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Preparation method of high-conductivity and high-adhesion conductive paste for ferrite core inductor

A technology of ferrite cores and conductive pastes, applied to conductive materials dispersed in non-conductive inorganic materials, inductance/transformer/magnet manufacturing, transformer/inductor cores, etc., can solve the problem of low density of silver layer , many defects, and low quality factors of chip inductors, to achieve high conductivity and good adhesion

Inactive Publication Date: 2019-08-23
SHANGHAI INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For these requirements, the existing silver paste for ferrite core inductors generally has certain defects, such as cracks after sintering, low density of the silver layer, many defects, etc., which make the quality factor of chip inductors low and circuit noise bigger

Method used

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  • Preparation method of high-conductivity and high-adhesion conductive paste for ferrite core inductor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for preparing a high-conductivity and high-adhesion conductive paste for ferrite core inductors, the specific steps are:

[0027] (1) 6g ethyl cellulose resin (molecular weight 90000, viscosity 20cps), 66g terpineol, 23g butyl carbitol acetate, 2g dibutyl phthalate, 2g polyvinyl alcohol, 1g 3,5 , 5-trimethylhexanol mixed to form an organic vehicle. The viscosity of the prepared conductive paste was measured by BROOKFIELD DV-II+Pro digital display viscometer, and the viscosity of the prepared conductive paste was measured at 10rpm at a temperature of 24.3°C to be 76kcp·s;

[0028] (2) add silver powder in the organic carrier of step (1) gained, three-roll machine is stirred to obtain conductive paste evenly; The add-on of silver powder is 8 times of the organic carrier quality of step (1) gained;

[0029] (3) The conductive paste obtained in step (2) is screen-printed, printed on the ferrite substrate, and screen-printed with 300 mesh gauzes;

[0030] (4) Sint...

Embodiment 2

[0033] A method for preparing a high-conductivity and high-adhesion conductive paste for ferrite core inductors, the specific steps are:

[0034] (1) Mix 32g of polyvinyl acetal resin (molecular weight: 340,000, viscosity: 15cps), 35g of terpineol, 30g of ethyl carbitol acetate, 1g of furoic acid, 1g of oleic acid, and 1g of peanut oil to form an organic vehicle. The viscosity of the prepared conductive paste was measured by BROOKFIELD DV-II+Pro digital display viscometer. The viscosity of the prepared conductive paste was measured at 10rpm at a temperature of 24.3°C to be 87kcp·s;

[0035] (2) add silver powder in the organic carrier of step (1) gained, three-roll machine stirs to obtain conductive paste evenly; The add-on of silver powder is 3.2 times of the organic carrier quality of step (1) gained;

[0036] (3) The conductive paste obtained in step (2) is screen-printed, printed on the ferrite substrate, and screen-printed with 400 mesh gauzes;

[0037] (4) Sinter the fe...

Embodiment 3

[0040] A method for preparing a high-conductivity and high-adhesion conductive paste for ferrite core inductors, the specific steps are:

[0041] (1) 6g polyvinyl alcohol resin (molecular weight 84000, viscosity 21cps), 44g terpineol, 44g butyl carbitol, 1g butane, 1g dibasic ester solvent RPDE, 1g BYK-322, 2g phthalate Dimethyl formate and 1 g of simethicone are mixed to form an organic vehicle. The viscosity of the prepared conductive paste was measured by BROOKFIELD DV-II+Pro digital display viscometer, and the viscosity of the prepared conductive paste was measured at 10rpm at a temperature of 24.3°C to be 89kcp·s;

[0042] (2) add silver powder in the organic carrier of step (1) gained, three-roll machine is stirred to obtain conductive paste evenly; The add-on of silver powder is 3 times of the organic carrier quality of step (1) gained;

[0043] (3) carry out screen printing with the conductive paste of step (2) gained, be printed on ferrite substrate, screen printing ...

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Abstract

The invention provides a preparation method of high-conductivity and high-adhesion conductive paste for a ferrite core inductor, and the method is characterized by comprising the following steps: 1, mixing a high-molecular polymer, an organic solvent and an organic additive to form an organic carrier; 2, adding silver powder into the organic carrier at the step 1, and performing uniform stirring to obtain the high-conductivity and high-adhesion conductive paste for the ferrite core inductor, wherein the addition amount of silver powder is 1-20 times of the mass of the organic carrier. The conductive paste prepared by the invention has high conductivity and good adhesion to a ferrite substrate.

Description

technical field [0001] The invention relates to the field of electronic components, in particular to a method for preparing a conductive paste with high conductivity and high adhesion for ferrite core inductors. Background technique [0002] Portable mobile devices have the advantages of small size, light weight, and portability, and there are more and more portable mobile devices now. As the three major passive components, the chip technology of resistors and capacitors has developed rapidly, and has already entered the stage of mass production and application. Its product types and specifications are very complete, while inductors are limited by the traditional winding process. It started late and developed relatively slowly. [0003] In the manufacturing process of inductors, conductive paste is the key. Conductive paste is the basis for the development of electronic components, and is the key material for packaging, electrodes and interconnection. Ferrite conductive s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01F41/02H01F27/24
CPCH01B1/22H01F27/24H01F41/02
Inventor 江国健宋晖魏泽彬刘高盛
Owner SHANGHAI INST OF TECH