Thermo-chemical Stability of Ionic Conductor Na0.5Bi0.49Ti0.98Mg0.02O3-δ

被引：0

作者：

Liu Y. ^{[1
]}

Luo F. ^{[1
]}

Fang X. ^{[1
]}

Wang Y. ^{[1
]}

Zeng J. ^{[1
]}

Yan X. ^{[1
]}

Chen X. ^{[1
,2
]}

机构：

[1] School of Resources, Environment and Materials, Guangxi University, Nanning

[2] Guangxi Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Nanning

来源：

Chen, Xiyong (xiyongchen@gxu.edu.cn) | 2018年 / Chinese Ceramic Society卷 / 46期

关键词：

Cathode; Electrolyte; Oxide-ion conductor; Sodium bismuth titanate; Thermal compatibility; Thermo-chemical stability;

D O I：

10.14062/j.issn.0454-5648.2018.06.16

中图分类号：

学科分类号：

摘要：

Perovskite materials of Na0.5Bi0.49Ti0.98Mg0.02O3-(NBTMg-4902) have a high ionic conductivity at 400–700 ℃, and they are regarded as a potential electrolyte in the application of intermediate-temperature solid oxide fuel cells (IT-SOFC). However, its thermo-chemical stability has not been reported yet. For this purpose, this paper investigated its thermo-chemical compatibility with a few common SOFC cathode materials and its own chemical stability in a reduced atmosphere by X-ray diffraction, scanning electron microscopy, and synchronic differential thermal analysis-thermal gravimetry, respectively. The results show that NBTMg-4902 suffers decomposition in a 5%H2/95%N2 atmosphere to produce metallic Bi and it also has a poor thermo-chemical compatibility with common SOFC cathode materials. All these findings indicate its limitation in the application as an effective electrolyte in SOFC. © 2018, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.

引用

页码：854 / 860

页数：6

共 17 条

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