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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

Inactive Publication Date: 2009-09-16
深圳市日理江澍实业有限公司
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Problems solved by technology

[0005] For this reason, the purpose of the present invention is to provide a new method of slurry for the lead wire of the external electrode of the oxygen sensor and its manufacture, to solve the problems of high cost, wear resistance and poor corrosion resistance of the existing preparation methods

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

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Embodiment Construction

[0017] The core idea of ​​the present invention is: mix platinum powder, gold powder and tungsten powder evenly to make a slurry, and then use a micro-dispenser to coat the slurry with two symmetrical electrode lead-out lines on the surface of the sleeve-shaped zirconia substrate , After high-temperature sintering, it is integrated with the platinum electrode to form the outer electrode of the oxygen sensor.

[0018] In order to illustrate the idea and purpose of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] The invention provides a slurry for the lead-out wire of an oxygen sensor external electrode and a new method for its manufacture. The specific implementation steps are as follows:

[0020] A. Fully mix platinum powder, gold powder and tungsten powder with a particle size range of 0.5-5 μm and a weight ratio of 60%, 30% and 10% in a mortar, and then add 20% of a ...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/403
Inventor 连儒宏薄向辉熊孟江澍
Owner 深圳市日理江澍实业有限公司
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