THIN FILM AND COMPOSITE ELEMENT PRODUCED FROM THE SAME
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United States of America Patent
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Issued Date -
Jan 29, 2009
app pub date -
Oct 16, 2006
filing date -
Oct 19, 2005
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Abandoned
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Abstract
A thin film consisting of at least two layers of a ceramic material, a ceramic and metallic material, or in the case of several layers a metallic material. All layers of the thin film have a maximum average particle size of approximately 500 nm and at least two layers consist of different material. In at least one of said layers, an essentially stable average particle size remains after a relaxation time, even in an increased temperature range. The mechanical stability is preferably reinforced by a supporting, essentially flat substrate. In the composite element, the thickness of the substrate is at least five times and in particular between ten and a hundred times the thickness of the thin film. The composite element can be successfully used in a miniaturised electrochemical device, in particular in a solid oxide fuel cell SOFC, a sensor or as a gas separation membrane.
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