Sealing of ceramic electrolyte tubes in electrochemical cells

Details Sealing of ceramic electrolyte tubes in electrochemical cells Sealing of ceramic electrolyte tubes in electrochemical cells

1980-03-25

1981-10-13

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Fluid active material or two-fluid electrolyte combination...

Active material in molten state

429174, H01M 208

Patent

active

042948975

ABSTRACT:
In an electrochemical cell such as a sodium sulphur cell using a ceramic electrolyte tube (e.g. of beta-alumina), the electrolyte tube is secured to a rigid annular element of, for example, alpha-alumina, having substantially the same coefficient of thermal expansion as the electrolyte tube, this annular element being radially thicker than the electrolyte tube and having two oppositely sloping tapered surfaces on its outer face. Metal elements are then forced onto the tapered surfaces with an interstrate layer of soft metal, e.g. aluminium, which deforms into a groove or grooves in the tapered surfaces to form a hermetic seal.

REFERENCES:
patent: 3959013 (1976-05-01), Breiter
patent: 3982957 (1976-09-01), Jones
patent: 4011367 (1977-03-01), Evans et al.
patent: 4170694 (1979-10-01), Chase et al.

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