Water plating metallization method of manganese zinc ferrite magnetic core

A manganese-zinc ferrite and metallization technology, which is used in magnetic core manufacturing, inductor/transformer/magnet manufacturing, electrical components, etc.

Active Publication Date: 2021-09-10
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 cann

Method used

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  • Water plating metallization method of manganese zinc ferrite magnetic core
  • Water plating metallization method of manganese zinc ferrite magnetic core
  • Water plating metallization method of manganese zinc ferrite magnetic core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] A water-plated 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 powder, 25 parts by mass of water-based acrylic emulsion with a solid content of 40%, 1 part by mass of fatty alcohol polyoxyethylene ether, 0.5 parts by mass of parabens, and 0.5 parts by mass of polyether-modified silicone , 63 parts by mass of water and zirconium balls were added to a corundum ball mill jar, ball milled for 2 hours, and passed through a 350-mesh sieve to obtain glass slurry;

[0065] 2) Spray the glass slurry evenly on the surface of the MnZn 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 3 μm);

[0066] 3) Spray the copper paste evenly on the electrode part of the glass-coated magnetic core with a spray gun, dry at 140°C for 20 minutes, and then sinter...

Embodiment 2

[0069] A water-plated 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 powder, 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 Siloxane, 52.8 parts by mass of water and zirconium balls were added to a corundum ball mill jar, ball milled for 2 hours, and passed through a 350-mesh sieve to obtain glass slurry;

[0071] 2) Spray the glass slurry evenly on the surface of the MnZn 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 9 μm);

[0072] 3) Spray the copper paste evenly on the electrode part of the glass-coated magnetic core with a spray gun, dry at 140°C for 20 minutes, and then sinter at 700°C for 15...

Embodiment 3

[0075] A water-plated 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 powder, 30 parts by mass of polyvinyl alcohol solution with a mass fraction of 10%, 2.5 parts by mass of fatty alcohol polyoxyethylene ether, 0.5 parts by mass of benzimidazole, 0.5 parts by mass of polydimethylsiloxane, Add 36.5 parts by mass of water and zirconium balls into a corundum ball mill jar, mill for 2 hours, and pass through a 350-mesh sieve to obtain glass slurry;

[0077] 2) Spray the glass slurry evenly on the surface of the MnZn 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 part of the glass-coated magnetic core with a spray gun, dry at 140°C for 20 minutes, and then sinter at 700°C for 15 ...

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Abstract

The invention discloses a water plating metallization method of a manganese zinc ferrite magnetic core. The water plating metallization method comprises the following steps: 1) adding water into ZnO-B2O3-BaO system glass powder, and grinding to prepare glass slurry; 2) coating the surface of the manganese zinc ferrite magnetic core with the glass paste, drying, and sintering in a protective atmosphere to obtain a magnetic core containing a glass coating; 3) coating an electrode part of the magnetic core containing the glass coating with the copper paste, drying, and sintering in a protective atmosphere to obtain a copper-coated magnetic core; and 4) placing the copper-coated magnetic core in a nickel plating solution and a tin plating solution, and carrying out nickel plating and tin plating. According to the method, ZnO-B2O3-BaO system glass powder is firstly adopted to form the glass coating on the surface of the manganese zinc ferrite magnetic core, then water plating metallization is carried out, the problems of overplating and poor spot welding of the magnetic core, poor adhesion strength of a terminal electrode and the like are avoided, and the performance of the common mode inductor can be remarkably improved by applying the metallized magnetic core to the common mode inductor.

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 relatively common ferrite materials with their own advantages. Manganese zinc ferrite has the advantages of high magnetic permeability, high magnetic induction intensity, low surface resistance (kΩ level), etc., and is suitable for occasions where the frequency is lower than 5MHz. Nickel-zinc ferrite has relatively low magnetic permeability and high surface resistance (1GΩ~1000GΩ), which is suitable for applications with frequencies ranging from 1MHz to hundreds of megahertz. [0003] Common mode Choke, also called commo...

Claims

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Application Information

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IPC IPC(8): C04B41/89C03C12/00H01F41/02
CPCC04B41/52C04B41/89C03C12/00C04B41/009H01F41/0206C04B41/5022C04B41/5127C04B41/5144C04B35/26
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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