Coating apparatus and method for platinum electrode in oxygen sensor

An oxygen sensor and coating device technology, applied in the field of coating devices for platinum electrodes in oxygen sensors, can solve the problems of low efficiency, high cost, poor accuracy, etc., achieve accurate positioning, reduce wire breakage rate, and avoid platinum waste. Effect

Inactive Publication Date: 2009-08-05
深圳市日理江澍传感材料科学与工程研究院
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  • Abstract
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Problems solved by technology

[0005] For this reason, the purpose of the present invention is to provide a coating device and method for platinum electrodes

Method used

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  • Coating apparatus and method for platinum electrode in oxygen sensor
  • Coating apparatus and method for platinum electrode in oxygen sensor

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Embodiment Construction

[0033] The core idea of ​​the present invention is: first prepare the pure platinum electrode slurry, stir it evenly, put it into the syringe of the micro-dispenser, and then control the needle to enter the sleeve-shaped zirconia matrix of the oxygen sensor through the PLC controller and the micro-controller Inside, and from the inside to the outside, two opposite linear platinum electrodes are coated on the inner surface of the sleeve-shaped zirconia substrate of the oxygen sensor. After the coating is completed, the zirconia substrate is placed in a high-temperature sintering furnace for high-temperature sintering.

[0034] 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.

[0035] The invention provides a coating device for a platinum electrode in an oxygen sensor and a method for coating a platinum electrode in an oxygen sensor by...

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Abstract

The invention discloses a device and a method for coating a platinum electrode in an oxygen sensor. The method includes the following steps: A. preparing pure platinum slurry with electrode platinum granule diameter being 1-15 micrometers, slurry solid content being 40-80 percent and viscosity coefficient being 30-60kcps; B. filling the pure platinum slurry into a pin case of a micro point gum machine and respectively coating one electrode at two corresponding sides of the inner surface of a canular zirconium dioxide basal body of the oxygen sensor through the micro point gum machine; C. placing the canular zirconium dioxide basal body of the oxygen sensor coated with an inner platinum electrode film in a high temperature sintering furnace and sintering the canular zirconium dioxide basalbody for 4-7 hours at the temperature of 1400-1600 DEG C. The invention has the advantages of controllable coating speed, accurate coating and positioning and effective production cost saving; in addition, the oxygen sensor produced by the invention has the advantages of good reproducibility of output signals, low break ratio and high degree of automation.

Description

Technical field: [0001] The invention relates to a platinum electrode in an oxygen sensor for a vehicle, in particular to a coating device and method for a platinum electrode in an oxygen sensor. The method can freely control the coating speed of the platinum electrode in an oxygen sensor, and can ensure accurate coating. position. Background technique: [0002] The function of the automobile oxygen sensor is to obtain the signal of the air-fuel ratio of the mixture by detecting the oxygen content in the exhaust gas, and send the voltage signal of the detection result back to the ECU (Electronic Control Units) in the car. The voltage signal sent back continuously corrects the fuel injection pulse width to keep the mixture concentration within the ideal air-fuel ratio range, realize the feedback control of the best air-fuel ratio, and ensure that the three-way catalytic converter can control the exhaust gas. The three pollutants of hydrocarbons, carbon monoxide and nitrogen ...

Claims

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Application Information

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IPC IPC(8): G01N27/417
Inventor 江澍连儒宏薄向辉熊孟
Owner 深圳市日理江澍传感材料科学与工程研究院
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