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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

AI Technical Summary

Problems solved by technology

However, only a few domestic companies can produce PC40 materials in small batches, and PC44 and PC47 brand products have not yet been mass-produced in China.

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
Effect test

Embodiment 1

[0028] (1) Mixing: main component ratio: 55-60% mol iron oxide (Fe 2 o 3 ), 3-8% mol zinc oxide (ZnO), 32-42% mol manganese oxide (MnO), accurately weigh the raw materials of the above main components, and then add a trace additive 1000ppm 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) Tablet pressing: Put the above-mentioned mixed main ingredient powder into a special powder tablet press machine, and press it into small flake-like particles with a certain strength.

[0030] (3) Pre-burning: put the above mixed powder into the rotary kiln for pre-burning, the pre-fired temperature is 700~800°C, the pre-fired time is 80~120 minutes, the flow rate of the mixed powder is controlled at about 5kg / min, and the rotary kiln speed is 5~20 revs / min, make the red mixed powder react i...

Embodiment 2~12

[0038] Using the steps and preparation method of Example 1, different proportions of main components and amounts of trace additives (as shown in Table 1) were selected to prepare samples respectively.

Embodiment 13

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

[0048] (1) Mixing: Prepare the main components, 55% mol iron oxide, 3% mol zinc oxide, 42% mol manganese oxide, accurately weigh the raw materials of the main components according to the proportion, use a strong mixer to mix, and control the mixing time to 2 hours, and then add Bi to it 2 o 3 、K 2 CO 3 , CaCO 3 , the total addition amount is 400ppm, the addition 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 evenly, so as to facilitate the complete preliminary solid phase reaction during pre-calcination;

[0049] (2) Tablet compression: put the mixed powder into a powder tablet press, and press it into a small flake-shaped granular powder with a certain strength;

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

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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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