Metal substrate for catalytic converter and catalyst carrier
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United States of America Patent
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Aug 13, 2019
Grant Date -
Mar 14, 2019
app pub date -
Oct 11, 2017
filing date -
Feb 28, 2017
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Abstract
A metal substrate for catalytic converter for purifying an exhaust gas includes a honeycomb core with metal flat foil and corrugated foil stacked in layers, and an oxide film having a thickness of 0.1 μm or more and 10 μm or less is formed in a predetermined range including an exposed end surface exposed toward the gas inlet side. The oxide film contains at least a first alumina including α-alumina and a Fe oxide. The α-alumina contains α-alumina with solid-solved Fe and α-alumina with no solid-solved Fe. In the oxide film, the content of the first alumina is 30% by mass or more and 99.5% by mass or less, the content of the Fe oxide is 0.5% by mass or more and 40% by mass or less, and the content of Fe is more than 7% by mass and 35% by mass or less.
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