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Co-burning method for oxygen sensor electrolyte and palatinum electrode

A technology of oxygen sensor and platinum electrode, which is applied in the field of co-firing of electrolyte and platinum electrode, can solve the problems of cumbersome process, long time to reach the working temperature, slow response, etc., and achieve the effect of reduced volume, fast response and reduced power consumption

Active Publication Date: 2008-07-23
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, due to the ZrO 2 The base electrolyte matrix, platinum electrode, etc. are made into tubular elements through multiple firing processes, and the two parts are combined into an oxygen sensor. The process is cumbersome, and ZrO 2 The base electrolyte matrix and the platinum electrode are contact heat transfer, the response is slow, and it takes a long time to reach the working temperature

Method used

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  • Co-burning method for oxygen sensor electrolyte and palatinum electrode
  • Co-burning method for oxygen sensor electrolyte and palatinum electrode
  • Co-burning method for oxygen sensor electrolyte and palatinum electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] By weight percentage, 55% doped Y 8mol% ZrO 2 Base electrolyte and 45% polyvinyl alcohol binder ingredients are ball milled, cast into a 0.15mm film, and superimposed into 5 layers, isostatically pressed into a laminated film, and cut according to the designed size; the platinum electrode slurry The composition in weight percent is 71.8% of Pt, 28% of binder (30% of ethyl cellulose and 70% of terpineol), and 0.2% of glass to make platinum electrode slurry. Make a printing screen according to the size of the electrode, and use a thick film process to print the platinum electrode on the laminated diaphragm. The thickness of the platinum electrode is 50-150um. Cut the diaphragm according to the size of the oxygen sensor, degrease, and burn to 1560°C , heat preservation for 4 hours, the two are combined into a whole.

[0023] Take the sample prepared by co-firing the electrolyte of the oxygen sensor prepared by the above method and the platinum electrode and observe the el...

Embodiment 2

[0025] By weight percentage, 50% doped Y 5mol% ZrO 2 Base electrolyte and 50% polyvinyl alcohol binder ingredients are ball milled, cast into a 0.10mm film, and superimposed into 6 layers, isostatically pressed into a laminated film, and cut according to the designed size; the platinum electrode slurry The composition in weight percentage is 85% of Pt, 15% of binder (components are 20% of ethyl cellulose and 80% of terpineol) to make platinum electrode slurry. Make a printing screen according to the size of the electrode, and use a thick film process to print the platinum electrode on the laminated diaphragm. The thickness of the platinum electrode is 50-120um. Cut the diaphragm according to the size of the oxygen sensor, degrease, and burn to 1600°C , heat preservation for 2 hours, the two are combined into a whole.

[0026] Tested according to the method of Example 1, the electrode structure of the sample was observed under an electron microscope SEM, a porous network was s...

Embodiment 3

[0028] By weight percentage, 60% Y-doped 10mol% ZrO2-based electrolyte and 40% butyral binder ingredients are ball milled, cast into a 0.20mm film, and stacked into 3 layers, isostatically pressed into a stack Layer diaphragm, cut according to design size; The weight percentage of platinum electrode slurry is composed of 65% Pt, 33% binder (the composition is 40% ethyl cellulose and 60% terpineol), 2% glass made of platinum electrode paste. Make a printing screen according to the size of the electrode, and use a thick film process to print the platinum electrode on the laminated diaphragm. The thickness of the platinum electrode is 80-150um. Cut the diaphragm according to the size of the oxygen sensor, degrease, and burn to 1500°C , heat preservation for 6 hours, the two are combined into a whole.

[0029] Tested according to the method of Example 1, the electrode structure of the sample was observed under an electron microscope SEM, a porous network was seen, and the electri...

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Abstract

This invention discloses a co-burning method for oxygen sensor electrolyte and Pt electrode including the following steps: A, matching materials according to 50-60% ZrO< 2 > base electrolyte of the weight percentage and 40-50% adhesive, grinding and doctor-blading gels to be bladed to 0.1-0.2mm films on a doctor-blading machine to be laminated to 3-6 layers to be equal-static pressed to lamination films to be cut according to sizes, B, matching materials of 65-85% Pt powder, 15-35% bond and 0-2% glass powder to be mixed to a Pt electrode slurry, C, processing printed silk net to print the Pt electrode slurry by step B on the laminated layer film, the Pt electrode is 50-150mum thick to be cut according to the size of the oxygen sensor the gel is blown out and sintered under 1500-1600deg.C for 2-6 hours to integrate the two into one.

Description

Technical field [0001] The invention relates to a co-firing method for an electrolyte of an oxygen sensor and a platinum electrode. Background technique [0002] Most of the existing oxygen sensors for automobiles are tubular structures, and the manufacturing process is as follows: first, molding and firing ZrO 2 Base electrolyte matrix, then coated with fired Pt electrode, plasma sputtering or chemical impregnation on it, and fired porous layer; secondly, make heating elements. Assembling the two together into an oxygen sensor, due to the ZrO 2 The base electrolyte matrix, platinum electrode, etc. are made into tubular elements through multiple firing processes, and the two parts are combined into an oxygen sensor. The process is cumbersome, and ZrO 2 The base electrolyte matrix and the platinum electrode are contact heat transfer, the response is slow, and it takes a long time to reach the working temperature. Contents of the invention [0003] The technical problem t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/409G01N27/28H01L49/00H10N99/00
Inventor 魏群江涛李艳江丽君
Owner GCI SCI & TECH
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