Method for preparing Mn-Zn soft magnetic power ferrite core material

A ferrite core, soft magnetic technology, applied in the direction of inorganic material magnetism, etc., to achieve the effect of reducing cross-sectional area, improving power efficiency, and reducing heat generation

Inactive Publication Date: 2012-09-19
上海康顺磁性元件厂有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, only a few domestic companies can produce PC40 materials in small batc

Method used

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  • Method for preparing Mn-Zn soft magnetic power ferrite core material
  • Method for preparing Mn-Zn soft magnetic power ferrite core material

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0027] Example 1

[0028] (1) Mixing: main component distribution ratio: 55-60% mol iron oxide (Fe 2 O 3 ), 3-8% mol of zinc oxide (ZnO), 32-42% mol of manganese oxide (MnO), accurately weigh the raw materials of the above main components, and then add a trace additive of 1000 ppm Bi based on the total weight of the main components 2 O 3 , 200ppm K 2 CO 3 , 2500ppm NiO is mixed evenly with a strong mixer, and the total mixing time is 2 hours. The particle size of the mixed powder is controlled at about 0.8~1.0μm.

[0029] (2) Tableting: Put the above-mentioned mixed main ingredient powder into a special powder tableting machine and press it into small flaky particles with a certain strength.

[0030] (3) Pre-burning: Put the above-mentioned mixed powder into the rotary kiln for pre-burning, the pre-burning temperature is 700-800℃, the pre-burning time is 80-120 minutes, the flow rate of the mixed powder is controlled to be about 5kg / min, and the rotary kiln speed is 5~20 revolutions...

Example Embodiment

[0037] Examples 2~12

[0038] Using the steps and preparation method of Example 1, samples were prepared with different ratios of main components and addition amounts of trace additives (specifically shown in Table 1).

Example Embodiment

[0046] Example 13

[0047] A method for making manganese-zinc soft magnetic power ferrite core material includes the following steps:

[0048] (1) Mixing: prepare the main components, 55% mol iron oxide, 3% mol zinc oxide, 42% mol manganese oxide, and accurately weigh the raw materials of the main components according to the ratio. Use a strong mixer to mix and control the mixing time to 2 Hours, then add Bi to it 2 O 3 , K 2 CO 3 , CaCO 3 , The total added amount is 400ppm, the added amount of each component is 100ppm, 100ppm, 200ppm, respectively, the particle size of the mixed powder is controlled at 0.8μm, so that the raw materials are mixed uniformly, in order to facilitate the preliminary solid phase reaction during pre-sintering;

[0049] (2) Tableting: Put the mixed powder into the powder tableting machine, and compress it into small flake-like granular powder with certain strength;

[0050] (3) Pre-burning: Put the above-mentioned small flake granular powder into the rotary ...

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Abstract

The invention relates to a method for preparing a Mn-Zn soft magnetic power ferrite core material. The method comprises the following specific implementation process flows of: weighing, mixing, tableting, presintering, crushing, sanding, pulping, spray granulation, pressing and sintering. Compared with the prior art, the method for preparing the Mn-Zn soft magnetic power ferrite core material has the advantages that the heat productivity is reduced, and miniaturization and thinning are realized. Moreover, the Mn-Zn soft magnetic power ferrite core material has high saturation flux density (Bs) and low power loss.

Description

technical field [0001] The invention belongs to the technical field of oxide magnetic materials, and in particular relates to a method for manufacturing a manganese-zinc soft-magnetic power ferrite core with high saturation magnetic induction (Bs) and low power loss. Background technique [0002] In recent years, digital home appliances have become increasingly popular, and the whole machine is rapidly developing in the direction of miniaturization and light weight, especially the trend of thinner frame of flat-panel TV is more obvious. In this case, the power supply circuit must be miniaturized and thinned. As one of its solutions, it is necessary to give full play to its own complete set of technologies from raw material development to application engineering, develop a new type of transformer, and realize the miniaturization and thinning of transformer products. Power ferrite is a kind of soft magnetic material used in power transformers earlier. In order to meet the req...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622H01F1/36
Inventor 陈俊黄国平
Owner 上海康顺磁性元件厂有限公司
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