Silver powder for conductive silver paste of ceramic filter and preparation method of silver powder

A ceramic filter, conductive silver paste technology, applied in conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, circuits, etc., can solve the problem of uneven silver layer, low effective conductivity, affecting product Q value , silver layer tensile surface roughness and other issues, to achieve the effect of good electrical conductivity and solderability, low cost, high uniformity of morphology and particle size

Inactive Publication Date: 2020-10-27
河南金渠银通金属材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Differences in the selection of silver powder can easily lead to rough silver layer sintered on the ceramic surface and low effective conductivity, which will affect the Q value, silver layer tension, surface roughness and other parameters of the product.

Method used

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  • Silver powder for conductive silver paste of ceramic filter and preparation method of silver powder
  • Silver powder for conductive silver paste of ceramic filter and preparation method of silver powder
  • Silver powder for conductive silver paste of ceramic filter and preparation method of silver powder

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preparation example Construction

[0016] The method for preparing the silver powder that is used for ceramic filter conductive silver paste provided by the invention, it comprises:

[0017] Step 1, prepare solution A: add PVP and potassium sulfate to the reaction kettle, then add deionized water, stir and dissolve evenly and set aside; step 2, prepare solution B: add deionized water to the reaction kettle, then add VC and Hydrogen peroxide, stir and dissolve evenly for later use; step 3, prepare solution C: add deionized water to the reaction kettle, then add silver nitrate, stir and dissolve evenly and then set aside; step 4, reduction reaction: first quickly add solution B to solution A , then add solution C to solution A, stir after completion, and prepare silver powder; step 5, post-processing: adjust the pH value of the solution, then wash and filter with a filter plate, remove excess water, and repeat the washing process several times, Silver powder is deposited, washed and dried to obtain silver powder....

Embodiment 1

[0027] A method for preparing silver powder for ceramic filter conductive silver paste, comprising:

[0028] Step 1, prepare A solution: add 20g of PVP and 1.5g of potassium sulfate to the reaction kettle, then add 500g of deionized water, stir and dissolve evenly and set aside; keep the temperature range at 30-35°C during this process. PVP uses K25's PVP.

[0029] Step 2, prepare solution B: add 220g of deionized water to the reaction kettle, then add 52g of VC and 2.5g of hydrogen peroxide in sequence, stir to dissolve evenly and set aside; keep the temperature range at 30-35°C during the process.

[0030] Step 3, prepare solution C: add 600g of deionized water to the reaction kettle, then add 100g of silver nitrate, stir to dissolve evenly and set aside; keep the temperature range at 30-35°C during this process.

[0031] Step 4, reduction reaction: first quickly add solution B to solution A, then add solution C to solution A at a flow rate of 60ml / min, and stir for 10 minu...

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Abstract

The invention discloses silver powder for conductive silver paste of a ceramic filter and a preparation method of the silver powder. The method comprises the steps of 1, preparing a solution A; 2, preparing a solution B; 3, preparing a solution C; 4, rapidly adding the solution B into the solution A, then adding the solution C into the solution A, conducting stirring after the solution C is addedinto the solution A to prepare silver powder; and 5, adjusting the pH value of the solution, cleaning and filtering by using a filter plate, removing excessive moisture, repeating the washing processfor several times, depositing the silver powder, and washing and drying to obtain silver powder. The invention also provides the silver powder prepared by the method. The prepared silver powder can form a silver conductive layer with good consistency, high compactness, high adhesive force and good conductivity and weldability, and the production efficiency of the ceramic filter can be improved.

Description

technical field [0001] The present invention relates to a silver powder used in the technical field of 5G communication and a preparation method thereof, in particular to a silver powder used in a ceramic filter conductive silver paste and a preparation method thereof. Background technique [0002] Conductive silver paste is one of the key materials of the filter. The conductivity of the conductive silver paste and the compactness of the conductive layer formed by the conductive silver paste have an important impact on the performance of the filter, and silver powder is an important component of the conductive silver paste. Therefore, silver paste and ceramic filter metallization process are also the focus of attention of ceramic filter manufacturers. Differences in the selection of silver powder can easily lead to rough silver layer sintered on the ceramic surface and low effective conductivity, which will affect parameters such as the Q value of the product, the pulling fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B13/00B22F9/24
CPCB22F9/24H01B1/22H01B13/00
Inventor 周斌沈仙林
Owner 河南金渠银通金属材料有限公司
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