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A preparation method of a dual-battery chip wide-area oxygen sensor

An oxygen sensor and dual-battery technology, which is applied in the field of dual-battery chip wide-area oxygen sensor and its preparation, can solve the problems of air pollution by exhaust gas, changes in air concentration, influence on measurement accuracy, etc. The effect of thin, simplified preparation process

Active Publication Date: 2020-07-28
成都科锐传感技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a dual-cell type chip wide-area oxygen sensor and its preparation method, which is used to solve the problem that there is a large air cavity inside the traditional dual-cell type chip wide-area oxygen sensor in the prior art. The air concentration near the exhaust gas will change, and even the exhaust gas will pollute the air, affecting the measurement accuracy

Method used

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  • A preparation method of a dual-battery chip wide-area oxygen sensor
  • A preparation method of a dual-battery chip wide-area oxygen sensor

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Effect test

Embodiment 1

[0038] combined with figure 1 and figure 2 As shown, a double-battery chip wide-area oxygen sensor is sintered by stacking oxygen pumping battery 1, reference battery 2, structural layer 3 and heating layer 4 sequentially from top to bottom, wherein:

[0039] Oxygen pumping battery 1: a pump comprising a first zirconia casting substrate 16, an oxygen pumping external electrode 12 symmetrically arranged on the upper surface of the first zirconia casting substrate and a pump on the lower surface of the first zirconia casting substrate 16 An oxygen inner electrode 17, the oxygen pumping outer electrode 12 is covered with a porous protective layer 11, and the oxygen pumping outer electrode 12 is connected to the pin 13;

[0040]Reference cell 2: comprising a second zirconia cast substrate 22, a test electrode 21 and a reference electrode 24 arranged on the upper surface of the second zirconia cast substrate 22, the second zirconia cast substrate The lower surface of the sheet 2...

Embodiment 2

[0045] A method for preparing a dual-cell type chip wide-area oxygen sensor, comprising:

[0046] Step S1: Take 5mol% yttrium oxide doped zirconia, and configure inorganic components with alumina according to the mass percentage of 88:12, and add dispersant, organic Solvent, binder and plasticizer are ball milled to form zirconia ceramic slurry;

[0047] A zirconia casting substrate is prepared by a casting method, and a first zirconia casting substrate, a second zirconia casting substrate, a third zirconia casting substrate and a fourth zirconia casting substrate are obtained;

[0048] Use mechanical punching to punch positioning holes, electrode lead-out holes and heater lead-out holes;

[0049] Step S2: prepare oxygen pump electrode slurry, diffusion barrier slurry and porous protective layer slurry: mix platinum powder and carbon at a mass percentage of 88:12, and then add an organic solvent to prepare pump electrode slurry; mix zirconia, carbon Mixing at a mass percenta...

Embodiment 3

[0056] Step S1: Take 8mol% yttrium oxide doped zirconia, and configure inorganic components with alumina according to the mass percentage of 75:25, and add dispersant, organic Solvent, binder and plasticizer are ball milled to form zirconia ceramic slurry;

[0057] A zirconia casting substrate is prepared by a casting method, and a first zirconia casting substrate, a second zirconia casting substrate, a third zirconia casting substrate and a fourth zirconia casting substrate are obtained;

[0058] Use mechanical punching to punch positioning holes, electrode lead-out holes and heater lead-out holes;

[0059] Step S2: Prepare oxygen pump electrode slurry, diffusion barrier slurry and porous protective layer slurry: mix platinum powder and carbon at a mass percentage of 95:5, and then add an organic solvent to prepare pump electrode slurry; mix zirconia, carbon Mix at 50:50 by mass percentage, and then add an organic solvent to prepare a diffusion barrier slurry; mix zirconia a...

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Abstract

The invention discloses a novel double-battery type sheet wide-area oxygen sensor. The novel double-battery type sheet wide-area oxygen sensor is formed by laminating and sintering an oxygen pump battery, a reference battery, a structure layer and a heating layer, wherein the oxygen pump battery comprises a first zirconium oxide tape casting substrate, an oxygen pump outer electrode and an oxygenpump inner electrode; the reference battery comprises a second zirconium oxide tape casting substrate, a testing electrode and a reference electrode; a diffusion cavity is located between the first zirconium oxide tape casting substrate and the second zirconium oxide tape casting substrate; diffusion barriers are arranged at two sides of the diffusion cavity; the structure layer comprises a thirdzirconium oxide tape casting substrate; the heating layer comprises a fourth zirconium oxide tape casting substrate, a third insulation layer and a heater. The invention further provides a preparationmethod of the novel double-battery type sheet wide-area oxygen sensor; the preparation method comprises the following steps: preparing the zirconium oxide tape casting substrates by adopting a tape casting method; preparing the oxygen pump inner electrode, the oxygen pump outer electrode, the diffusion barriers and the diffusion cavity by adopting screen printing; then laminating in sequence andsintering. According to the novel double-battery type sheet wide-area oxygen sensor, an internal reference ratio of pump current is adopted so that changes of oxygen concentration of reference gas areavoided and the testing precision of the sensor is improved.

Description

technical field [0001] The invention relates to the technical field of oxygen sensors for automobiles, in particular to a double-battery chip type wide-area oxygen sensor and a preparation method thereof. Background technique [0002] With the further improvement of environmental protection and fuel saving requirements, the automobile exhaust emission standards are becoming more and more stringent, and the engine technology is also improving day by day. Therefore, the traditional concentration-type chip oxygen sensor will not be able to meet the requirements of automobile engine testing in terms of measurement range and measurement accuracy. system requirements. In this context, the third-generation wide-area oxygen sensor was born. The dual-battery chip wide-area oxygen sensor mainly includes an oxygen pump battery and a reference battery. There is a cavity between the oxygen pump battery and the reference battery, and the exhaust gas enters the cavity through diffusion. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/41
CPCG01N27/41
Inventor 黄涛包绍明李婷余苗
Owner 成都科锐传感技术有限公司
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