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US 6,638,575 B1Granted
Plasma sprayed oxygen transport membrane coatings
AssigneePraxair Technology, Inc.
InventorsJack Chieh-Cheng Chen, Hancun Chen, Ravi Prasad, Glenn Whichard
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Abstract
Oxygen and hydrogen transport membranes fabricated by plasma spray deposition of a micro-crack-free coating on a substrate. Also disclosed is a multi-layer composite comprising a dense or porous substrate coated with a coating provided by supersonic plasma spray deposition. Also disclosed is subsonic plasma spray deposition of single phase or dual phase nanocrystalline particles to form a crack-free oxygen transport membrane on a substrate.
Claims5
A method of fabricating a mixed ionic and electronic conducting membrane layer comprising:
- feeding a single phase composition made up of agglomerates of particles to a plasma torch or gun, the particles within the agglomerates comprising a mixed ionic and electronic conducting material and having a particle size of less than 1000 nm;
- spraying said single phase composition in the presence of an inert gas as a plasma medium, at a supersonic speed from said plasma torch or gun;
- and
- depositing said single phase composition onto said porous or dense substrate in order to provide the electronic or ionic or mixed ionic and electronic conducting membrane layer in the form of a microcrack-free coating on the porous or dense substrate.
1 more element
Dependencies are inferred from the claim text.