Electrode guiding wire slurry outside an oxygen sensor and manufacturing method thereof

A technology of oxygen sensor and manufacturing method, which is applied in the direction of material analysis, instruments, and scientific instruments through electromagnetic means, can solve the problems of poor corrosion resistance and high cost, and achieve the goals of reducing raw material costs, good film formation, and shortening working temperature the effect of time
CN101532985AInactive Publication Date: 2009-09-16深圳市日理江澍实业有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
深圳市日理江澍实业有限公司
Publication Date
2009-09-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention refers to an electrode guiding wire slurry outside an oxygen sensor and manufacturing method thereof. The main steps are following: mixing the platinum powder, golden powder and tungsten powder in the agate mortar evenly and adding the glass caking agent, organic caking agent and thinner to blend to obtain the electrode guiding wire slurry with a viscosity; then loading the mixed slurry to the minim point gum machine; covering two electrode guiding wires on the tubular zirconia basic body surface; after the high temperature sintering, the symmetrical guiding wires and the platinum electrode are fused together forming the oxygen sensor electrode. The invention has the advantages of low cost, high efficiency and high precision, which assures the great conductivity of the oxygen sensor and the filming capacity; and a less amount of electrode guiding wires with the tungsten has a enhanced conductivity, heat resisting, wearing and erosion resisting capacity and shortening the temperature increasing time, which is one of the most efficient method for reducing the oxygen sensor electrode cost and enhancing the performance.
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Description

Technical field:

[0001] The invention relates to an external electrode lead wire of an oxygen sensor for a vehicle, in particular to a low-cost, stable external electrode lead wire slurry and a manufacturing method thereof. Background technique:

[0002] The oxygen sensor is an essential component on an engine using a three-way catalytic converter. The oxygen sensor has a characteristic that its output voltage will change suddenly near the theoretical air-fuel ratio (14.7:1). This characteristic is used to detect the concentration of oxygen in the exhaust gas and feed it back to the ECU system to control the air-fuel ratio. The oxygen sensor can also make up for the error of the air-fuel ratio caused by the wear of the machinery and other parts of the EFI system. It can be said to be the only "intelligent" sensor in the EFI system.

[0003] The outer layer of the ceramic sensing head of the oxygen sensor is coated with platinum electrodes and external electrode lead wires....

Claims

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