Title

Designing Sealing Glasses for Solid Oxide Fuel Cells

Abstract

Thermal and chemical properties of "invert" glasses and glass-ceramics developed for hermetic seals for solid oxide fuel cells are described. The glasses crystallize to form thermally stable pyro- and orthosilicate phases with the requisite thermal expansion match to the Y-stabilized ZrO2 (YSZ) electrolyte. In addition, the glasses bond to Cr-steel substrates at 800-850 °C without forming extensive interfacial reaction products. The thermal expansion characteristics of the glass-ceramics remain essentially unchanged after 28 days at 750 °C. Compositions with lower (<2 mol%) B2O3 contents exhibit the lowest volatilization rates when exposed to wet forming gas at 750 °C.

Department(s)

Materials Science and Engineering

Sponsor(s)

Aker Industries Inc.
Sandia Laboratories

Keywords and Phrases

Hermetic Seals

Library of Congress Subject Headings

Glass-ceramics
Solid oxide fuel cells

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2006 Springer Verlag, All rights reserved.

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