A kind of method for preparing mnzn ferrite u-shaped magnetic core

A ferrite, U-shaped technology, applied in the direction of magnetic objects, magnetic materials, inorganic materials, etc., can solve the problems of high cost and complex process, and achieve the effect of improving performance, improving the uniformity of heating, and reducing heat loss.

Active Publication Date: 2022-04-29
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the above-mentioned problems in the prior art, the present invention provides a method for preparing MnZn ferrite U-shaped magnetic cores, which solves the problems of complex process and high cost in the prior art for preparing MnZn ferrite magnetic cores

Method used

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  • A kind of method for preparing mnzn ferrite u-shaped magnetic core
  • A kind of method for preparing mnzn ferrite u-shaped magnetic core
  • A kind of method for preparing mnzn ferrite u-shaped magnetic core

Examples

Experimental program
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Effect test

Embodiment 1

[0051] S1, under an air atmosphere (usually an atmospheric environment), 7 parts by weight of Fe2O3, 2 parts of Mn3O4 and 1 part of ZnO and containing trace impurity element oxides are made into spherical particles with a diameter of 50 μm to 300 μm by ball milling and Mix evenly to obtain spherical particle raw materials. In this process, it is necessary to mix the three kinds of spherical particles uniformly to the greatest extent, increase the contact area between each other, and promote the full progress of the subsequent reaction; at the same time, it is necessary to allow the air to contact the surface of the spherical particles evenly to avoid air in the spherical particles. The local concentration on the particles destroys the equilibrium atmosphere in the subsequent reaction process.

[0052] S2, according to the volume and theoretical density of a single U-shaped magnetic core to be prepared (usually 5.08g / cm 3 ) to calculate the quality of the required spherical pa...

Embodiment 2

[0077] S1, under an air atmosphere (usually an atmospheric environment), 8 parts by weight of Fe2O3, 1.5 parts of Mn3O4 and 0.8 parts of ZnO and containing trace impurity element oxides are made into spherical particles with a diameter of 50 μm to 300 μm by ball milling and Mix evenly to obtain spherical particle raw materials, such as Figure 4 Shown is the SEM morphology characterization photo of the spherical particle raw material.

[0078]S2, according to the volume and theoretical density of a single U-shaped magnetic core to be prepared (usually 5.08g / cm 3 ) to calculate the quality of the required spherical particle raw material, and accurately weigh the spherical particle raw material of this quality and fill it in the cavity 3 of the graphite mould.

[0079] S3, the cavity is sealed after the spherical particle raw material is filled, and the proportion of oxygen partial pressure in cavity 3 is adjusted to 3%.

[0080] Place the graphite mold in the sintering cavity...

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Abstract

The invention provides a method for preparing a MnZn ferrite U-shaped magnetic core, which relates to the technical field of ferrite magnetic core preparation. By selecting specific raw material types Fe2O3, Mn3O4 and ZnO and strictly controlling the proportion of each component of the raw material, the The raw materials are ball-milled into a certain range of particle sizes in an air-balanced atmosphere and then mixed uniformly. The sintering process is controlled by multi-step heating under a certain oxygen partial pressure, and the parameters of the heating rate and sintering temperature are controlled, as well as the cooling process. After energizing and cooling down, air cooling is used to control the damage of crystal grains to the surrounding structure, so as to achieve the purpose of preparing MnZn ferrite U-shaped magnetic cores with simple process and low cost with high quality and quantity.

Description

technical field [0001] The invention relates to the technical field of ferrite core preparation, in particular to a method for preparing a MnZn ferrite U-shaped core. Background technique [0002] With the development of high technology, the application of magnetic materials is becoming more and more extensive, and they are widely used in electrical telecommunications, automation, electrical appliances, military industry and other fields. Magnetic components made of magnetic materials have outstanding performance in storing information, energy, and converting and transmitting data. [0003] Ferrite is a kind of soft magnetic material with the most varieties, the most widely used and the largest consumption. Soft magnetic material refers to a magnetic material that is easy to magnetize and demagnetize under a weak magnetic field. MnZn ferrite refers to the natural spinel MgAl 2 o 4 A ferromagnetic compound composed of various metal oxides (usually including iron oxide) wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F1/34
CPCH01F41/0246H01F1/344
Inventor 黄坤兰李湉王维阎相忠杨屹
Owner SICHUAN UNIV
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