Method for fabricating sheet oxygen sensor

A technology of oxygen sensor and manufacturing method, which is applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems of difficult sealing, chip defect, fracture, etc., and achieve easy control of the process flow, high one-time pass rate, and process simple effect

Inactive Publication Date: 2006-11-22
SHANGHAI XINGHUA ARTWORK HANDWRITING&PAINTING ENGRAVING&PRINTING
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0027] (1) Since the green sheet to be pressed is relatively thin and brittle in the forming of the green sheet, it is troublesome to operate, and if a little careless, the green sheet is prone to defects and breaks
[0028] (2) In the overall combination, it is difficult to bond the sintered and metallized green sheets into a whole and to have good sealing performance, and its shock resistance and thermal shock resistance are relatively poor
If re-sintering is carried out again, although it is possible to sinter well into a whole, the cost will increase accordingly

Method used

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  • Method for fabricating sheet oxygen sensor
  • Method for fabricating sheet oxygen sensor
  • Method for fabricating sheet oxygen sensor

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Embodiment Construction

[0040] The present invention adopts three-layer integral sintering method, and concrete operation is:

[0041] 1. Make a slurry: Add 20% polyvinyl alcohol binder to the yttrium-added zirconia ceramic powder and stir to form a paste, and let it stand for 1 to 2 hours.

[0042]2. Rolling film: Set the rolling film thickness before rolling the film. After setting, do not adjust it arbitrarily to avoid uneven rolling film thickness. Slowly pour the jelly between the two rollers of the film rolling machine to roll the film. At the beginning of film rolling, the film rolling speed is relatively slow because the ceramic powder is prepared into a slurry. In order to speed up the film rolling speed, the film rolling roller can be heated, but the heating temperature should not be too high, generally controlled at 30°C. Heating while rolling the film like this, when the paste begins to not completely bond on the rolling film stick, and sticks together in sheet form, stop heating. Knea...

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Abstract

The disclosed manufacture method for a sheet-form oxygen sensor to control the air/fuel ratio in vehicle engine comprises: preparing slurry by Yb-added zirconia ceramic to obtain smooth thin plate by a rolling die, then using a punch to prepare thin slice, using a cutter to manufacture sensing slice, air-dust slice and heating slice; coating electrode on the sensing slice and heating resistance on heating slice, stitching three slices into sheet-form oxygen sensor, and finally, sintering at 1500Deg. This invention is simple and low cost, and has high one-time percent of pass.

Description

1. Technical field: [0001] The invention relates to a manufacturing method of an oxygen sensor, in particular discloses a manufacturing method of a sheet-type oxygen sensor, which is applied to an automobile engine to control the exhaust emission of the air-fuel ratio. 2. Background technology: [0002] With the development of automobile industry technology and people's attention to the environmental impact of automobile exhaust emissions, people use the three-way catalytic converter (TWC) to convert the environmentally harmful gas produced by the engine due to incomplete combustion of fuel into harmless gas. But an efficient three-way catalytic converter requires the stoichiometric air-fuel ratio (A / F) to be controlled within a narrow range (14.6±0.2). This requires the use of oxygen sensors to monitor the exhaust gas emitted by the car to control the air-fuel ratio of the engine. Oxygen sensors currently used in automobiles include ion-conductive concentration cell-type ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/407
Inventor 张纪才胡子文江静霞
Owner SHANGHAI XINGHUA ARTWORK HANDWRITING&PAINTING ENGRAVING&PRINTING
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