BaO–B2O3–SiO2–Al2O3 sealing glass for intermediate temperature solid oxide fuel cell

• Published in: Journal of non-crystalline solids Vol. 358; no. 2; pp. 174 - 181
• Main Authors: Lin, S.E., Cheng, Y.R., Wei, W.C.J.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier B.V 15.01.2012; Elsevier
• Subjects: Al2O3; Applied sciences; B2O3; BaO; Contact; Cross-disciplinary physics: materials science; rheology; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Formulations; Glass; Glasses (including metallic glasses); Materials and auxiliary equipments used in energy engineering; Materials science; Physics; Precipitates; Sealing; SiO2; SOFC; Solid oxide fuel cells; Specific materials; Thermal expansion; Yttria stabilized zirconia; BaO; B2O3; SiO2; Al2O3; SOFC; Sealing materials; Aluminium oxide; Crystalline phase; Solid oxide fuel cells; B; Boron oxide; Wetting; Crystallization; Doping; Glass; XRD; Al; Heat treatments; Glass formation; O; Thermal expansion; Quaternary systems; Barium oxide; Silicon oxides; SiO; Kinetics
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2011.09.013

Glasses in the formulation close to BaSiO3–BaB2O4 eutectic compound are developed for sealing of intermediate-temperature (500–650°C) solid oxide fuel cell (IT-SOFC). Thermal and microstructural analyses of the glasses with 0–10mol% Al2O3 are also conducted. Detailed crystallization kinetics and interfacial stability of the glass in contact with yttria-stabilized zirconia (YSZ) and samaria-doped ceria (SDC) are investigated and compared. The results show that the formulation, 47BaO–21B2O3–27SiO2–5Al2O3 (G1A5), performs the best on glass forming ability (GFA) among all tested formulations, and shows matched thermal expansion and working temperature to CeO2-based electrolytes of IT-SOFC. Two major crystalline phases that precipitate from G1A5 above 750°C are platy hexacelsian and BaSiO3 grains. ► We have investigated 7 glass formulations and completed the thermal property tests. ► Detailed kinetics and stability of the glass compatible with YSZ and SDC are also investigated. ► The glass 47BaO-21B2O3-27SiO2-5Al¬2O3, performs the best on glass forming ability (GFA). ► The glasses have the matched CTE and aging properties to CeO2-based electrolyte of IT-SOFC.