Low-loss manganese-zinc ferrite material for -20-140°C and manufacturing method thereof

A technology of manganese-zinc ferrite and ferrite materials, applied in the direction of magnetic properties of inorganic materials, can solve the problems of wide temperature and low loss range to be further expanded, and achieve the effect of low cost, excellent performance and good creativity

Active Publication Date: 2017-04-19
江门安磁电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The inventor's published invention patents CN102682946A and CN103496963A take into account the technical solutions of high temperature, high Bs and wide temperature and low loss dual characteristics, but the range of wide temperature and low loss needs to be further expanded

Method used

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  • Low-loss manganese-zinc ferrite material for -20-140°C and manufacturing method thereof
  • Low-loss manganese-zinc ferrite material for -20-140°C and manufacturing method thereof
  • Low-loss manganese-zinc ferrite material for -20-140°C and manufacturing method thereof

Examples

Experimental program
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example 1-25

[0029] 1) Use commercially available Fe 2 O 3 (Purity ≥99.3%), MnO (Mn content ≥76.6%), ZnO (purity ≥99.7%) as the main components, and Fe 2 O 3 , MnO and ZnO are placed in a sand mill, stir and grind to mix evenly, and then pre-fire at 890℃ for 2h after drying;

[0030] 2) Based on the total weight of the pre-fired powder, add additives: Co as shown in Table 1 2 O 3 And NiO, 50ppm SiO 2 , 300ppm CaCO 3 , 300ppm of Nb 2 O 5 , 300ppm of ZrO 2 Perform secondary grinding together with deionized water, dispersant and defoamer, and grind until the average particle size of the powder is 0.8μm;

[0031] 3) Based on the total weight of the powder after ball milling, add 9.0wt% of a 9wt% polyvinyl alcohol solution to the powder, mix and granulate uniformly, and add 0.2wt% polyethylene to the pellets Alcohol aqueous solution to make the powder moisture content reach 0.25wt%, based on the total weight of the obtained aqueous powder, add 0.4wt% zinc stearate for mixing, and use a 40-ton dry pow...

example 26～30

[0046] 1) Take Fe 2 O 3 55.0mol%, MnO 36.5mol%, ZnO 8.5mol% as the main component formula weighing Fe 2 O 3 (Purity ≥99.3%), MnO (Mn content ≥76.6%), ZnO (purity ≥99.7%) raw materials and 0.34wt% Co based on the total weight of the main component 2 O 3 Put 0.7wt% NiO in a sand mill, stir and grind to mix evenly, and then pre-fire at 920℃ for 1.5h after drying;

[0047] 2) Based on the total weight of the pre-fired powder, add auxiliary components according to the addition amount shown in Table 3, then add deionized water, dispersant, and defoamer together for secondary grinding, and grind until the average particle size of the powder is 0.8 μm;

[0048] 3) Based on the total weight of the powder after ball milling, add 9.0wt% of a 9wt% polyvinyl alcohol solution to the powder, mix and granulate uniformly, and add 0.2wt% polyethylene to the pellets Alcohol aqueous solution to make the powder moisture content reach 0.25wt%, based on the total weight of the obtained aqueous powder, ad...

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Abstract

The invention provides a low-loss manganese-zinc ferrite material for -20-140°C and a manufacturing method thereof. The ferrite material includes main components and auxiliary components, and the main components are Fe2O3: x mol%, MnO: y mol%, ZnO: z mol%, the auxiliary components are Co2O3: c wt% and NiO: n wt% based on the total weight of the main components, and the ratio of each component is x=54.5-55.5, z=7.5-9.5, y =100-x-z, c=0.25-0.45, n=0.3-0.9, and have 30≤A=2600-45x-9z≤80,-30≤B=150-3x-3y+371c-1.6n≤30 Relationship. Manganese-zinc ferrite materials are made through batching, mixing, pre-calcination, secondary grinding, granulation, molding, sintering and other process steps.

Description

Technical field [0001] The invention relates to a MnZn soft magnetic ferrite material and a manufacturing method, in particular to a low-loss MnZn power ferrite material used at -20-140°C and a manufacturing method thereof, and belongs to the manufacturing of metal functional materials for electronic components Technology in the high-tech field of new materials. Background technique [0002] Soft ferrite is a kind of magnetic material with the most variety, the widest application, and the largest amount. It is an important basic functional material in the electronic information industry. The dominant position in the production and use of soft magnetic ferrite is MnZn ferrite. The output of MnZn ferrite accounts for about 70% of the total output of soft magnetic ferrite. It is currently the most concerned and most active soft magnetic material. field. In recent years, the development of MnZn ferrite materials has shifted from the improvement of the depth of a single performance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/34C04B35/26C04B35/622
Inventor 黄爱萍谭福清豆小明汪南东
Owner 江门安磁电子有限公司
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