Conductive silver paste for ferrite core inductance and method for producing same

A technology of ferrite magnetic core and conductive silver paste, which is applied in the direction of cable/conductor manufacturing, transformer/inductor coil/winding/connection, conductive materials dispersed in non-conductive inorganic materials, etc., which can solve the problem of non-dense silver layer , the silver layer is easy to fall off, cracks and other problems, to achieve the effect of not easy to crack, ensure stability and consistency, and improve corrosion resistance

Active Publication Date: 2012-07-25
广东羚光新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For these requirements, the silver paste for domestic ferrite core inductors generally has certain defects. After sintering, cracks occur, the silver layer is not dense, and it is difficult to plate; the silver layer is easy to fall off after being corroded in the plating solution.

Method used

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  • Conductive silver paste for ferrite core inductance and method for producing same
  • Conductive silver paste for ferrite core inductance and method for producing same
  • Conductive silver paste for ferrite core inductance and method for producing same

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Carry out the preparation of silver paste for ferrite core inductors according to the following steps:

[0032] (1), preparation of lead-free glass powder

[0033] Batching according to the following mass percentages:

[0034] Na 2 O 20Wt%, CaO 20Wt%, SiO 2 55wt%, Al 2 o 3 3.5Wt%, inorganic additive HfO 2 1.5 wt%.

[0035] Mix evenly with a pot mill, preheat at 450°C for 30 minutes, melt at 1200°C for 60 minutes, quench, ball mill until the particle size is less than 10 μm, filter and dry.

[0036] (two), the preparation of organic carrier

[0037] Batching according to the following mass percentages:

[0038] 25% ethyl cellulose, 20% terpineol, 45% diethylene glycol butyl ether, and 10% organic additive polyacrylate. After mixing the above materials, heat and dissolve them at 80-100°C to obtain a transparent glue.

[0039] (3), according to the following mass percentage ingredients:

[0040] Ultrafine silver powder 45%, flaky silver powder 25%, lead-free g...

Embodiment 2

[0043] Carry out the preparation of silver paste for ferrite core inductors according to the following steps:

[0044] (1), preparation of lead-free glass powder

[0045] Batching according to the following mass percentages:

[0046] Na 2 O 22Wt%, CaO 25Wt%, SiO 2 48wt%, Al 2 o 3 3wt%, inorganic additive CeO 2 2%.

[0047] Mix evenly with a pot mill, preheat at 450°C for 30 minutes, melt at 1200°C for 60 minutes, quench, ball mill until the particle size is less than 10 μm, filter and dry.

[0048] (two), the preparation of organic carrier

[0049] Batching according to the following mass percentages:

[0050] Ethyl cellulose 20%, terpineol 25%, diethylene glycol butyl ether 50%, organomodified polysiloxane 5%,

[0051] After the above materials are mixed, heat and dissolve at 80-100°C to obtain a transparent glue solution.

[0052] (3), according to the following mass percentage ingredients:

[0053] 55% superfine silver powder, 15% flake silver powder, 3% glass...

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Abstract

The invention discloses a conductive silver paste for a ferrite core inductance and a method for producing the same, wherein the method comprises the following steps that: (1) lead-free glass powder is produced and contains an inorganic additive I which occupies 1-4% of the total quantity of the lead-free glass powder; (2) an organic carrier is produced; (3) superfine silver powder, silver flake, the lead-free glass powder and an inorganic additive II are mixed to produce the powder, the powder is uniformly stirred and then added into the organic carrier, after high-speed stirring and dispersion, the powder is rolled by a three-roller mill to the fineness of lower than 10mum, and is screened by a screen of 200 meshes for producing the conductive silver paste for the ferrite core inductance. The ferrite conductive silver paste can effectively solve the defects of the silver paste for the ferrite core inductance on corrosion resistance, adhesive force and electroplating performance, has good quality, is low in cost, and is an ideal substitute product for lead-bearing paste. The adopted technology can ensure the stability and consistency of the silver paste.

Description

technical field [0001] The invention relates to the technical field of conductive paste for electronic products. Background technique [0002] With the increasing application of conductive paste in various high-performance electronic products, the requirements for paste performance are increasing, and the supply of more functional, professional and high-performance conductive paste is also required. Metallic silver conductor paste has become a key functional material for the production of various electronic components due to its high electrical conductivity, excellent adhesion, solderability and other mechanical properties, and has an irreplaceable role in the electronics industry. [0003] Ferrite conductive silver paste is used in ferrite core inductance components. As a basic functional material in electronic information and electronics industry, it is widely used in computer, communication, power supply, consumer electronics and other fields. [0004] Ferrite conductive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B1/22H01B1/16H01F27/29
Inventor 谭汝泉王惠敏宋先刚陈林泉娄红涛朱登雷邱韬彭梅志张文秦朝军
Owner 广东羚光新材料股份有限公司
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