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Silver paste formula for improving silver paste manufacturability and silver layer density and preparation process

A technological and dense technology, applied in cable/conductor manufacturing, conductive materials dispersed in non-conductive inorganic materials, electrical components, etc., can solve problems such as poor quality of ceramic filters, to ensure uniformity of film thickness, Effect of improving compactness and improving electrical properties

Active Publication Date: 2021-02-02
上海大洲电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing silver paste for filters cannot meet the higher density of the silver layer required by the existing ceramic filters, and the quality of the ceramic filters is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A silver paste formula to improve the processability of silver paste and the density of silver layer, including 60% of spherical silver powder with D50=1-3μm, 15% of flake silver powder with D50=2-4μm, 3% of organic silver, and 3% of glass powder %, ethyl cellulose 7%, auxiliary agent 1%, solvent 11%, described organic silver is a kind of silver acetate, silver butyrate, and described solvent is a kind of butyl carbitol, terpineol.

[0015] A silver paste preparation process for improving silver paste manufacturability and silver layer density, specifically comprising the following steps:

[0016] Step 1: According to the raw material percentage of the silver paste formulation to improve the silver paste manufacturability and silver layer density, take 11% of solvent and 7% of ethyl cellulose, heat the solvent to 60°C, slowly add ethyl cellulose, and Stir again and dissolve under 50rpm, make the final liquid appear clear and transparent, and make intermediate products; ...

Embodiment 2

[0019] A silver paste formula to improve the processability of silver paste and the density of silver layer, including 65% of spherical silver powder with D50=1-3μm, 12% of flake silver powder with D50=2-4μm, 3% of organic silver, and 3% of glass powder %, ethyl cellulose 7%, auxiliary agent 1%, solvent 9%, the organic silver is a kind of silver acetate, silver butyrate, and the described solvent is a kind of butyl carbitol, terpineol.

[0020] A silver paste preparation process for improving silver paste manufacturability and silver layer density, specifically comprising the following steps:

[0021] Step 1: Take 9% of solvent and 7% of ethyl cellulose according to the raw material percentage of the silver paste formula to improve the manufacturability of silver paste and the density of silver layer, heat the solvent to 60°C, slowly add ethyl cellulose, and Stir again and dissolve under 50rpm, make the final liquid appear clear and transparent, and make intermediate products;...

Embodiment 3

[0024] A silver paste formula to improve the processability of silver paste and the density of silver layer, including 70% of spherical silver powder with D50=1-3μm, 10% of flake silver powder with D50=2-4μm, 3% of organic silver, and 3% of glass powder %, ethyl cellulose 5%, auxiliary agent 1.5%, solvent 8%, described organic silver is a kind of silver acetate, silver butyrate, and described solvent is a kind of butyl carbitol, terpineol.

[0025] A silver paste preparation process for improving silver paste manufacturability and silver layer density, specifically comprising the following steps:

[0026] Step 1: Take 8% of solvent and 5% of ethyl cellulose according to the raw material percentage of the silver paste formula to improve the manufacturability of silver paste and the density of silver layer, heat the solvent to 60°C, slowly add ethyl cellulose, and Stir again and dissolve under 50rpm, make the final liquid appear clear and transparent, and make intermediate produ...

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Abstract

The invention provides a silver paste formula for improving silver paste manufacturability and silver layer density. The silver paste formula comprises silver powder, glass powder, an organic matter,a solvent and an auxiliary agent. The specific formula is prepared from the following raw materials in percentage by weight: 70%-80% of silver powder, 1%-5% of glass powder, 3%-5% of organic matter, 5%-15% of solvent and 1%-5% of auxiliaries. The silver powder comprises 70%-80% of spherical silver powder, 10%-20% of flaky silver powder and 1%-5% of organic silver, and the organic matter is ethyl cellulose with different molecular weights. The silver paste can be used for silver spraying and silver dipping processes, and by adding a large proportion of spherical silver powder, in the silver spraying process, the atomization characteristic of a product in the silver spraying process is improved, the film thickness uniformity and flatness are improved, and the abrasion degree of the silver paste to a nozzle is reduced.

Description

technical field [0001] The invention relates to the technical field of silver paste, in particular to a silver paste formula and a preparation process for improving the manufacturability of silver paste and the density of silver layer. Background technique [0002] The electrical performance of ceramic filters has always been an important performance index in this industry. This index is not only related to the electrical performance parameters of the ceramic powder itself, but also related to the electrical performance of the silver paste after metallization; as the filter electrical performance requirements are getting higher and higher , It also puts forward higher requirements for the electrical properties of the silver paste after sintering, and the density of the silver layer is the decisive factor for the electrical properties. However, the existing silver paste for filters cannot meet the higher density of the silver layer required by the existing ceramic filters, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/16H01B1/22H01B13/00
CPCH01B1/16H01B1/22H01B13/00Y02E10/50
Inventor 程海明刘高盛房基寿
Owner 上海大洲电子材料有限公司
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