0
research-article

Evaluation and application of a novel BaO-CaO-SiO2CoO-B2O3 based glass-ceramic sealing material for solid oxide fuel cells

[+] Author and Article Information
Zhaonan Li

School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science & Technology, Wuhan, Hubei 430074, P.R. China
lizhaonan0109@163.com

Jiajun Yang

School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science & Technology, Wuhan, Hubei 430074, P.R. China
yangjiajun@hust.edu.cn

Dong Yan

School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science & Technology, Wuhan, Hubei 430074, P.R. China
yand@hust.edu.cn

Ping Feng

College of Materials and Chemical Engineering, Key laboratory of inorganic nonmetallic crystalline and energy conversion materials, China Three Gorges University, Yichang, Hubei 443002, P.R. China
fengping@ctgu.edu.cn

Jian Pu

School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science & Technology, Wuhan, Hubei 430074, P.R. China
pujian@hust.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4037648 History: Received February 27, 2017; Revised June 27, 2017

Abstract

Sealant is used in a SOFC stack to separate fuel and oxygen from burning with each other throughout the stack's lifetime cycle. Various sealing materials have been developed and the glass sealant shows quite a potential for its low leaking rate. However, glass sealants usually suffer from fractures during thermal cycle because of their low temperature brittleness and mismatched coefficient of thermal expansion. Recently, we have developed a novel glass-based sealant consists of BaO-CaO-SiO2-CoO and a small amount of Al2O3 powder which is used to adjust the CTE and reinforce its mechanical performance. The sealant exhibited a good performance with the leaking rates less than 0.04 sccm.cm-1 under compressive load of 0.17 MPa at 750 °C and showed stable leak rates over several thermal cycles. The well bonded interfaces and chemical compatibility have been identified by microstructure analysis of the seals. The sealant also demonstrated its applicability in a 1-cell stack test.

Copyright (c) 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In