Chip and two-way series sheet type oxygen sensor including such chip

An oxygen sensor and chip technology, applied in instruments, scientific instruments, electrical solid devices, etc., can solve the problems of long working temperature, narrow detection range, cumbersome process, etc., and achieve the effect of fast response, compact and solid structure, and reduced volume.

Active Publication Date: 2006-08-23
GCI SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Assembling the two together into an oxygen sensor, since the ZrO2-based electrolyte matrix, platinum electrode, porous layer, etc. are made into tubular elements through multiple firing processes, the process of combining the two parts into an oxygen sensor is cumbersome, reaching long working temperature
The detection range is narrow, and it can only detect the oxygen concentration near the theoretical air-fuel ratio
And due to structural reasons, ZrO 2 The base electrolyte matrix and the platinum electrode are in contact with heat transfer, and the response is slow

Method used

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  • Chip and two-way series sheet type oxygen sensor including such chip
  • Chip and two-way series sheet type oxygen sensor including such chip
  • Chip and two-way series sheet type oxygen sensor including such chip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] like figure 1 As shown, a chip of bidirectional series chip oxygen sensor, it includes:

[0042] A current-limiting oxygen sensor 1, which is composed of a platinum electrode 13 printed on both surfaces of a zirconia electrolyte membrane 11 of a current-limiting oxygen sensor, and a platinum electrode 13 covered with a porous membrane 12;

[0043] A concentration cell type oxygen sensor 2, which is composed of a platinum electrode 23 printed on both surfaces of a concentration cell type zirconia electrolyte membrane 22,

[0044] A heating element 3, which is attached to the outside of the platinum electrode 21 of the concentration cell type oxygen sensor;

[0045] A sealed cavity 4, which is located on the three sides between the limiting current sensor 1 and the concentration battery sensor 2;

[0046] A cavity 5, which is surrounded by the limiting current type oxygen sensor 1, the concentration cell type oxygen sensor 2 and the sealed cavity 4;

[0047] The limiti...

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Abstract

This invention relates to chips of two-way serial sheet oxygen sensors for testing oxygen concentration in car tail-gas including: a limit current oxygen sensor, a concentration cell oxygen sensor, a heater, a sealed cavity, a cavity, in which, said limit current oxygen sensor, the concentration cell oxygen sensor, the heater and the sealed cavity are static-pressed to molding to be sintered to an entity. This invention also relates to the two-way serial sheet oxygen sensors and the chip is composed of a limit current oxygen sensor, concentration cell oxygen sensor to integrate ZrO< 2 > electrolyte, a porous film, a heater and a porous Pt electrode as one.

Description

Technical field [0001] The invention relates to a chip of an oxygen sensor, in particular to a chip of a two-way serial chip oxygen sensor used for measuring the oxygen concentration in automobile exhaust gas; the present invention also relates to the bidirectional serial chip oxygen sensor. Background technique [0002] The automotive oxygen sensor detects the oxygen concentration in the exhaust gas and is controlled by the feedback of the electronic control system to adjust the air-fuel ratio of the automotive engine. This is of great significance for improving fuel utilization and reducing emissions of polluting gases. The traditional voltage-type oxygen sensor has a tubular structure, and its manufacturing process is: first, forming and firing a ZrO2-based electrolyte matrix, then coating and firing a Pt electrode, performing plasma sputtering or chemical impregnation on it, and firing a porous layer; secondly, Make heating elements. Assembling the two together into an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/28G01N27/409H01L49/00
Inventor 江涛江丽君魏群李艳
Owner GCI SCI & TECH
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