Properties of particle-filled glass composites used for sealing solid oxide fuel cells

Erica L. Corral, Bryan D. Gauntt, Ronald E. Loehman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Sealant materials for solid oxide fuel cells (SOFCs) must meet a demanding set of performance criteria for operating lifetimes of up to 40,000 hr. The resulting seals must be gas tight at temperatures up to 1000°C, resist stresses from thermal gradients and expansion mismatch of different stack materials, and perform reliably over long times at high temperatures in both oxidizing and reducing atmospheres. Ceramic and metal filled glass composite sealants provide for greater design flexibility than other approaches. The seal properties can be tailored by varying the composition, amount, and microstructure of the particulate phase. Composite properties such as glass transition temperature, viscosity, and thermal expansion coefficient can be altered by rational control of the glass chemistry and composite microstructure. Several specific materials combinations have been engineered to meet the demanding set of criteria for sealing materials in SOFCs and characterized by means of viscosity measurements at the proposed operating temperature of 750°C The influence of the matrix/particle interactions has been separated from the mechanical effects of the added phase in studies that systematically vary the chemical composition of the particles. Models for composite suspension viscosity were also used to interpret the observed variation in viscosity with composition and volume fraction of the filler.

Original languageEnglish (US)
Title of host publicationAdvances in Solid Oxide Fuel Cells III - A Collection of Papers Presented at the 31st International Conference on Advanced Ceramics and Composites
Pages315-323
Number of pages9
Edition4
StatePublished - Dec 22 2008
Externally publishedYes
Event31st International Conference on Advanced Ceramics and Composites - Daytona Beach, FL, United States
Duration: Jan 21 2007Jan 26 2007

Publication series

NameCeramic Engineering and Science Proceedings
Number4
Volume28
ISSN (Print)0196-6219

Other

Other31st International Conference on Advanced Ceramics and Composites
CountryUnited States
CityDaytona Beach, FL
Period1/21/071/26/07

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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  • Cite this

    Corral, E. L., Gauntt, B. D., & Loehman, R. E. (2008). Properties of particle-filled glass composites used for sealing solid oxide fuel cells. In Advances in Solid Oxide Fuel Cells III - A Collection of Papers Presented at the 31st International Conference on Advanced Ceramics and Composites (4 ed., pp. 315-323). (Ceramic Engineering and Science Proceedings; Vol. 28, No. 4).