|
|||||
|
|
High gas tightness ZrO2-added silicate glass sealant with low thermal stress for solid oxide fuel cells |
|
| Affiliation: | 1. Research Center of Solid Oxide Fuel Cell, China University of Mining and Technology-Beijing, Beijing, 100083, China;2. Department of Energy Sciences, Faculty of Engineering, Lund University, P.O. Box 118, SE-221 00, Lund, Sweden;3. School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, Scotland, UK;1. School of Material Science and Engineering, Shandong University of Technology, Zibo, 255049, PR China;2. Beijing Special Engineering and Design Institute, Beijing, 100036, PR China;1. Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi, 830011, China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Science, Beijing, 100049, China;1. US-Pakistan Center for Advanced Studies in Energy (USPCAS-E), National University of Sciences & Technology (NUST), Islamabad, Pakistan;1. Nigde University, Mechanical Engineering Department, Nigde, Turkey;2. Melikşah University, Mechanical Engineering Department, Kayseri, Turkey |
| 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 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. |
| Keywords: | Solid oxide fuel cell Glass sealant Thermal expansion coefficient Leakage rate Thermal stress |
| 本文献已被 ScienceDirect 等数据库收录！ | |