Evaluation of electrical conductivity and oxygen diffusivity of the typical Ruddlesden-Popper oxide Sr3Fe2O7-δ

被引：24

作者：

Ling, Yihan ^{[1
,2
]}

Guo, Tianmin ^{[1
]}

Zhang, Xiaozhen ^{[3
]}

Budiman, Riyan Achmad ^{[4
]}

Fujimaki, Yoshinobu ^{[2
]}

Nakamura, Takashi ^{[2
]}

Lin, Bin ^{[5
]}

Kawada, Tatsuya ^{[4
]}

Amezawa, Koji ^{[2
]}

机构：

[1] China Univ Min & Technol, Sch Mat Sci & Engn, Xuzhou 221116, Peoples R China

[2] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, 2-1-1,Katahira, Sendai, Miyagi 9808577, Japan

[3] Jingdezhen Ceram Inst, Sch Mat Sci & Engn, Jiangxi Univ Inorgan Membranes, Key Lab, Jingdezhen 333001, Peoples R China

[4] Tohoku Univ, Grad Sch Environm Studies, Aoba Ku, 6-6-01 Aoba, Sendai, Miyagi 9808579, Japan

[5] Univ Elect Sci & Technol China, Sch Energy Sci & Engn, Chengdu 611731, Sichuan, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2017年 / 43卷 / 18期

基金：

中国博士后科学基金; 中国国家自然科学基金; 日本学术振兴会;

关键词：

Ruddlesden-Popper oxide; Electrical conductivity; Oxygen diffusivity; Electrical conductivity relaxation; Pulse isotope O-18-O-16 exchange; PR2NIO4-BASED MIXED CONDUCTOR; CERAMIC FUEL-CELLS; HIGH-PERFORMANCE; THERMODYNAMIC QUANTITIES; CATHODE; TRANSPORT; NONSTOICHIOMETRY; PEROVSKITE; EXCHANGE;

D O I：

10.1016/j.ceramint.2017.08.211

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The electrical conductivity (sigma) and oxygen diffusivity of the typical Ruddlesden-Popper oxide Sr3Fe2O7-delta were investigated with the variation of oxygen partial pressure, P(O-2), and temperatures, and thus the results were discussed based on its defect structure. The a increases with the increase of P(O-2) and a positive slope of log sigma depend on P(O-2) is close to 1/4 with the small polaron conduction, where the mobility mu(p) are between 0.01 and 0.0(2) cm(2) V-1 s(-1) regardless of temperature and P(O-2). Oxygen diffusivity derived from the electrical conductivity relaxation (ECR) after an abrupt change of P(O-2) increased with the increase P(O-2) and temperature. A new pulse isotope O-18-O-16 exchange (PIE) at 623-773 K was carried in order to rapidly determine the tracer oxygen surface reaction coefficient. The numerical relationship of oxygen diffusivity measured by ECR and PIE measurements was successfully established by the ambipolar diffusion theory and defect chemical analysis.

引用

页码：16264 / 16269

页数：6

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