Oxygen sensor with noncatalytic electrode
AssigneeNissan Motor Co., Ltd.
InventorsKimmochi Togawa, Hiroshi Takao, Kazuo Matoba, Katsuhiro Kishida
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Abstract
In an oxygen sensor having a solid electrolyte layer such as stabilized zirconia and two electrode layers form respectively on both sides of the electrolyte layer, at least one electrode which is to be exposed to a gas mixture subject to measurement is made of carbon silicide to avoid catalyzing oxidation reactions, optionally with the addition of a minor amount of trisilicon tetranitride as a binder. The sensor features an exact and noticeable dependence of its output voltage on the oxygen concentration in a gas mixture in a non-equilibrated state as typified by an engine exhaust gas.
Claims10
In an oxygen sensor for sensing the difference in oxygen concentration between two gases, the sensor having a layer of solid oxygen-ion electrolyte, a first electrode layer formed on one side of the electrolyte layer to be exposed to a gas subject to measurement and a second electrode layer formed on the opposite side of the electrode layer to be exposed to a reference gas, both the first and second electrode layers being permeable to gas, the improvement comprising said first electrode layer being made of a material comprising carbon silicide as a sole conductive component thereof.
Dependencies are inferred from the claim text.