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Lead-free silver electrode size and preparation method thereof

An electrode paste, lead-silver technology, applied in conductive materials, conductive coatings, conductive materials and other directions, can solve the problems of poor ceramic wettability, low electrode adhesion, high melting point, and achieve excellent adhesion, improved adhesion, Good electrical performance

Inactive Publication Date: 2009-12-23
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

However, the melting point of ordinary lead-free glass frit is generally high, and the wettability with ceramics is not good, so that the adhesion of the electrode is very small.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A kind of lead-free silver electrode slurry (100g), its production process is as follows:

[0052] 1. Lead-free glass binder formula (prepared 100g): SiO 2 10g, B 2 o 3 11g, Bi 2 o 3 66g, Al 2 o 3 7g, ZnO 4.5g, ZrO 2 1.5g.

[0053] 2. Glass melting and ball milling process: Weigh the materials according to the above weight, grind and mix them in the grinding tank for 10 minutes, place them in a platinum crucible, heat them in a muffle furnace to 1300 ° C, hold for 60 minutes, and quench them in high-purity water to obtain fine particles. Glass particles, the glass particles are pulverized with a star ball mill for 8 hours, and the average particle size is less than 10 μm.

[0054] 3. The appearance of ultrafine silver powder is spherical and flaky, the average particle size is 0.4μm, and the bulk density is 1.1g / cm 3 .

[0055] 4. Preparation of organic binder (preparation 100g)

[0056] Weigh 10 g of ethyl cellulose, 70 g of terpineol, 15 g of castor oi...

Embodiment 2

[0066] A kind of lead-free silver electrode slurry (100g), its production process is as follows:

[0067] 1. Lead-free glass frit formula (preparation 100g): SiO 2 10g, B 2 o 3 13g, Bi 2 o 3 64g, Al 2 o 3 6g, ZnO 5g, ZrO 2 2g.

[0068] 2. Glass melting and ball milling process: Weigh the materials according to the above weight, grind and mix them in the grinding tank for 10 minutes, place them in a platinum crucible, heat them in a muffle furnace to 1500°C, hold for 30 minutes, and quench them in high-purity water to obtain fine particles. Glass particles, the glass particles are pulverized with a planetary ball mill for 4 hours, and the particle size is less than 10 μm.

[0069] 3. The shape of ultra-fine silver powder is spherical and flake, the average particle size is 0.4μm, and the bulk density is 1.1g / cm 3 .

[0070] 4. Preparation of organic binder (preparation 100g)

[0071] Weigh 15g of polyvinyl butyral, 60g of turpentine, 15g of castor oil, and 10g of...

Embodiment 3

[0081] A kind of lead-free silver electrode slurry (100g), its production process is as follows:

[0082] 1. Formulation of lead-free glass frit (prepared 100g): SiO 2 5g, B 2 o 3 15g, Bi 2 o 3 67g, Al 2 o 3 8g, ZnO 4g, ZrO 2 1g.

[0083] 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 1500 ° 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.

[0084] 3. The shape of ultra-fine silver powder is spherical and flake, the average particle size is 0.4μm, and the bulk density is 1.1g / cm 3 .

[0085] 4. Preparation of organic binder (preparation 60g)

[0086] Weigh 1g of nitrocellulose, 1g of rosin, 38g of turpentine, 10g of castor oil, and 10...

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Abstract

The invention relates to a lead-free silver electrode size and a preparation method thereof. The invention is characterized in that the size comprises the following compositions in portion by weight: 60 to 75 weight portions of ultrafine silver powder, 2 to 10 weight portions of lead-free glass binder, 2 to 5 weight portions of oxide and 10 to 30 weight portions of organic binder. The lead-free silver electrode size can completely replace a conventional leaded glass size; and the lead-free silver electrode size can be fused through sintering at a temperature of 600 DEG C and has good fluidity, can be wetted with a ceramic substrate and shows stable performance and good electric performance.

Description

technical field [0001] The invention relates to a lead-free silver electrode paste and a preparation method thereof, in particular to a lead-free silver electrode paste which can be used as a conductive electrode on a glass or ceramic substrate and a preparation method thereof. Background technique [0002] The silver electrode paste is prepared and processed from raw materials such as ultrafine silver powder, glass binder, organic binder and additives. The ultrafine silver powder plays a conductive role in the electrode; the glass binder melts during sintering, and the metal conductive powder is attached to the surface of the substrate to form a uniform conductive film with a thickness of 10-12 μm; the organic carrier plays a role of dispersion, and at the same time Make the slurry have a certain fluidity, thixotropy, etc., and make the slurry a relatively stable suspension, which can be placed for a long time without precipitation; the function of the additive is to improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/00H01B13/00C09D5/24
Inventor 贺昕陈峤张曦陈斐吴聪李茂良梁敬博
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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