Gas sensor element and gas sensor equipped with the same
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United States of America Patent
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Dec 3, 2013
Grant Date -
Nov 17, 2011
app pub date -
May 13, 2011
filing date -
May 13, 2010
priority date (Note) -
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Abstract
A gas sensor element with a bottom part is composed of at least a solid electrolyte body of oxygen ion conductivity, a reference electrode, a detection electrode, an electrode protection layer which supports noble metal catalyst, and a heater. The electrode protection layer is composed of a covering layer, a catalyst layer and a poisoning layer. A quantity of the noble metal catalyst supported in the electrode protection layer at the bottom part of the gas sensor element is larger than that in the electrode protection layer at a leg part of the gas sensor. The bottom part of the gas sensor element has a high temperature rising speed more than the leg part when the heater generates heat energy.
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