Compliant sealants for solid oxide fuel cells and other ceramics

Patent · Sun Jan 01 00:00:00 EST 1995

OSTI ID:870082

Bloom, Ira D ^[1]; Ley, Kevin L ^[1]

---

1. Bolingbrook, IL

A glass or glass-ceramic sealant for a SOFC having a coefficient of thermal expansion in the range of from about 8 to about 13.times.10.sup.-6 /.degree.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.degree. C. to about 1000.degree. 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 range of from 0 to about 30 mole percent.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• DOE Contract Number: W-31109-ENG-38
• Assignee: University of Chicago (Chicago, IL)
• Patent Number(s): US 5453331
• OSTI ID: 870082
• Country of Publication: United States
• Language: English

Related Subjects

compliant
sealants
solid
oxide
fuel
cells
ceramics
glass
glass-ceramic
sealant
sofc
coefficient
thermal
expansion
range
13
times
10
-6
degree
viscosity
pa-s
cell
operating
temperature
composition
sro
60
mole
percent
45
15
80
sio
40
material
viscous
fluid
temperatures
600
1000
compounds
cao
35
85
30
fuel cell
thermal expansion
fuel cells
oxide fuel
solid oxide
mole percent
operating temperature
operating temperatures
cell operating
compliant seal
ceramic seal
/429/