Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Oxygen sensor electrode, concentration-difference type oxygen sensor with oxygen sensor electrode, and preparation method for same

An oxygen sensor and electrode technology, which is applied in the field of automotive sensors, can solve the problems of poor bonding between electrodes and zirconia solid electrolytes, reduced electrode overburning catalytic performance, and low catalytic performance of oxygen sensor electrodes, and achieves good current conductivity and platinum content. The effect of high, response rate improvement

Active Publication Date: 2013-07-03
BYD CO LTD
View PDF6 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of the low catalytic ability of the oxygen sensor electrode in the prior art, the poor combination of the electrode and the zirconia solid electrolyte, and the co-firing of the electrode and the zirconia solid electrolyte, the catalytic performance of the electrode is easily reduced when the electrode is over-fired. Oxygen sensor electrode, concentration-type oxygen sensor with the electrode and preparation method thereof

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Oxygen sensor electrode, concentration-difference type oxygen sensor with oxygen sensor electrode, and preparation method for same
  • Oxygen sensor electrode, concentration-difference type oxygen sensor with oxygen sensor electrode, and preparation method for same
  • Oxygen sensor electrode, concentration-difference type oxygen sensor with oxygen sensor electrode, and preparation method for same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The present invention provides a preparation method of the oxygen sensor with the electrode structure of the present invention by taking the concentration difference type chip oxygen sensor as an example, and the method includes the following steps.

[0034] (1) Prepare the green body of the heating unit, the reference gas substrate and the zirconia solid electrolyte substrate.

[0035] First, take a heater substrate, apply insulating layer slurry, heating electrode slurry, and insulating layer slurry on the heater substrate accordingly, and dry to obtain a heating unit green body;

[0036] Prepare a reference gas substrate green body, the reference gas substrate green body is provided with a reference gas channel, and the reference gas channel can be formed by die punching, laser cutting and other processes;

[0037] Prepare the zirconia solid electrolyte matrix green body of the oxygen measuring unit;

[0038] In the preparation method of the green body of the oxygen...

Embodiment 1

[0051] (1) Prepare the green body of the heating unit of the chip oxygen sensor, the reference gas substrate and the zirconia solid electrolyte substrate.

[0052] (2) Prepare the green body of the oxygen measuring unit.

[0053] a. Electrode slurry organic system preparation: Take 10g of ethyl cellulose, stir it into 85g of terpineol, stir in 80°C water bath until completely dissolved. Cool the terpineol solution of ethyl cellulose above to room temperature, add 2g of dispersant, 2g of leveling agent, and 1g of defoamer, and stir until completely miscible.

[0054] b. Catalytic reaction layer slurry preparation: take 7.5g of high-purity platinum powder, 10.5g of aluminum oxide powder, 1g each of cerium oxide powder, rhodium oxide powder, and lanthanum oxide powder, and 80g of zirconia powder until uniformly mixed to obtain catalytic reaction layer powder System: Take 50 g of catalytic reaction layer powder, stir and add 50 g of the organic system prepared in step a, three-ro...

Embodiment 2

[0059] (1) The heating unit of the chip oxygen sensor, the reference gas substrate and the green body of the zirconia solid electrolyte substrate prepared in step (1) of Example 1 are used.

[0060] (2) Prepare the green body of the oxygen measuring unit.

[0061] a. Organic system preparation: The organic system was prepared by adopting the scheme of step a in Example 1.

[0062] b. Catalytic reaction layer slurry preparation: take 5g of high-purity platinum powder, 5g of aluminum oxide powder, 2g of cerium oxide powder, 2g of rhodium oxide powder, 1g of lanthanum oxide powder, and 85g of zirconia powder until uniformly mixed to obtain catalytic reaction layer powder system. Take 30 g of catalytic reaction layer powder, stir and add 70 g of the organic system prepared in step a, three-roll grinding for 2 hours, and use a scraper fineness meter to check that the particle size of the slurry is less than 1 μm, and the catalytic reaction layer slurry is obtained.

[0063] c. Pr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
widthaaaaaaaaaa
Login to View More

Abstract

The invention provides an oxygen sensor electrode. The electrode is of a double-layer structure, and comprises a catalytic reaction layer and a flow-collecting layer, wherein the catalytic reaction layer has a high ceramic proportioning ratio, platinum powder is uniformly distributed in ceramic powder, so that a three-phase boundary among zirconium oxide, the platinum powder and oxygen is maximized; and the flow-collecting layer has a high metal platinum proportioning ratio and a good conducting capacity. A forming process of co-sintering the electrode and a solid electrolyte can be adopted for the oxygen sensor with the electrode provided by the invention, thus saving production cost; and moreover, the catalytic reaction layer of the electrode is closely combined with the solid electrolyte and free from the phenomena of layering and cracking, and the reduction of the catalytic performance due to the reduction of the three-phase boundary caused by the overburning of the platinum powder in the catalytic reaction layer is avoided.

Description

technical field [0001] The invention belongs to the field of automobile sensors, in particular to an oxygen sensor for detecting the oxygen content in automobile exhaust. Background technique [0002] In the modern engine EFI system, the electronically controlled fuel supply unit, oxygen sensor and three-way catalytic converter are the core of the control system. The role of the oxygen sensor is to measure the oxygen concentration of the exhaust gas in real time, and feed back the signal to the control system to adjust the fuel injection quantity of the engine. [0003] The platinum electrode is one of the important components of the ceramic sensitive element of the oxygen sensor. At the operating temperature, oxygen undergoes a redox reaction of gaining and losing electrons in the micro-region of the three-phase interface electrode formed with the platinum electrode and zirconia. Under catalysis, it becomes oxygen ions, and the oxygen ions are transferred in the zirconia s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/409
Inventor 刘梦辉徐斌向其军
Owner BYD CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com