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Title: 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 » of from 0 to about 30 mole percent. 2 figs.« less
Inventors:
;
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