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Preparation method for magnetic compound material and application thereof in magnetic core preparation

A technology of magnetic composite materials and magnetic cores, which is applied in the fields of magnetism of inorganic materials, manufacture of inductors/transformers/magnets, electrical components, etc., can solve the problems of insignificant increase in impedance value and limited use range, etc., and achieves simple preparation methods and good absorption The effect of characteristics and raw materials are cheap and easy to obtain

Inactive Publication Date: 2019-04-09
TIANCHANG CITY ZHAOTIAN MAGNETOELECTRICITY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ferrite material is both a magnetic medium with magnetic absorption and a dielectric with electric absorption. It is a type of wave-absorbing material with excellent performance; Chinese patent CN105272195A discloses a nickel-zinc ferrite wave-absorbing material core and its manufacture The method, the magnetic core includes main components and additives, the main components are ferric oxide, zinc oxide, and nickel oxide, and the additives are tantalum oxide and / or niobium oxide; through the disclosed nickel-zinc ferrite absorbing The impedance value of the nickel-zinc ferrite core manufactured by the material core and its manufacturing method is increased by more than 15% at 25MHz; the initial magnetic permeability reaches more than 3000, and it has a good filtering effect on noise electromagnetic waves below 1MHz; It not only improves the performance of the magnetic core of the absorbing material, but also broadens the frequency range of absorbing noise electromagnetic waves; but at 50MHz, the impedance value does not increase significantly; it limits its scope of use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing a magnetic composite material, comprising the steps of:

[0025] Step 1, prepare the following raw materials in parts by weight:

[0026] Ferric oxide, 35 parts;

[0027] Ferric oxide, 10 parts;

[0028] Zinc oxide, 15 parts;

[0029] Vanadium pentoxide, 5 parts;

[0030] Magnesium oxide, 2 parts;

[0031] Step 2, mix ferric oxide and ferric oxide evenly, heat to 500-600°C, spray sulfuric acid aqueous solution with pH 4.5-5 under stirring condition, after spraying, keep heating at 500-600°C for 2-3 hours; the total amount of sulfuric acid aqueous solution sprayed is: 1-2% of the sum of the mass of ferric oxide and ferric oxide;

[0032] Step 3, adding nano zinc oxide to the mixture prepared in step 2, mixing evenly, heating to 900-1000°C, and heating for 2-3 hours;

[0033] Step 4, add vanadium pentoxide to the mixture prepared in step 3, mix evenly, heat to 1300-1500°C, heat for 1-2 hours, add magnesium oxide, and grind, heating and grindin...

Embodiment 2

[0036] A method for preparing a magnetic composite material, comprising the steps of:

[0037] Step 1, prepare the following raw materials in parts by weight:

[0038] Ferric oxide, 45 parts;

[0039] Ferric oxide, 15 parts;

[0040] Zinc oxide, 20 parts;

[0041] Vanadium pentoxide, 10 parts;

[0042] Magnesium oxide, 4 parts;

[0043] Step 2, mix ferric oxide and ferric oxide evenly, heat to 500-600°C, spray sulfuric acid aqueous solution with pH 4.5-5 under stirring condition, after spraying, keep heating at 500-600°C for 2-3 hours; the total amount of sulfuric acid aqueous solution sprayed is: 1-2% of the sum of the mass of ferric oxide and ferric oxide;

[0044] Step 3, adding nano zinc oxide to the mixture prepared in step 2, mixing evenly, heating to 900-1000°C, and heating for 2-3 hours;

[0045] Step 4, add vanadium pentoxide to the mixture prepared in step 3, mix evenly, heat to 1300-1500°C, heat for 1-2 hours, add magnesium oxide, and grind, heating and grindi...

Embodiment 3

[0069] Get the magnetic core prepared by Example 1-2 and Comparative Example 1-5 to test, and measure its impedance value at a frequency of 50MHz, and the results are shown in the table below:

[0070] group

[0071]From the above results, it can be seen that the pH value of the sprayed aqueous solution, the amount of spraying, the temperature of high-temperature sintering, and the composition of raw materials all have an impact on the magnetic properties of the final product.

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PUM

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Abstract

The invention belongs to the technical field of compound materials, in particular to a preparation method for a magnetic compound material and application thereof in magnetic core preparation. The method comprises the following steps that: S1: preparing raw materials, including ferric oxide, ferroferric oxide, zinc oxide, vanadium pentoxide and magnesium oxide; S2: evenly mixing the ferric oxide with the ferroferric oxide, heating mixture to 500-600DEG C, and under a stirring condition, sprinkling acidic aqueous solution; S3: adding nano-zinc oxide into the mixture prepared in S2, evenly mixing, and heating for 2-3h; and S4: adding the vanadium pentoxide into the mixture prepared in S3, adding the magnesium oxide after heating for 1-2h, and grinding to prepare the magnetic compound material. The impedance value of the magnetic core prepared from the magnetic compound material is above 180 at 50MHz, and the magnetic core displays good adsorption characteristics on noise electromagneticwaves.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a preparation method of magnetic composite materials and its application in preparing magnetic cores. Background technique [0002] Magnetic core refers to a sintered magnetic metal oxide composed of various iron oxide mixtures; for example, manganese-zinc ferrite and nickel-zinc ferrite are typical magnetic core body materials; manganese-zinc ferrite has The characteristics of high magnetic permeability and high magnetic flux density, and has the characteristics of low loss; nickel-zinc ferrite has the characteristics of extremely high resistivity and low magnetic permeability of less than a few hundred; ferrite core Used in coils and transformers of various electronic equipment. [0003] Ferrite material is both a magnetic medium with magnetic absorption and a dielectric with electric absorption. It is a type of wave-absorbing material with excellent pe...

Claims

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Application Information

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IPC IPC(8): H01F1/01H01F41/00H01F41/02C04B35/26
CPCC04B35/2625C04B2235/3239C04B2235/3284C04B2235/95C04B2235/96H01F1/01H01F41/00H01F41/0246
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