Determination of the ionic conductivity of Sr-doped lanthanum manganite by modified Hebb-Wagner technique

被引：10
|
作者：
Miruszewski, T. [1 ]
Karczewski, J. [1 ]
Bochentyn, B. [1 ]
Jasinski, P. [2 ]
Gazda, M. [1 ]
Kusz, B. [1 ]
机构：
[1] Gdansk Univ Technol, Fac Appl Phys & Math, Dept Solid State Phys, Narutowicza 11-12, PL-80233 Gdansk, Poland
[2] Gdansk Univ Technol, Fac Elect Telecommun & Informat, Dept Biomed Engn, Narutowicza 11-12, PL-80233 Gdansk, Poland
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2016年 / 91卷
关键词：
Oxygen diffusion; Perovskites; ionic conductivity; Hebb-Wagner method; LSM; PEROVSKITE-TYPE OXIDES; ELECTRONIC CONDUCTIVITY; TRANSPORT; POLARIZATION;
D O I：
10.1016/j.jpcs.2016.01.005
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The Hebb Wagner polarization method with the electron blocking electrode has been discussed in this paper in aim to determine a partial ionic conductivity of Sr-doped lanthanum manganite. The "limiting current" in the proposed system was measured using the two-point DC technique with additional Pt electrode between LSM and blocking electrode. The electrochemical model based on bulk diffusion processes and Boltzmann statistics has been also described. The ionic conductivity calculated with the use of proposed model for La0.7Sr0.3MnO3+delta was 5.3 x 10(-4) S cm(-1) at 800 degrees C and the activation energy of ionic conductivity was found to be (0.60 +/- 0.02) eV. This result is in agreement with previous literature reports and indicates the workability of the modified Hebb-Wagner system. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：163 / 169
页数：7
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