NOx-DECOMPOSING ELECTRODE AND METHOD FOR PRODUCING NOx SENSOR
AssigneeNGK Insulators, Ltd.
InventorsYoshio Suzuki, Hideyuki Suzuki, Kunihiko Nakagaki
Life of this patent
Estimating the term…
Abstract
A detecting electrode is a NOx-decomposing electrode having a certain or a high NOx-decomposing/reducing ability, which is formed on a third solid electrolyte layer for decomposing a NOx to produce oxygen. The detecting electrode contains a noble metal Pt, a material ZrO2 of the third solid electrolyte layer, and a mixture containing silica (SiO2) and alumina (Al2O3). Specifically, the detecting electrode contains 80% to 90% by weight of the Pt, 9.5% to 19.8% by weight of the ZrO2, and 0.2% to 0.5% by weight of the mixture containing silica and alumina.
Claims11
A NOx-decomposing electrode having a certain or high NOx-decomposing/reducing ability, formed on a substrate for decomposing a NOx to produce oxygen,
- wherein said NOx-decomposing electrode comprises a noble metal, a material used in said substrate, and a mixture containing silica and alumina.
A method for producing a NOx sensor comprising a NOx-decomposing electrode having a certain or a high NOx-decomposing/reducing ability, formed on a substrate for decomposing a NOx to produce oxygen, wherein said method comprises the steps of:
- preparing a paste of a mixture containing a noble metal, a material used in said substrate, and kibushi clay, as a starting material;
- applying said paste to said substrate;
- and
- burning said substrate and said paste to form said NOx-decomposing electrode.
Dependencies are inferred from the claim text.