An alkali-free barium borosilicate viscous sealing glass for solid oxide fuel cells
| Autor: | Rob Baird, Jen-Hsien Hsu, Joe Szabo, Cheol-Woon Kim, Richard K. Brow, Ray Crouch |
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| Rok vydání: | 2014 |
| Předmět: |
Thermal shock
Materials science Renewable Energy Sustainability and the Environment Borosilicate glass Sealant Reducing atmosphere Aluminized steel Oxide Energy Engineering and Power Technology engineering.material law.invention chemistry.chemical_compound chemistry law engineering Electrical and Electronic Engineering Physical and Theoretical Chemistry Crystallization Composite material Yttria-stabilized zirconia |
| Zdroj: | Journal of Power Sources. 270:14-20 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2014.07.088 |
| Popis: | An alkali-free, alkaline earth borosilicate glass (designated G102) has been developed as a viscous sealant for use with solid oxide fuel cells (SOFCs). The glass possesses the requisite viscosity, electrical resistivity, and thermal and chemical stability under SOFC operating conditions to act as a reliable sealant. Sandwich seals between aluminized stainless steel and a YSZ/NiO–YSZ bilayer survived 148 thermal cycles (800 °C to room temperature) in both oxidizing and reducing atmospheres at a differential pressure of ∼3.4 kPa (0.5 psi) without failure. For sandwich seals that were held at 800 °C for up to 2280 h in air, G102 resisted crystallization, there were limited interactions at the G102/YSZ interface, but BaAl 2 Si 2 O 8 crystals formed at the glass/metal interface because of the reaction between the glass and the aluminized steel. Sandwich seals that were intentionally cracked by thermal shock resealed to became hermetic upon reheating to temperatures as low as 744 °C. |
| Databáze: | OpenAIRE |
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