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High-power nickel-zinc soft magnetic ferrite material and preparation method thereof

A soft magnetic ferrite, high-power technology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of saturation magnetization, insufficient power loss, etc., to hinder domain wall movement, reduce consumption, and reduce power loss Effect

Inactive Publication Date: 2020-05-05
ZHONGDE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current nickel-zinc soft ferrite materials still have deficiencies in saturation magnetization, power loss and other properties, and it is of great significance to develop high-power nickel-zinc soft ferrite materials with high performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of a high-power nickel-zinc soft ferrite material, comprising the following steps:

[0025] S1, the Fe 2 o 3 , NiO, ZnO mixed uniformly to obtain the main material, in which Fe 2 o 3 50.5% NiO, 18% NiO, and ZnO as the balance; the main material is dried after ball milling once, and pre-calcined at 850°C, crushed to obtain calcined material, and the time for ball milling once is 6-10h;

[0026] S2, the CuO, V 2 0 5 、MoO 3 、CoC 2 o 4 、Gd 2 o 3 According to the molar ratio of 0.06: 0.15: 0.4: 0.02: 0.02, mix uniformly to obtain auxiliary materials, mix the auxiliary materials with the calcined materials evenly, and dry them after secondary ball milling to obtain mixed materials. The mass ratio of main materials to auxiliary materials 99.5:0.5, the time for the second ball milling is 12h;

[0027] S3. Uniformly mix the mixture with an aqueous solution of polyvinyl alcohol having a mass fraction of 8%, to obtain a mixed slurry. The mass ratio ...

Embodiment 2

[0031] A preparation method of a high-power nickel-zinc soft ferrite material, comprising the following steps:

[0032] S1, the Fe 2 o 3 , NiO, ZnO mixed uniformly to obtain the main material, in which Fe 2 o 3 48.5% NiO, 22% NiO, and ZnO as the balance; the main material is dried after a ball mill, and pre-calcined at 900°C, crushed to obtain a calcined material, and the time for a ball mill is 6-10h;

[0033] S2, the CuO, V 2 0 5 、MoO 3 、CoC 2 o 4 、Gd 2 o 3 According to the molar ratio of 0.08:0.2):0.6:0.03:0.03, mix uniformly to obtain auxiliary materials, mix the auxiliary materials with the calcined materials evenly, and dry after secondary ball milling to obtain the mixed materials. The quality of the main materials and auxiliary materials The ratio is 99.8:0.2, and the second ball milling time is 16h;

[0034] S3. Uniformly mix the mixture with a 10% polyvinyl alcohol aqueous solution to obtain a mixed slurry, and the mass ratio of the mixture to the polyviny...

Embodiment 3

[0038] A preparation method of a high-power nickel-zinc soft ferrite material, comprising the following steps:

[0039] S1, the Fe 2 o 3 , NiO, ZnO mixed uniformly to obtain the main material, in which Fe 2 o 3 50% NiO, 20% NiO, and ZnO as the balance; the main material was ball milled once, then dried, pre-calcined at 880°C, crushed to obtain pre-burnt material, and the time of ball milling was 8 hours;

[0040] S2, the CuO, V 2 0 5 、MoO 3 、CoC 2 o4 、Gd 2 o 3 According to the molar ratio of 0.075: 0.15: 0.5: 0.025: 0.025, mix uniformly to obtain auxiliary materials, mix the auxiliary materials with the pre-fired materials evenly, and dry them after secondary ball milling to obtain mixed materials. The mass ratio of main materials to auxiliary materials It is 99.6:0.4, and the time for the second ball milling is 15h;

[0041] S3. Uniformly mixing the mixture with a 10% polyvinyl alcohol aqueous solution by mass fraction to obtain a mixed slurry, the mass ratio of the...

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Abstract

The invention discloses a high-power nickel-zinc soft magnetic ferrite material and a preparation method thereof. The preparation method comprises the following steps: mixing S1, Fe2O3, NiO and ZnO tobe uniform to obtain a main material, carrying out primary ball milling and drying on the main material, and obtaining a pre-sintered material through pre-sintering treatment and crushing; S2, uniformly mixing CuO, V205, MoO3, CoC2O4 and Gd2O3 to obtain an auxiliary material, uniformly mixing the auxiliary material with the pre-sintered material, and carrying out secondary ball milling and dryingto obtain a mixture; S3, uniformly mixing the mixture with a polyvinyl alcohol aqueous solution to obtain mixed slurry; S4, performing stirring treatment on the mixed slurry under a microwave condition, and then performing spray granulation to obtain a granular material; and S5, carrying out compression molding on the granular material, then carrying out high-temperature sintering, and performingcooling to obtain the ferrite material. The nickel-zinc soft magnetic ferrite material prepared by the invention has high saturation flux density and low power loss, and is suitable for being appliedin a high-frequency high-power state.

Description

technical field [0001] The invention relates to the technical field of ferrite materials, in particular to a high-power nickel-zinc soft ferrite material and a preparation method thereof. Background technique [0002] Soft magnetic ferrite is a magnetic material widely used in aerospace, electronics, home appliances, automobiles, mining and military industries. It is mainly used in communication, sensing, audio-visual equipment, and electronic equipment such as filters and transformers. With the development of electronic information, electronic components tend to be high-density, lightweight, and thin, which puts forward higher requirements for the performance of soft ferrite materials. Due to the characteristics of porosity and high resistivity, nickel-zinc ferrite materials become the soft ferrite materials with the best performance in high-frequency and high-power applications. However, the current nickel-zinc soft ferrite materials still have insufficient performance in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/40C04B35/622H01F1/34
CPCC04B35/2608C04B35/265C04B35/622C04B2235/3224C04B2235/3239C04B2235/3256C04B2235/3275C04B2235/3279C04B2235/3281C04B2235/3284H01F1/344
Inventor 瞿德林沈建元王久如王晓祥李丛俊
Owner ZHONGDE ELECTRONICS
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