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METHOD FOR SEALING AN OXYGEN TRANSPORT MEMBRANE ASSEMBLY

United States Patent Application

*** PATENT GRANTED ***
20140169862
9,969,645
A1
View the Complete Application at the US Patent & Trademark Office
An improved method of sealing a ceramic part to a solid part made of ceramic, metal, cermet or a ceramic coated metal is provided. The improved method includes placing a bond agent comprising an Al.sub.2O.sub.3 and SiO.sub.2 based glass-ceramic material and organic binder material on adjoining surfaces of the ceramic part and the solid part. The assembly is heated to a first target temperature that removes or dissolves the organic binder material from the bond agent and the assembly is subjected to a second induction heating step at a temperature ramp rate of between about 100.degree. C. and 200.degree. C. per minute to temperatures where the glass-ceramic material flows and wets the interface between adjoining surfaces. The assembly is rapidly cooled at a cooling rate of about 140.degree. C. per minute or more to induce nucleation and re-crystallization of the glass-ceramic material to form a dense, durable and gas-tight seal.
Gonzalez, Javier E. (East Amherst, NY), Grant, Arthur F. (Amherst, NY)
14/ 134,276
December 19, 2013
U.S. GOVERNMENT RIGHTS [0002] This invention was made with Government support under Cooperative Agreement No. DE-FC26-07NT43088, awarded by the United States Department of Energy. The Government has certain rights in this invention.