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Manganese zinc ferrite core with high saturation magnetic flux density and preparation method thereof

A manganese-zinc ferrite, magnetic flux density technology, applied in magnetic core manufacturing, inductor/transformer/magnet manufacturing, inorganic material magnetism, etc. Zinc ferrite core saturation magnetic flux density decreases and other problems, to achieve the effect of increasing the saturation magnetic flux density, preventing the magnetic core density from decreasing, and increasing the resistivity

Active Publication Date: 2021-01-22
湖南艾迪奥电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the existing manganese-zinc ferrite cores generally use ferric oxide, manganese oxide and other oxides directly as initial raw materials. The content of impurities such as dialuminum, sodium oxide and phosphorus pentoxide is relatively high. Therefore, directly using oxides such as ferric oxide and manganese oxide as the raw material of the magnetic core will easily lead to the loss of the final manganese-zinc ferrite core. The saturation magnetic flux density decreases, so that the magnetic core products cannot meet the application requirements of high-power devices

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  • Manganese zinc ferrite core with high saturation magnetic flux density and preparation method thereof

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Embodiment 1

[0039] This embodiment provides a manganese zinc ferrite core with a high saturation magnetic flux density and a preparation method thereof. Specifically, the preparation method of the manganese zinc ferrite core includes the following steps:

[0040](1) According to the mass fraction, weigh the following components: manganese powder 20%, zinc oxide powder 11.9%, silicon dioxide 0.02%, calcium oxide 0.05%, vanadium pentoxide 0.03%, iron powder 68%, and set aside; Wherein, the iron powder is prepared by electrolyzing low-silicon and low-carbon steel under acidic conditions (pH value is 2); the mass content of silicon dioxide in the iron powder is less than 0.01%, and the particle size of the iron powder is less than 100 mesh; the mass content of manganese in the manganese powder is not less than 99.7%, the mass content of silicon in the manganese powder is less than 0.005%, and the particle size of the manganese powder is less than 100 mesh; the mass content of zinc oxide in the...

Embodiment 2

[0050] This embodiment provides a manganese zinc ferrite core with a high saturation magnetic flux density and a preparation method thereof. Specifically, the preparation method of the manganese zinc ferrite core includes the following steps:

[0051] (1) According to the mass fraction, weigh the following components: 15% manganese powder, 9.8% zinc oxide powder, 0.05% silicon dioxide, 0.1% calcium oxide, 0.05% vanadium pentoxide, 75% iron powder, set aside; Wherein, the iron powder is prepared by electrolyzing low-silicon and low-carbon steel under acidic conditions (pH value 3); the mass content of silicon dioxide in the iron powder is less than 0.01%, and the particle size of the iron powder is less than 100 mesh; the mass content of manganese in the manganese powder is not less than 99.7%, the mass content of silicon in the manganese powder is less than 0.005%, and the particle size of the manganese powder is less than 100 mesh; the mass content of zinc oxide in the zinc ox...

Embodiment 3

[0061] This embodiment provides a manganese zinc ferrite core with a high saturation magnetic flux density and a preparation method thereof. Specifically, the preparation method of the manganese zinc ferrite core includes the following steps:

[0062] (1) According to the molar mass fraction, weigh the following components: 18% manganese powder, 9.75% zinc oxide powder, 0.03% silicon dioxide, 0.08% calcium oxide, 0.04% vanadium pentoxide, 73% iron powder, and reserve ; Wherein, the iron powder is prepared by electrolysis of low-silicon and low-carbon steel under acidic conditions (pH value is 2); the mass content of silicon dioxide in the iron powder is lower than 0.01%, and the particle size of the iron powder is less than 100 mesh; the mass content of manganese in the manganese powder is not less than 99.7%, the mass content of silicon in the manganese powder is less than 0.005%, and the particle size of the manganese powder is less than 100 mesh; the mass content of zinc oxi...

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Abstract

The invention discloses a manganese-zinc ferrite magnetic core with high saturation magnetic flux density and a preparation method thereof, belonging to the technical field of magnetic materials. Thepreparation method of the manganese-zinc ferrite magnetic core adopts manganese powder, zinc oxide powder, silicon dioxide, calcium oxide, vanadium pentoxide and ferrous powder as raw materials. The preparation method comprises the steps of: performing synthetic reaction on manganese powder, zinc oxide powder and ferrous powder with hydrochloric acid and liquid ammonia in sequence; and performingpresintering, doping and ball milling, press forming, sintering treatment and air gap cutting treatment to obtain a manganese-zinc ferrite magnetic core. According to the invention, ferrous powder, manganese powder, zinc oxide powder and the like are used as initial raw materials, and the ferrous powder, the manganese powder and the zinc oxide powder are subjected to synthetic reaction and pre-sintering treatment with hydrochloric acid and liquid ammonia in sequence, so that ferric oxide, manganese oxide and zinc oxide with less impurity content can be obtained, and the subsequent sintering treatment can enable the physicochemical reaction of each component to be uniform, thereby achieving the purposes of reducing the porosity of the magnetic core, improving the density of the magnetic core and improving the saturation magnetic flux density.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a manganese zinc ferrite magnetic material with a high saturation magnetic flux density, a magnetic core and a preparation method thereof. Background technique [0002] Magnetic core is a magnetic material used in electronic devices such as power transformers, color TV transformers and switching power supplies. Among them, manganese zinc ferrite core is a kind of magnetic core product. Since the core needs to transmit power through magnetization under the condition of large current or high current with DC bias field, the higher the saturation flux density of the manganese zinc ferrite core, the greater the transmission efficiency. [0003] However, the existing manganese-zinc ferrite cores generally use ferric oxide, manganese oxide and other oxides directly as initial raw materials. The content of impurities such as dialuminum, sodium oxide and phosphorus pentoxide ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/01H01F41/02C04B35/26
CPCC04B35/2633C04B2235/3239C04B2235/3418C04B2235/96H01F1/01H01F41/0206H01F41/0246
Inventor 林开品邓辉玉吴燕瓶
Owner 湖南艾迪奥电子科技有限公司
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