Plugging micro-leaks in multi-component, ceramic tubesheets with material leached therefrom

Patent · Tue Mar 19 04:00:00 EST 1985

OSTI ID:7250598

Bieler, B H; Tsang, F Y

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. 1 fig.

• DOE Contract Number: AC02-76ET25103
• Assignee: Dow Chemical Co., Midland, MI (United States)
• Patent Number(s): US 4505995; A
• Application Number: PPN: US 6-312588
• OSTI ID: 7250598
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
BATTERY SEPARATORS
CERAMICS
CRACKS
DISSOLUTION
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
FABRICATION
LEACHING
METAL-NONMETAL BATTERIES
REPAIR
SEPARATION PROCESSES
SINTERING
SIZE
SODIUM-SULFUR BATTERIES