Inventors:
Barrie H. Bieler - Walnut Creek CA
Floris Y. Tsang - Walnut Creek CA
Assignee:
The Dow Chemical Company - Midland MI
International Classification:
H01M 436
Abstract:
Cracks, in ceramic wall members, on the order of 1 micron or less in width are plugged helium-tight by selectively leaching a component of the wall member with a solvent, letting the resultant leach form a liquid bridge within the crack, removing the solvent and sintering the resultant residue. This method is of particular value for remedying microcracks or channels in a cell member constituting a tubesheet in a hollow fiber type, high temperature battery cell, such as a sodium/sulfur cell, for example.