Electrode for gas sensor, and gas sensor
AssigneeNgk Spark Plug Co., Ltd.
InventorsSeiji OYA, Yuta OISHI
Life of this patent
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Abstract
Provided are: an electrode for a gas sensor formed as a porous electrode so as to stably allow reduction in electrode resistance for excellent low-temperature activity; and a gas sensor. The electrode (108, 110) for the gas sensor is adapted for use on a surface of a solid electrolyte body (109), which is predominantly formed of zirconia, and contains particles (2) of a noble metal or an alloy thereof, first ceramic particles (4) of stabilized zirconia or partially stabilized zirconia and second ceramic particles (6) of one or more selected from the group consisting of Al2O3, MgO, La2O3, spinel, zircon, mullite and cordierite, wherein the second ceramic particles are contained in an amount smaller than that of the first ceramic particles.
Claims5
A gas sensor comprising:
- a solid electrolyte body predominantly formed of zirconia;
- and a pair of electrodes arranged on the solid electrolyte body,
- wherein each of the electrodes comprises:
- particles formed of a noble metal or an alloy thereof;
- first ceramic particles formed of stabilized zirconia or partially stabilized zirconia;
- and
- second ceramic particles formed of one or more selected from the group consisting of Al2O3, MgO, La2O3, spinel, zircon, mullite and cordierite;
- and
- wherein a ratio of an amount of the second ceramic particles to an amount of the first ceramic particles is greater than or equal to 3 volume % and less than 40 volume %.
Dependencies are inferred from the claim text.