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High gas tightness ZrO2-added silicate glass sealant with low thermal stress for solid oxide fuel cells

Guo, Mengyuan ; Zhang, Xiaoqiang LU ; Li, Ying ; Andersson, Martin LU ; Yang, Zhibin and Peng, Suping (2023) In Ceramics International 49(12). p.19708-19716
Abstract

A low leakage rate sealant of 10 wt% ZrO2-added CaO–K2O–Na2O–BaO silicate glass for SOFC has been studied. The structure of the sealant is stable at high temperatures with leakage rates less than 10−4 sccm∙cm−1, and no crystal except for ZrO2 is found in XRD analysis after heating at 800 °C for 100 h. ZrO2 is distributed in the glass matrix and plays a supporting role in avoiding over-softening at operating temperature. Good compatibility in both oxidizing and reducing atmospheres between the sealant and SUS430 interconnect was proved by SEM at 750 °C for 100 h. A fully coupled 3D Multiphysics button SOFC is constructed for mechanical analyses. The results show... (More)

A low leakage rate sealant of 10 wt% ZrO2-added CaO–K2O–Na2O–BaO silicate glass for SOFC has been studied. The structure of the sealant is stable at high temperatures with leakage rates less than 10−4 sccm∙cm−1, and no crystal except for ZrO2 is found in XRD analysis after heating at 800 °C for 100 h. ZrO2 is distributed in the glass matrix and plays a supporting role in avoiding over-softening at operating temperature. Good compatibility in both oxidizing and reducing atmospheres between the sealant and SUS430 interconnect was proved by SEM at 750 °C for 100 h. A fully coupled 3D Multiphysics button SOFC is constructed for mechanical analyses. The results show that the increase of ZrO2 in the sealant will decrease the stress and displacement in the SOFC. Besides, the width of the sealant also affects the stress value and distribution. The results show that GZ10 is a competitive sealing material compared with other ZrO2-added sealants.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Glass sealant, Leakage rate, Solid oxide fuel cell, Thermal expansion coefficient, Thermal stress
in
Ceramics International
volume
49
issue
12
pages
9 pages
publisher
Elsevier
external identifiers
  • scopus:85150349433
ISSN
0272-8842
DOI
10.1016/j.ceramint.2023.03.088
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2023 Elsevier Ltd and Techna Group S.r.l.
id
24da7866-962a-4467-be3c-4bb1911bee81
date added to LUP
2023-04-10 18:18:39
date last changed
2023-07-04 09:05:07
@article{24da7866-962a-4467-be3c-4bb1911bee81,
  abstract     = {{<p>A low leakage rate sealant of 10 wt% ZrO<sub>2</sub>-added CaO–K<sub>2</sub>O–Na<sub>2</sub>O–BaO silicate glass for SOFC has been studied. The structure of the sealant is stable at high temperatures with leakage rates less than 10<sup>−4</sup> sccm∙cm<sup>−1</sup>, and no crystal except for ZrO<sub>2</sub> is found in XRD analysis after heating at 800 °C for 100 h. ZrO<sub>2</sub> is distributed in the glass matrix and plays a supporting role in avoiding over-softening at operating temperature. Good compatibility in both oxidizing and reducing atmospheres between the sealant and SUS430 interconnect was proved by SEM at 750 °C for 100 h. A fully coupled 3D Multiphysics button SOFC is constructed for mechanical analyses. The results show that the increase of ZrO<sub>2</sub> in the sealant will decrease the stress and displacement in the SOFC. Besides, the width of the sealant also affects the stress value and distribution. The results show that GZ10 is a competitive sealing material compared with other ZrO<sub>2</sub>-added sealants.</p>}},
  author       = {{Guo, Mengyuan and Zhang, Xiaoqiang and Li, Ying and Andersson, Martin and Yang, Zhibin and Peng, Suping}},
  issn         = {{0272-8842}},
  keywords     = {{Glass sealant; Leakage rate; Solid oxide fuel cell; Thermal expansion coefficient; Thermal stress}},
  language     = {{eng}},
  number       = {{12}},
  pages        = {{19708--19716}},
  publisher    = {{Elsevier}},
  series       = {{Ceramics International}},
  title        = {{High gas tightness ZrO<sub>2</sub>-added silicate glass sealant with low thermal stress for solid oxide fuel cells}},
  url          = {{http://dx.doi.org/10.1016/j.ceramint.2023.03.088}},
  doi          = {{10.1016/j.ceramint.2023.03.088}},
  volume       = {{49}},
  year         = {{2023}},
}