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Co-burning method for oxygen sensor electrolyte and porous film

An oxygen sensor and porous membrane technology, applied in the field of co-firing of electrolyte and porous membrane of oxygen sensor, can solve problems such as complicated process, and achieve the effect of avoiding cracking or deformation

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 basic electrolyte matrix, platinum electrode, porous layer, etc. are made into tubular elements through multiple firing processes, and the two parts are combined into an oxygen sensor. The process is cumbersome.

Method used

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  • Co-burning method for oxygen sensor electrolyte and porous film
  • Co-burning method for oxygen sensor electrolyte and porous film
  • Co-burning method for oxygen sensor electrolyte and porous film

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A method for co-firing an electrolyte and a porous membrane of an oxygen sensor, comprising the steps of:

[0040] (1) The porous membrane material is prepared by weight percentage of bone material 95%, pore-forming material graphite powder 5%, mixed and refined by ball milling, and the weight ratio of porous membrane material:solvent is 1:1.2 plus water+ethanol solvent , ball milled to make porous membrane material powder;

[0041] (2) 55% by weight of the porous membrane material powder, 45% of the polyvinyl alcohol binder, ball milled and mixed for 20 hours to make a slurry, and cast into a porous membrane material diaphragm whose film thickness is 180um;

[0042] (3) 55% ZrO by weight percentage 2 Base electrolyte material, 45% polyvinyl alcohol binder proportioning ingredients, ball mill casting slurry, cast on a casting machine to form a film with a film thickness of 0.15mm, and superimpose into 4 layers, isostatic pressing into Laminated diaphragm, cut accordin...

Embodiment 2

[0059] A method for co-firing an electrolyte and a porous membrane of an oxygen sensor, comprising the steps of:

[0060] (1) Prepare the porous membrane material with 90% bone material and 10% graphite powder as the pore-forming material by weight percentage, mix and refine through ball milling, add water+ethanol solvent according to the weight ratio of porous membrane material:solvent is 1:1.1 , ball milled to make porous membrane material powder;

[0061] (2) 60% by weight of the porous membrane material powder and 40% of the polyvinyl alcohol binder were mixed by ball milling for 24 hours to make a slurry, and cast into a porous membrane material diaphragm with a film thickness of 300um;

[0062] (3) 60% ZrO by weight percentage 2 Base electrolyte material, 40% polyvinyl alcohol binder proportioning ingredients, ball mill casting slurry, cast on a casting machine to form a film with a film thickness of 0.10mm, and stack it into 6 layers, and isostatically press it into a ...

Embodiment 3

[0070] A method for co-firing an electrolyte and a porous membrane of an oxygen sensor, comprising the steps of:

[0071] (1) The porous membrane material is formulated with 98% of the bone material and 2% of the pore-forming graphite powder in percentage by weight, mixed and refined by ball milling, and the weight ratio of the porous membrane material: solvent is 1: 1.4 plus ethanol solvent, Ball milling to make porous membrane material powder;

[0072] (2) 50% by weight of the porous membrane material powder, 50% of the butyral binder, ball milled and mixed for 15 hours to make a slurry, and cast into a porous membrane material diaphragm with a film thickness of 50um;

[0073] (3) ZrO 2 Platinum electrodes are printed on the diaphragm of the base electrolyte material;

[0074] (4) 50% ZrO by weight percentage 2 Base electrolyte material, 50% polyvinyl alcohol binder proportioning ingredients, ball mill casting slurry, cast on a casting machine to form a membrane with a fi...

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Abstract

This invention discloses a co-burning method for electrolyte and porous films of an oxygen sensor including the following steps: 1, matching the porous film materials according to the weight percentage of 90-98% bone material and 2-10% holing materials to be grinded and fined, adding a solvent according to the proportion of porous film : solvent =1:1.1-1.4 to be grinded and prepared to the powder, 2, grinding and mixing the powder and an adhesive for 15-24 hours to a slurry to be bladed to films, 3, blading the slurry into films, 4, printing Pt electrode on the films, 5, equal-static pressing to molding to the films in step 2 onto the films printed with Pt electrode material with the pressure of 3-10MPa to be cut into limit current sensor ingots, 6, burning the ingots in a SiMo column furnace.

Description

Technical field [0001] The invention relates to the field of oxygen sensors for automobiles, in particular to a method for co-firing electrolytes and porous membranes of oxygen sensors. 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 basic electrolyte matrix, platinum electrode, porous layer, etc. are made into tubular elements through multiple firing processes, and the two parts are combined into an oxygen sensor, and the process is cumbersome. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method of co-firing the electrolyte of the oxyge...

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 李艳魏群江涛江丽君
Owner GCI SCI & TECH