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A kind of preparation method of multilayer co-fired inner electrode silver paste

A technology of inner electrode and silver paste, which is applied in the manufacture of cables/conductors, circuits, electrical components, etc. It can solve problems such as high sintering temperature, rising raw material costs, and expensive palladium, and achieve excellent electrical conductivity, low cost, and heat loss. Small amount of effect

Active Publication Date: 2018-01-09
CHINA ZHENHUA GRP YUNKE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sintering temperature of multi-layer co-fired products is often higher, generally higher than 800°C. Under normal circumstances, silver-palladium paste is required, but the price of palladium is expensive, resulting in a sharp increase in raw material costs.

Method used

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  • A kind of preparation method of multilayer co-fired inner electrode silver paste
  • A kind of preparation method of multilayer co-fired inner electrode silver paste
  • A kind of preparation method of multilayer co-fired inner electrode silver paste

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: take by weighing 1mol silver nitrate and be dissolved in 1L deionized water, stir and make it fully dissolve, under normal temperature situation stirring condition, 0.51mol sodium carbonate solution is added dropwise in the silver nitrate solution, produces yellow silver carbonate precipitation, Then add 1.5g of dispersant A and stir evenly, then continue to add 1.2mol formaldehyde reducing agent solution, and keep stirring, the stirring speed is 250rpm, and the dripping speed is 30ml / s. After the dropwise addition, continue to stir and react for 5min to obtain silver powder Suspension. The silver suspension was left to stand for a period of time, and then the silver powder was obtained through sedimentation and solid-liquid separation, and the precipitated silver powder was washed with deionized water for 7 times; then 2g of organic matter B was dissolved in 10g of absolute ethanol, and the organic matter Pour the ethanol solution into the washed silver p...

Embodiment 2

[0028] Embodiment 2: Weigh 1.2mol of silver nitrate and dissolve it in 1L of deionized water, stir to make it fully dissolved, and add 0.61mol of sodium carbonate solution dropwise to the silver nitrate solution under stirring conditions at normal temperature to produce yellow silver carbonate precipitation , then add 1g of dispersant A and stir evenly, take 2mol formaldehyde solution, first pour half of the formaldehyde reducing agent solution, and keep stirring, the stirring speed is 120rpm, after 5min of reaction, add the remaining half of the formaldehyde solution dropwise, the dropping speed is 30ml / s, after 5 minutes of reaction, a suspension of silver powder was obtained. The silver suspension was left to stand for a period of time, and then the silver powder was obtained through sedimentation and solid-liquid separation, and the precipitated silver powder was washed with deionized water for 7 times; then 2g of organic matter B was dissolved in 10g of absolute ethanol, a...

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Abstract

The invention discloses a preparation method of a multilayer co-fired internal electrode silver paste. The silver paste is composed of silver powder and an organic carrier, the content of the silver powder accounts for 80-90%, and the organic carrier accounts for 10-20%. In the method, the silver powder is selected from silver nitrate The raw material is formaldehyde, which is prepared by chemical co-deposition method; the organic carrier is composed of ethyl cellulose, terpineol, butyl carbitol, tributyl citrate and other additives. The shrinkage rate of the multi-layer co-fired internal electrode silver paste can be adjusted by the parameters and content of the silver powder. Some silver-palladium pastes have the advantages of low cost and high conductivity.

Description

technical field [0001] The invention relates to a preparation method of multi-layer co-fired inner electrode silver paste, in particular to a preparation method of inner electrode silver paste with high silver content, high temperature resistance sintering and matching with multi-layer co-fired ceramic materials. Background technique [0002] Electronic components are the foundation of the electronic information industry. Accelerating its development and improving the technical level are the key to the development of the electronic information industry. Internationally, the development of new varieties of electronic components and key technologies and processes have created conditions for the development and replacement of electronic complete machines. Therefore, it is bound to put forward new and higher requirements for electronic paste as an important part of electronic information materials. Doing a good job in the research and development of electronic information basic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00
Inventor 庞锦标杨秀杨邦朝韩玉成
Owner CHINA ZHENHUA GRP YUNKE ELECTRONICS