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A silver paste formulation and preparation process for improving the manufacturability of silver paste and the density of silver layer

A technological and dense technology, applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, electrical components, etc., can solve the problems of poor quality of ceramic filters, etc. The effect of improving the activity of silver powder and improving the compactness

Active Publication Date: 2022-07-12
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 for improving the manufacturability of silver paste and the density of silver layer, comprising 60% of spherical silver powder with D50=1-3 μm, 15% of flake silver powder with D50=2-4 μm, 3% of organic silver, and 3% of glass powder %, ethyl cellulose 7%, auxiliary agent 1%, solvent 11%, the organic silver is one of silver acetate and silver butyrate, and the solvent is one of butyl carbitol and terpineol.

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

[0016] Step 1: According to the raw material percentage of the silver paste formula to improve the manufacturability of silver paste and the density of silver layer, take 11% solvent and 7% ethyl cellulose, heat the solvent to 60°C, slowly add ethyl cellulose, Stir and dissolve at 50 rpm, so that the final liquid is clear and transparent, and the intermediate product is ma...

Embodiment 2

[0019] A silver paste formula for improving the manufacturability of silver paste and the density of silver layer, comprising 65% of spherical silver powder with D50=1-3 μm, 12% of flake silver powder with D50=2-4 μm, 3% of organic silver, and 3% of glass powder %, ethyl cellulose 7%, auxiliary agent 1%, solvent 9%, the organic silver is one of silver acetate and silver butyrate, and the solvent is one of butyl carbitol and terpineol.

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

[0021] Step 1: According to the raw material percentage of the silver paste formula to improve the manufacturability of silver paste and the density of silver layer, take 9% solvent and 7% ethyl cellulose, heat the solvent to 60°C, slowly add ethyl cellulose, Stir and dissolve at 50 rpm, so that the final liquid is clear and transparent, and the intermediate product is made...

Embodiment 3

[0024] A silver paste formula for improving the manufacturability of silver paste and the density of silver layer, comprising 70% of spherical silver powder with D50=1-3 μm, 10% of flake silver powder with D50=2-4 μm, 3% of organic silver, and 3% of glass powder %, ethyl cellulose 5%, auxiliary agent 1.5%, solvent 8%, the organic silver is one of silver acetate and silver butyrate, and the solvent is one of butyl carbitol and terpineol.

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

[0026] Step 1: According to the raw material percentage of the silver paste formula to improve the manufacturability of the silver paste and the density of the silver layer, take 8% of the solvent and 5% of ethyl cellulose, heat the solvent to 60 ° C, slowly add ethyl cellulose, Stir and dissolve at 50 rpm, so that the final liquid is clear and transparent, and the interm...

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Abstract

The invention provides a silver paste formula for improving the manufacturability of the silver paste and the density of the silver layer, including: silver powder, glass powder, organic matter, solvent and auxiliary; %, glass powder 1%-5%, organic matter 3%-5%, solvent 5%-15%, auxiliary 1%-5%; the silver powder includes: spherical silver powder 70%-80%, flake silver powder 10% %-20%, organic silver 1%-5%, and the organic matter is ethyl cellulose with different molecular weights. The silver paste can be used for silver spray and immersion silver process. By adding a large proportion of spherical silver powder, in the silver spray process, the atomization characteristics of the product during the silver spray process are improved, the film thickness uniformity and flatness are increased, and the silver paste is reduced. The degree of wear to the nozzle.

Description

technical field [0001] The invention relates to the technical field of silver paste, in particular to a silver paste formulation and a preparation process for improving the manufacturability of the silver paste and the density of the silver layer. Background technique [0002] The electrical performance of ceramic filters has always been an important performance index in the industry, which is not only related to the electrical performance parameters of the ceramic powder itself, but also to the electrical performance of the silver paste after metallization; , and also put forward higher requirements for the electrical properties of silver paste after sintering, and the density of silver layer is the decisive factor for electrical properties. However, the existing silver paste for filter cannot meet the higher density of the silver layer required by the existing ceramic filter, and the quality of the ceramic filter is poor. SUMMARY OF THE INVENTION [0003] The technical ...

Claims

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Application Information

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Patent Type & Authority Patents(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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