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A kind of water plating metallization method of manganese zinc ferrite magnetic core

A manganese-zinc ferrite and metallization technology, which is applied in the manufacture of magnetic cores, inductors/transformers/magnets, electrical components, etc., can solve problems such as inability to solve climbing plating, inability to use metallization process, and low surface resistance. To achieve the effect of overcoming the impossibility of water-plating metallization, acid corrosion resistance, and improving performance

Active Publication Date: 2022-02-22
广东泛瑞新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low surface resistance of manganese-zinc ferrite, it is impossible to solve the problem of creeping plating during water plating, and the insulating coatings coated on the surface of manganese-zinc products on the market cannot withstand the sintering of silver paste / silver palladium paste at all. High temperature (600℃~900℃), so manganese zinc ferrite cannot adopt the traditional metallization process of dipping silver paste and then plating nickel and tin in water

Method used

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  • A kind of water plating metallization method of manganese zinc ferrite magnetic core
  • A kind of water plating metallization method of manganese zinc ferrite magnetic core
  • A kind of water plating metallization method of manganese zinc ferrite magnetic core

Examples

Experimental program
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Effect test

Embodiment 1

[0063] A water plating metallization method for a manganese-zinc ferrite core, comprising the following steps:

[0064] 1) 10 parts by mass of ZnO-B 2 O 3 -BaO system glass frit, 25 parts by mass of aqueous acrylic emulsion with a solid content of 40%, 1 part by mass of fatty alcohol polyoxyethylene ether, 0.5 part by mass of paraben, 0.5 part by mass of polyether-modified silicone , 63 parts by mass of water and zirconium balls were added to the corundum ball mill tank, ball milled for 2h, and passed through a 350-mesh sieve to obtain glass slurry;

[0065] 2) Spray the glass slurry on the surface of the manganese-zinc ferrite core evenly with a spray gun, dry at 140° C. for 20 minutes, and then sinter at 850° C. for 20 minutes in a nitrogen atmosphere to obtain a magnetic core with a glass coating (thickness 3 μm);

[0066] 3) Spray the copper paste evenly on the electrode parts of the magnetic core containing the glass coating with a spray gun, dry at 140°C for 20 minutes...

Embodiment 2

[0069] A water plating metallization method for a manganese-zinc ferrite core, comprising the following steps:

[0070] 1) 20 parts by mass of ZnO-B 2 O 3 -BaO system glass frit, 25 parts by mass of 8% hydroxypropyl methylcellulose solution, 1.2 parts by mass of fatty alcohol polyoxyethylene ether, 0.5 parts by mass of benzimidazole, 0.5 parts by mass of polydimethyl cellulose Siloxane, 52.8 parts by mass of water and zirconium balls were added to a corundum ball mill, ball milled for 2 hours, and passed through a 350-mesh sieve to obtain glass slurry;

[0071] 2) Spray the glass slurry on the surface of the manganese-zinc ferrite core evenly with a spray gun, dry at 140° C. for 20 minutes, and then sinter at 850° C. for 20 minutes in a nitrogen atmosphere to obtain a magnetic core with a glass coating (thickness 9 μm);

[0072] 3) Spray the copper paste evenly on the electrode parts of the magnetic core containing the glass coating with a spray gun, dry at 140°C for 20 minu...

Embodiment 3

[0075] A water plating metallization method for a manganese-zinc ferrite core, comprising the following steps:

[0076] 1) 30 parts by mass of ZnO-B 2 O 3 -BaO system glass frit, 30 parts by mass of 10% polyvinyl alcohol solution, 2.5 parts by mass of fatty alcohol polyoxyethylene ether, 0.5 part by mass of benzimidazole, 0.5 part by mass of polydimethylsiloxane, 36.5 parts by mass of water and zirconium balls were added to a corundum ball mill, ball milled for 2 hours, and passed through a 350-mesh sieve to obtain glass slurry;

[0077] 2) Spray the glass slurry on the surface of the manganese-zinc ferrite core with a spray gun, dry at 140°C for 20 minutes, and then sinter at 850°C for 20 minutes in a nitrogen atmosphere to obtain a magnetic core with a glass coating (thickness 15 μm);

[0078] 3) Spray the copper paste evenly on the electrode parts of the magnetic core containing the glass coating with a spray gun, dry at 140°C for 20 minutes, and then sinter at 700°C for ...

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Abstract

The invention discloses a water-plating metallization method for a manganese-zinc ferrite core, which comprises the following steps: 1) adding ZnO-B 2 o 3 ‑BaO system glass powder is added with water to make glass paste; 2) glass paste is coated on the surface of manganese zinc ferrite core, dried, and then sintered in a protective atmosphere to obtain a magnetic core with glass coating; 3) Copper paste is coated on the electrode part of the magnetic core containing glass coating, dried, and then sintered in a protective atmosphere to obtain a copper-coated magnetic core; 4) Place the copper-coated magnetic core in a nickel plating solution and a tin plating solution , nickel-plated and tin-plated. The present invention first adopts ZnO-B 2 o 3 ‑BaO system glass powder forms a glass coating on the surface of the manganese-zinc ferrite core, and then conducts water-plating metallization, which avoids the problems of core plating, poor spot welding, and poor adhesion strength of terminal electrodes, and completes the metallization process. The use of magnetic cores in common mode inductors can significantly improve the performance of common mode inductors.

Description

technical field [0001] The invention relates to the technical field of magnetic core processing, in particular to a water plating metallization method for a manganese-zinc ferrite magnetic core. Background technique [0002] Ferrite materials are mainly used in the fields of computers, communications, power supplies and consumer electronics, and are one of the basic materials for electronic components. Manganese-zinc ferrite and nickel-zinc ferrite are two more common ferrite materials with their own advantages. Manganese-zinc ferrite has the advantages of high magnetic permeability, high magnetic induction intensity, and low surface resistance (kΩ level), and is suitable for applications with frequencies below 5MHz. Nickel-zinc ferrite has relatively low magnetic permeability and high surface resistance (1GΩ~1000GΩ), and is suitable for applications in the frequency range from 1MHz to hundreds of megahertz. [0003] Common mode choke, also known as common mode choke coil,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/89C03C12/00H01F41/02
CPCC04B41/52C04B41/89C03C12/00C04B41/009H01F41/0206
Inventor 杨明雄向晋钰蒋仲翔
Owner 广东泛瑞新材料有限公司
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