Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2007-08-21
2007-08-21
Alejandro, Raymond (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C429S006000, C277S650000, C277S943000
Reexamination Certificate
active
10656300
ABSTRACT:
A mica based compressive seal has been developed exhibiting superior thermal cycle stability when compared to other compressive seals known in the art. The seal is composed of compliant glass or metal interlayers and a sealing (gasket) member layer composed of mica that is infiltrated with a glass forming material, which effectively reduces leaks within the seal. The compressive seal shows approximately a 100-fold reduction in leak rates compared with previously developed hybrid seals after from 10 to about 40 thermal cycles under a compressive stress of from 50 psi to 100 psi at temperatures in the range from 600° C. to about 850° C.
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Y-S Chou, J. W. Stevenson, and L, A. Chick; “Ultra-low leak rate of hybrid compressive mica seals for solid oxide fuel cells”, Journal of Power Sources, 112, pp. 130-136 (2002).
Y-S Chou, and J. W. Stevenson, “Thermal cycling and degradation mechanisms of compressive mica-based seals for SOFCs”, Journal of Power Sources, 112 pp. 373-383 (2002).
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Y-S Chou, J. W. Stevenson, and L, A. Chick, “Mid-term stability of novel mica-based compressive seals for solid oxide fuel cells”,Journal of Power Sources,115 pp. 274-278 (2003).
Chou Yeong-Shyung
Stevenson Jeffry W.
Alejandro Raymond
Battelle (Memorial Institute)
Matheson James D.
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