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Method of making closed end ceramic fuel cell tubes

United States Patent

April 30, 2002
View the Complete Patent at the US Patent & Trademark Office
A method of manufacturing closed end ceramic fuel cell tubes with improved properties and higher manufacturing yield is disclosed. The method involves bonding an unfired cap to a hollow unfired tube to form a compound joint. The assembly is then fired to net shape without subsequent machining. The resultant closed end tube is superior in that it provides a leak-tight seal and its porosity is substantially identical to that of the tube wall. The higher manufacturing yield associated with the present method decreases overall fuel cell cost significantly.
Borglum; Brian P. (Edgewood, PA)
Siemens Westinghouse Power Corporation (Orlando, FL)
09/ 058,069
April 9, 1998
GOVERNMENT CONTRACT The Government of the United States of America has certain rights in this invention pursuant to Contract No. DE-FC21-91MC28055 awarded by the U.S. Department of Energy.