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Low-loss manganese zinc ferrite material for temperature of 40 DEG C below zero to 160 DEG C and manufacturing method thereof

A technology of manganese-zinc ferrite and ferrite material, applied in MnZn ferrite material and manufacturing, low-loss MnZn power ferrite material and its manufacturing field, can solve the problems of slow expansion of wide temperature characteristics, etc. Low cost and excellent performance

Active Publication Date: 2015-05-06
江门安磁电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing technologies show that the wide temperature characteristics expand slowly to the negative temperature direction, and the outdoor temperature in northern winter is usually below zero, so it is urgent to develop special wide temperature low loss MnZn ferrite materials covering negative temperatures

Method used

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  • Low-loss manganese zinc ferrite material for temperature of 40 DEG C below zero to 160 DEG C and manufacturing method thereof
  • Low-loss manganese zinc ferrite material for temperature of 40 DEG C below zero to 160 DEG C and manufacturing method thereof
  • Low-loss manganese zinc ferrite material for temperature of 40 DEG C below zero to 160 DEG C and manufacturing method thereof

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Experimental program
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Effect test

example 1-25

[0027] 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;

[0028] 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 0.90 μm;

[0029]3) Based on the total weight of the powder after ball milling, add 8.9wt% polyvinyl alcohol solution with a concentration of 8.9wt% 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...

example 26～30

[0045] 1) Fe 2 o 3 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;

[0046] 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 secondary grinding together, and grind until the average particle size of the powder is 1.0 μm;

[0047] 3) Based on the total weight of the powder after ball milling, add 9.5wt% polyvinyl alcohol solution with a concentration of 9.5wt% to the powder, mix and granulate evenly, and add a polyvinyl alcohol solution with a concentration of 0.4wt% to the pellet. Vinyl alcohol aqueous solution, make the moisture content of the powder reach 0.3wt%, based on the total weight of the obtained water-containing powde...

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Abstract

The invention provides a low-loss manganese zinc ferrite material for temperature of 40 DEG C below zero to 160 DEG C and a manufacturing method thereof. The ferrite material comprises main components and an auxiliary component, wherein the main components refer to x mol% of Fe2O3, y mol% of MnO and z mol% of ZnO; the auxiliary component comprises c wt% of Co2O3 based on the total weight of main components; the ratios of the components are that x is equal to 51.5-53.5, z is equal to 9.5-12.5, y is equal to 100-x-z and c is equal to 0.26-0.38; A being 2560-45x-9z is more than or equal to 60 and less than or equal to 110; and B being 150-3x-3y+371c is more than or equal to -20 and less than or equal to 20. The manganese zinc ferrite material is prepared by the process steps of batching, mixing, pre-sintering, performing secondary grinding, granulating, molding and sintering.

Description

technical field [0001] The invention relates to a MnZn ferrite material and a manufacturing method, in particular to a low-loss MnZn power ferrite material used at -40 to 160°C and a manufacturing method thereof, belonging to the manufacturing technology of metal functional materials for electronic components New materials and high-tech fields. Background technique [0002] Since the epoch-making launch of the wide-temperature low-loss manganese-zinc ferrite material PC95 by TDK Corporation of Japan in 2003, the research and development and production of wide-temperature low-loss manganese-zinc ferrite materials have flourished and become very active. The temperature range of wide temperature and low loss has gradually expanded from 25-120°C of PC95 to 25-140°C or even 0-140°C. Among them, the patent documents with wide temperature and low loss in the temperature range of 25-140°C are: CN102219487A and CN102693807A, and the patent documents with wide temperature and low los...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
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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