| Pressure-induced improvement of grain boundary properties in yttrium-doped bazro3 | |
| Wu, Lei1; Dai, LiDong1; Li, HePing1; Zhuang, Yukai1,2; Liu, KaiXiang1,2 | |
| 刊名 | Journal of physics d-applied physics
 |
| 2016-09-01 | |
| 卷号 | 49期号:34页码:8 |
| 关键词 | Yttrium-doped High pressure Impedance spectroscopy Conductivity |
| ISSN号 | 0022-3727 |
| DOI | 10.1088/0022-3727/49/34/345102 |
| 通讯作者 | Dai, lidong(dailidong_2014@hotmail.com) |
| 英文摘要 | Yttrium-doped bazro3 (bzy) is a promising electrolyte for intermediate-temperature protonic ceramic fuel cells. however, bzy exhibits a high resistance because of the blocking effect of the grain boundaries. in this study, the effect of pressure on undoped and 5% yttrium-doped bazro3 (bzy0 and bzy5) were investigated at 0.45-24.01 gpa and 273-673 k with a diamond anvil cell. their bulk, grain boundary, and total electrical conductivities were determined by impedance spectroscopy and direct-current resistance measurement. both samples tended to show increasing electrical conductivity with increasing pressure, although each showed a discontinuous inflexion point (at similar to 14.54 gpa for bzy0 and at similar to 11.11 gpa for bzy5) indicating a phase transition from a cubic to a tetragonal structure. the samples showed a 3.43 gpa difference in the onset pressure of the structure change. characteristic parameters, including space charge potential, relaxation frequency, and transport activation energy, were obtained before and after the phase transition. the results suggest that pressure significantly improves oxygen ion conduction in acceptor-doped perovskites oxides. |
| WOS关键词 | SHORT-RANGE STRUCTURE ; PROTON CONDUCTION ; BARIUM ZIRCONATE ; IONIC-CONDUCTIVITY ; FUEL-CELLS ; OXIDES ; METALLIZATION ; ELECTROLYTE ; INTERFACES ; DYNAMICS |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Applied |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000384048800005 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2376005 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Dai, LiDong |
| 作者单位 | 1.Chinese Acad Sci, Inst Geochem, Key Lab High Temp & High Pressure Study Earths In, Guiyang 550002, Guizhou, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Lei,Dai, LiDong,Li, HePing,et al. Pressure-induced improvement of grain boundary properties in yttrium-doped bazro3[J]. Journal of physics d-applied physics,2016,49(34):8. |
| APA | Wu, Lei,Dai, LiDong,Li, HePing,Zhuang, Yukai,&Liu, KaiXiang.(2016).Pressure-induced improvement of grain boundary properties in yttrium-doped bazro3.Journal of physics d-applied physics,49(34),8. |
| MLA | Wu, Lei,et al."Pressure-induced improvement of grain boundary properties in yttrium-doped bazro3".Journal of physics d-applied physics 49.34(2016):8. |
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