Crystallization and processing of SOFC sealing glasses

• Published in: Journal of non-crystalline solids Vol. 356; no. 52; pp. 3009 - 3012
• Main Authors: Reis, S.T., Pascual, M.J., Brow, R.K., Ray, C.S., Zhang, T.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Oxford Elsevier B.V 01.12.2010; Elsevier
• Subjects: Cross-disciplinary physics: materials science; rheology; Crystallization; Differential thermal analysis; Exact sciences and technology; Glass; Glass-ceramic; Growth from solid phases (including multiphase diffusion and recrystallization); High-speed machining; Materials science; Methods of crystal growth; physics of crystal growth; Microscopy; Particle size; Physics; Sealing; Sealing glasses; Silicates; SOFC; Solid oxide fuel cells; Sealing glasses; Glass-ceramic; Crystallization; SOFC; Sealing materials; Particle size; Sintering; Glass; Thermal expansion coefficient; Differential thermal analysis; Silicates; Glass ceramics
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2010.02.028

The crystallization processes that occur in alkaline earth silicate glasses designed for sealing solid oxide fuel cells (SOFC) have been investigated using differential thermal analysis (DTA) and hot-stage microscopy (HSM). HSM experiments revealed that glass powders with particle sizes < 45 μm crystallized before viscous sintering was complete. This behavior is consistent with the effects of glass particle size on the characteristic temperatures measured by DTA. The importance and role of the specific crystallization process on the effectiveness of glasses for SOFC sealing applications are discussed.