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Leadless platinum electrode slurry and manufacturing method thereof

An electrode slurry, lead-platinum technology, applied in conductive coatings, material analysis by electromagnetic means, material analysis, etc., can solve the problems of pollution, reduce the catalytic activity of platinum electrodes, etc., to enhance catalytic activity, improve adhesion and electrical performance, stable performance

Inactive Publication Date: 2008-04-30
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the use of this slurry has caused great pollution to the environment. For oxygen sensors, the presence of lead also reduces the catalytic activity of platinum electrodes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of lead-free platinum electrode slurry (100g), its manufacturing process is as follows:

[0040] 1. Lead-free glass binder formula (prepared 100g): SiO 2 10g, B 2 o 3 10g, Bi 2 o 3 60g, Al 2 o 3 5g, ZnO4g, CaO3g, ZrO 2 3g.

[0041] 2. Glass melting and ball milling process: Weigh the material according to the above weight, grind and mix it in the grinding tank for 10 minutes, place it in a platinum crucible, heat it in a muffle furnace to 1300 ° C, hold it for 30 minutes, and quench it in high-purity water to obtain fine glass. Glass particles, the glass particles are pulverized with a planetary ball mill for 4 hours, and the particle size is less than 10 μm.

[0042] 3. The shape of ultrafine platinum powder is spherical or polycrystalline dendritic, the average particle size is 0.4μm, and the bulk density is 1.1g / cm 3 .

[0043] 4. Preparation of organic binder (preparation 100g)

[0044] Weigh 10 g of ethyl cellulose, 70 g of terpineol, 15 g of cast...

Embodiment 2

[0054] A kind of lead-free platinum electrode slurry (100g), its production process is as follows:

[0055] 1. Lead-free glass binder formula (prepared 100g): SiO 2 5g, B 2 o 3 15g, Bi 2 o 3 50g,Al 2 o 3 1g, ZnO8g, CaO5g, ZrO 2 lg,TiO 2 5g.

[0056] 2. Glass melting and ball milling process: Weigh the material according to the above weight, grind and mix it in the grinding tank for 10 minutes, place it in a platinum crucible, heat it in a muffle furnace to 1350 ° C, keep it for 30 minutes, and quench it in high-purity water to obtain fine glass. Glass particles, the glass particles are pulverized with a planetary ball mill for 4 hours, and the particle size is less than 10 μm.

[0057] 3. The shape of ultrafine platinum powder is spherical and polycrystalline dendritic, the average particle size is 0.4μm, and the bulk density is 1.1g / cm 3 .

[0058] 4. Preparation of organic binder (preparation 100g)

[0059] Weigh 5g of ethyl cellulose, 10g of polyvinyl butyral, 5...

Embodiment 3

[0069] A kind of lead-free platinum electrode paste binding agent (100g), its production process is as follows:

[0070] 1. Lead-free glass binder formula (prepared 100g): SiO 2 15g, B 2 o 3 5g, Bi 2 o 3 78g, Al 2 o 3 8g, ZnO1g, MgO1g, MnO 2 1g,TiO 2 1g.

[0071] 2. Glass melting and ball milling process: Weigh the material according to the above weight, grind and mix it in the grinding tank for 10 minutes, place it in a platinum crucible, heat it in a muffle furnace to 1400 ° C, hold it for 30 minutes, and quench it in high-purity water to obtain fine glass. Glass particles, the glass particles are pulverized with a planetary ball mill for 4 hours, and the particle size is less than 10 μm.

[0072] 3. The shape of ultrafine platinum powder is spherical and polycrystalline dendritic, the average particle size is 0.4μm, and the bulk density is 1.1g / cm 3 .

[0073] 4. Preparation of organic binder (preparation 100g)

[0074] Weigh 5 g of ethyl cellulose, 10 g of nitr...

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Abstract

The invention relates to a leadless platinum electrode slurry and process for preparation, wherein the platinum electrode slurry is prepared from 2-10mass% leadless glass adhesive, 2-10mass% metal oxide, 10-20mass% organic adhesive, and ultra-fine platinum powder at left amount. The production comprises leadless glass adhesive preparation, organic adhesive preparation, leadless platinum electrode slurry formulation, and slurry treatment. The invention can produce leadless platinum electrode slurry which lead content is lower than 100ppm, while the slurry applied in the electrode of zirconium oxide oxygen sensor can sinter at 1200DEG C, and via the formula adjustment of the leadless glass adhesive, the invention can produce platinum electrode slurry which can sinter at 800-1500DEG C. The electrode has the advantages of strong zirconium oxide substrate adhesive force, high conductivity, and stable electrical property.

Description

technical field [0001] The invention relates to a lead-free platinum electrode slurry and a manufacturing method thereof. In particular, it relates to a lead-free platinum electrode slurry which can be sintered at 1200 DEG C and a preparation method thereof, and the slurry is used as a burn-in electrode of a zirconia-type oxygen sensor. By brushing or screen printing, the slurry is evenly attached to the surface of the zirconia oxygen sensor, and by drying, sintering and other processes, an excellent catalytic electrode layer (platinum electrode) is formed on the surface of the sensor to make the sensor perform excellent catalytic and electrical properties. Background technique [0002] Zirconia solid electrolyte oxygen sensors (hereinafter referred to as oxygen sensors) are widely used in automobile exhaust emission control systems. The control system consisting of an oxygen sensor and a three-way catalyst can greatly reduce the harmful emissions produced by the engine an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/24C09D5/24C09J9/02G01N27/409
Inventor 贺昕陈峤熊晓东张曦王胜国吴聪李茂良李治宇梁敬博
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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