Ni-free 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 excellent performance and low preparation cost

Active Publication Date: 2017-03-29
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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  • Ni-free manganese-zinc ferrite material for -20-140°C and manufacturing method thereof
  • Ni-free manganese-zinc ferrite material for -20-140°C and manufacturing method thereof
  • Ni-free manganese-zinc ferrite material for -20-140°C and manufacturing method thereof

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Experimental program
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example 1-25

[0030] 1) Using commercially available Fe 2 o 3 (purity ≥ 99.3%), MnO (Mn content ≥ 76.6%), ZnO (purity ≥ 99.7%) as the main components, according to the amount shown in Table 1 Fe 2 o 3 , MnO, and ZnO are placed in a sand mill, stirred and ground to mix evenly, and pre-fired at 890°C for 2 hours after drying;

[0031] 2) Based on the total weight of the pre-burned powder, add additives: Co shown in Table 1 2 o 3 , 50ppm SiO 2 , 300ppm of CaCO 3 , 300ppm Nb 2 o 5 , 300ppm ZrO 2 and deionized water, dispersant, and defoamer for secondary grinding until the average particle size of the powder is 0.8 μm;

[0032] 3) Based on the total weight of the powder after ball milling, add 9.0wt% polyvinyl alcohol solution with a concentration of 9wt% to the powder, mix and granulate evenly, and add polyethylene with a concentration of 0.2wt% to the granules Alcohol aqueous solution, make the moisture content of the powder reach 0.25wt%, based on the total weight of the obtained w...

example 26～30

[0048] 1) Fe 2 o 3 54.0mol%, MnO 39.5mol%, ZnO 6.5mol% as the main component formula to weigh 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 components 2 o 3 Place in a sand mill, stir and grind to mix evenly, dry and pre-calcine at 920°C for 1.5h;

[0049] 2) Based on the total weight of the pre-calcined powder, add auxiliary components according to the addition amount shown in Table 3, then add deionized water, dispersant, and defoamer to carry out the second grinding together, and grind until the average particle size of the powder is 0.8 μm;

[0050] 3) Based on the total weight of the powder after ball milling, add 9.0wt% polyvinyl alcohol solution with a concentration of 9wt% to the powder, mix and granulate evenly, and add polyethylene with a concentration of 0.2wt% to the granules Alcohol aqueous solution, make the moisture content of the powder reach 0.25wt%, based on t...

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Abstract

The invention provides a Ni-free manganese-zinc ferrite material used at -20-140°C and a manufacturing method thereof. The ferrite material includes a main component and an auxiliary component, and the main component is Fe2O3: x mol%, MnO: y mol%, ZnO: z mol%, the auxiliary component is Co2O3: c wt% based on the total weight of the main component, wherein the ratio of each component is x=53.5-54.5, z=5.5-7.5, y=100‑x -z, c=0.25-0.45, and have the relationship of 70≤A=2580-45x-9z≤100, -30≤B=150-3x-3y+371c≤30. 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 Ni-free MnZn power ferrite material used at -20 to 140°C and a manufacturing method thereof, belonging to metal functional materials for electronic components New material high-tech field of manufacturing technology. Background technique [0002] Soft magnetic ferrite is a kind of magnetic material with the most varieties, the most widely used and the largest consumption, and it is an important basic functional material in the electronic information industry. In the production and use of soft magnetic ferrite, MnZn ferrite is dominant, and the output of MnZn ferrite accounts for about 70% of the total output of soft ferrite. It is currently the most concerned and active soft magnetic material. field. In recent years, the development of MnZn ferrite materials has shifted from the in-depth improvement of a single performance to the horizontal e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/34
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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