Compliant sealants for solid oxide fuel cells and other ceramics
A glass or glass-ceramic sealant is described for a SOFC having a coefficient of thermal expansion in the range of from about 8 to about 13{times}10{sup {minus}6}/C and a viscosity of at least 10{sup 3}Pa-s at cell operating temperature. The sealant has a composition of SrO present in the range of from about 5 to about 60 mole percent, La{sub 2}O{sub 3} present in the range of from 0 to about 45 mole percent, Al{sub 2}O{sub 3} present in the range from 0 to about 15 mole percent, B{sub 2}O{sub 3} present in the range of from about 15 mole percent to about 80 mole percent, and SiO{sub 2} present in the range of from 0 to about 40 mole percent, wherein the material is a viscous fluid at cell operating temperatures of from about 600 C to about 1000 C. The sealant may also be compounds of CaO present in the range of from 0 to about 35 mole percent, Al{sub 2}O{sub 3} present in the range from 0 to about 15 mole percent, B{sub 2}O{sub 3} present in the range of from about 35 mole percent to about 85 mole percent, and SiO{sub 2} present in the rangemore »
- Issue Date:
- OSTI Identifier:
- 106697
- Assignee:
- Univ. of Chicago, IL (United States) PTO; SCA: 300503; PA: EDB-95:135533; SN: 95001461637
- Patent Number(s):
- US 5,453,331/A/
- Application Number:
- PAN: 8-289,751
- Contract Number:
- W-31109-ENG-38
- Resource Relation:
- Other Information: PBD: 26 Sep 1995
- Research Org:
- Univ. of Chicago, IL (United States)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 30 DIRECT ENERGY CONVERSION; SOLID ELECTROLYTE FUEL CELLS; SEALS; DESIGN; CHEMICAL COMPOSITION; STRONTIUM OXIDES; LANTHANUM OXIDES; ALUMINIUM OXIDES; BORON OXIDES; SILICON OXIDES; CALCIUM OXIDES; MOLTEN SALTS