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High-resistivity soft-magnetic ferrite magnetic core and processing method thereof

A technology of soft ferrite and high resistivity, which is applied in the manufacture of inductors/transformers/magnets, circuits, electrical components, etc., to achieve the effect of small eddy current loss and high resistivity

Inactive Publication Date: 2019-04-30
TIANCHANG CITY ZHAOTIAN MAGNETOELECTRICITY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the rapid development of science and technology, the requirements for soft magnetic materials are also higher, and the existing soft magnetic cores can no longer meet the extensive requirements of the market.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A high-resistivity soft ferrite core, the raw materials of which in parts by weight include: 55 parts of ferric oxide, 8 parts of zinc oxide, 29 parts of manganese oxide, 4 parts of copper hydroxide, 2.9 parts of nickel oxide, 1.0 parts of sodium polyacrylate, 0.6 parts of silica sol, 0.9 parts of polyvinyl alcohol, 1.5 parts of polyamide resin, 1.1 parts of sodium silicate, 6 parts of deionized water.

[0023] The processing method of the above-mentioned high-resistivity soft ferrite core, the method comprising:

[0024] (1) Ferric oxide, zinc oxide, manganese oxide, copper hydroxide, and nickel oxide are mixed in parts by weight and ground to a particle size of less than 300 mesh;

[0025] (2) Fully stir and mix sodium polyacrylate, silica sol, polyvinyl alcohol, polyamide resin, sodium silicate, and deionized water at 130-145°C in parts by weight;

[0026] (3) Spray granulating the product prepared in step (1) and step (2);

[0027] (4) Compress the product after s...

Embodiment 2

[0034] The difference between this embodiment and Embodiment 1 is that in this embodiment, the high-resistivity soft ferrite core, its raw materials include: 53 parts of ferric oxide, 11 parts of zinc oxide, and 27 parts of manganese oxide in parts by weight. , 5 parts of copper hydroxide, 2.5 parts of nickel trioxide, 1.3 parts of sodium polyacrylate, 0.4 parts of silica sol, 1.1 parts of polyvinyl alcohol, 1.2 parts of polyamide resin, 1.3 parts of sodium silicate, and 3 parts of deionized water.

Embodiment 3

[0036] The difference between this embodiment and Embodiment 1 is that the high-resistivity soft ferrite core in this embodiment includes raw materials in parts by weight: 56 parts of ferric oxide, 6 parts of zinc oxide, and 31 parts of manganese oxide , 3 parts of copper hydroxide, 3.6 parts of nickel trioxide, 0.9 parts of sodium polyacrylate, 0.7 parts of silica sol, 0.7 parts of polyvinyl alcohol, 1.6 parts of polyamide resin, 0.7 parts of sodium silicate, and 7 parts of deionized water.

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Abstract

The invention provides a high-resistivity soft-magnetic ferrite magnetic core and a processing method thereof. Raw materials of the high-resistivity soft-magnetic ferrite magnetic core comprise, by weight, 53-56 parts of ferric oxide, 6-11 parts of zinc oxide, 27-31 parts of manganese oxide, 3-5 parts of copper hydroxide, 2.5-3.6 parts of nickel sesquioxide, 0.9-1.3 parts of sodium polyacrylate, 0.4-0.7 part of silica sol, 0.7-1.1 parts of polyvinyl alcohol, 1.2-1.6 parts of polyamide resin, 0.7-1.3 parts of sodium silicate and 3-7 parts of deionized water. The soft-magnetic ferrite magnetic core has a high resistivity, has a low eddy current loss under an alternating magnetic field, and is an ideal material for manufacturing high-freency transformers, broadband transformers, adjustable inductors and other high-frequency circuits.

Description

Technical field: [0001] The invention relates to a high-resistivity soft magnetic ferrite core and a processing method thereof, belonging to the technical field of soft magnetic material production. Background technique: [0002] Soft magnetic materials emerged with the rise of electric power and telecommunication technology, and have a wide range of applications, not only in the fields of home appliances, information technology, automobiles and other supporting fields, but more importantly, as the main components for the production of electronic components. Raw materials have brought a steady stream of demand for it. The ferrite core is made of non-metallic magnetic material with dense and homogeneous ceramic structure, and has low coercive force, also known as soft ferrite. The ferrite core is composed of iron oxide and one or several other metal oxides or carbonate compounds. The raw materials are pressed, then sintered at a high temperature of 1300 degrees, and finally ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/38C04B35/622H01F1/36H01F41/00H01F41/02
CPCC04B35/2608C04B35/265C04B35/2691C04B35/622C04B2235/3262C04B2235/3279C04B2235/3281C04B2235/3284C04B2235/3418C04B2235/3427C04B2235/656C04B2235/658H01F1/36H01F41/00H01F41/0246
Inventor 徐杰周福林张文军曾性儒王玉志张宗仁徐尔明董文龙陶天亮
Owner TIANCHANG CITY ZHAOTIAN MAGNETOELECTRICITY TECH
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