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Compound soft magnetic material and preparation method thereof

A composite soft magnetic and mixed material technology, applied in the field of soft magnetic materials, can solve the problems of poor mechanical strength, low magnetic permeability, etc., and achieve the effects of high Bs, high magnetic permeability, and improved insulation and withstand voltage performance.

Active Publication Date: 2015-03-11
SHENZHEN SUNLORD ELECTRONICS
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Problems solved by technology

The composite sintered magnetic material not only improves the low magnetic permeability of the previous powder magnetic core, but also overcomes the defect of poor mechanical strength of the previous powder magnetic core due to the weak combination of the metal powder and the ferrite layer. Composite sintered magnetic material in transformer magnetic core, choke coil, or magnetic head, etc., and manufacturing method thereof, and composite sintered magnetic material suitable for magnetic element

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  • Compound soft magnetic material and preparation method thereof
  • Compound soft magnetic material and preparation method thereof
  • Compound soft magnetic material and preparation method thereof

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Embodiment Construction

[0036] The preferred embodiments of the invention will be further described in detail below.

[0037] In one embodiment, the preparation method of the composite soft magnetic material is as follows:

[0038] (1) mixing: carry out dry mixing after the main component proportioning proportioning described in table 1 (embodiment and comparative example), the mixing time is 60~90 minutes;

[0039] (2) Pre-burning: pre-fire the mixed materials in a nitrogen-protected pusher kiln, the pre-fire temperature is controlled at 670±20°C, the pre-fire time is 200-300 minutes, and the oxygen content is controlled below 1%;

[0040] (3) Pulverization: Wet pulverization is carried out in the calcined material obtained by calcining in the previous step, using absolute ethanol as a solvent, the pulverization time is 60 to 120 minutes, and the particle size of the slurry after pulverization is controlled at 3 to 30 μm;

[0041] (4) granulation: add furfural resin equivalent to 3.5% of slurry wei...

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Abstract

The invention discloses a compound soft magnetic material and a preparation method thereof. The compound soft magnetic material comprises following components by weight percent: 48.25-76.91% of FeSiCr, 15-30.5% of Fe2O3, 3-9% of NiO, 3.8-7.3% of ZnO, 1.0-2.5% of CuO, 0.01-0.65% of Bi2O3, 0.03-0.55% of V2O5, 0.15-0.75% of SiO2, and 0.1-0.5% of Mn3O4. The compound soft magnetic material has high initial permeability and high saturation magnetic flux density.

Description

【Technical field】 [0001] The invention relates to the field of soft magnetic materials, in particular to a composite soft magnetic material and a preparation method thereof. 【Background technique】 [0002] The biggest advantage of soft ferrite is that it has high permeability and resistivity at high frequencies (10 2 ~10 6 Ω·cm), the biggest advantage of the soft magnetic alloy is that it has a high saturation magnetic flux density (Bs), and has the characteristics of good DC superposition characteristics. [0003] With the development of devices towards miniaturization and high current, higher requirements are put forward for the performance of soft magnetic materials. Power inductors are used at high frequencies, especially at 100KHz and above. On the one hand, soft magnetic alloys often have low electrical resistivity, low insulation and withstand voltage performance, and large core heating, resulting in deterioration of device performance. On the one hand, due to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/33C04B35/622
Inventor 聂敏周勋李有云
Owner SHENZHEN SUNLORD ELECTRONICS
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