.4 × 10−3 S cm−1 at 621 °C. Therefore, this material can be used as a proton-conducting electrolyte for intermediate temperature solid oxide fuel cells.
► Dense BaSn0.75Y0.25O3−δ ceramics are prepared at 1300 °C with ZnO additive.
► ZnO as a sintering aid does not affect the bulk conductivity.
► The total conductivity BaSn0.75Y0.25O3−δ with ZnO additive is 2.4 × 10−3 S cm−1 at 621 ̊°C.
Journal: Materials Science and Engineering: B - Volume 176, Issue 15, 15 September 2011, Pages 1178–1183