Manufacture of beta-alumina artifacts
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 3, 1990
Grant Date -
N/A
app pub date -
Sep 30, 1988
filing date -
Oct 6, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention provides a method of making a composite beta-alumina artifact, such as a separator tube for an electrochemical cell, comprising two beta-alumina portions which are sealed together in a sealing zone, namely an inner portion and an outer portion which extends peripherally around the inner portion and embraces it in the sealing zone. The method comprises pressing the inner and outer portions from powders which, when sintered, shrink and form integral beta-alumina artifacts. The portions are then arranged so that the outer portion extends around the inner portion and embraces it in a sealing zone. The portions are then sintered to cause them to seal together hermetically in the sealing zone while converting each of the portions into a beta-alumina artifact. The portions are made so that the outer portion undergoes a greater degree of shrinkage during sintering than the inner portion and the portions are pressed so that the spacing between the portions where the outer portion extends around and embraces the inner portion is such that, upon sintering, the outer portion shrinks on to the inner portion to provide a hermetic peripheral seal between the portions.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully