Glass and glass-ceramic sealant compositions

Details Glass and glass-ceramic sealant compositions Glass and glass-ceramic sealant compositions

2008-07-15

2008-07-15

Blackwell, G. (Department: 1775)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S018000, C501S073000, C501S077000, C501S079000

Reexamination Certificate

active

10966614

ABSTRACT:
A glass composition for use as a sealant or otherwise bonded to a fuel cell component, including from about 40 mol % to about 60 mol % RO; from about 2 mol % to about 10 mol % M2O3; and from about 35 mol % to about 45 mol % SiO2. R is selected from the group including strontium, calcium, magnesium and zinc and combinations thereof. M is selected from the group including aluminum, boron, lanthanum, iron and combinations thereof. The glass includes at least about 5 mol % ZnO. Upon heat treatment, the glass at least partially crystallizes with the formation of at least one alkaline earth-zinc pyrosilicate crystalline phases.

REFERENCES:
patent: 6430966 (2002-08-01), Meinhardt et al.
patent: 6532769 (2003-03-01), Meinhardt et al.
patent: 2006/0063659 (2006-03-01), Xue et al.

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