Composite soft magnetic material and preparation method thereof

A composite soft magnetic and nano-material technology, applied in the direction of inorganic material magnetism, can solve the problems of low insulation and voltage resistance, low resistivity, insufficient DC bias characteristics of devices, etc., and achieve the effect of improving insulation and voltage resistance

Active Publication Date: 2015-03-04
SHENZHEN SUNLORD ELECTRONICS
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Problems solved by technology

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 relatively low Bs of soft ferrite, the DC bias characteristics of the device are insufficient

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

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Embodiment Construction

[0021] The present invention will be further described in detail below in combination with specific embodiments. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0022] The embodiments of the present invention use composite soft magnetic material components with different proportions to prepare composite soft magnetic materials, and the composite soft magnetic materials prepared by the proportions of each embodiment and each comparative example are tested and evaluated respectively. Wherein Table 1 shows the composite soft magnetic material composition ratio of the embodiment and the comparative example, and the steps of the specific preparation method are as follows:

[0023] Step S1: Mixing; perform dry mixing according to the composition ratio in Table 1, and the mixing time is 60 to 90 minutes;

[0024] Step S2: pre-burning; the mixed materials are pre-fired in a nitrogen-p...

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Abstract

The invention discloses a composite soft magnetic material and a preparation method thereof. The composite soft magnetic material comprises the following components in percentage by mass: 82.56 to 98.45 percent of FeSiCr, 0.3 to 8.9 percent of Fe2O3, 0.1 to 1.93 percent of NiO, 0.1 to 2.13 percent of ZnO and 0.1 to 0.53 percent of CuO. The preparation method of the composite soft magnetic material comprises mixing, pre-burning, smashing, pressing and sintering. The saturation flux density of the composite soft magnetic material is adjusted by adjusting the content of FeSiCr, and the content of generated NiCuZn ferrite is adjusted by adjusting the content of Fe2O3, NiO, ZnO and CuO, so that the insulation and pressure-resistant property of the composite soft magnetic material are enhanced.

Description

technical field [0001] The invention relates to the technical 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 the existing soft ferrite is that it has high magnetic permeability and resistivity (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. However, 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...

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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