Effect of Ceramic Filler Particles on the Sealing Capability of a SrO-based Glass Seal

Title
Effect of Ceramic Filler Particles on the Sealing Capability of a SrO-based Glass Seal
Authors
제해준윤경중손지원이종호김병국이해원
Keywords
SOEC; Seal; Ceramic Filler
Issue Date
2013-10
Publisher
ECS transactions
Citation
VOL 57, NO 1, 2357-2364
Abstract
The nano-sized YSZ and nano-sized Al2O3 powders were added to a SrO-Al2O3-B2O3-SiO2 glass system to control the effective viscosity and glass retention. Added filler particles evidently improved glass retention. YSZ/glass composites hardly devitrified after heat treating at 800 ℃ for 100 hours but Al2O3/glass composites easily devitrified. The devitrified phase, SrAl2Si2O8, decreased the CTE of Al2O3/glass composite to 5.6x10-6 /℃. Corrosion of Crofer22/APU was more severe due to contact with Al2O3/glass composite than with YSZ/glass composite. YSZ composite/glass showed the reliable sealing capability in long-term operation and repeated thermal cycles while the sealing of Al2O3/glass composite failed during thermal cycling. Such failure of Al2O3/glass composite was caused not only by the large thermal mismatch between Crofer22APU jig and sealing tape but also by intensifid corrosion of Crofer22APU.
URI
http://pubs.kist.re.kr/handle/201004/46002
ISSN
19385862
Appears in Collections:
KIST Publication > Article
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