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High-performance calcium strontium zinc barium ferrite and preparation method thereof

A barium ferrite and ferrite technology, applied in the field of high-performance calcium strontium zinc barium ferrite and its preparation, can solve the problems such as the limited range of performance improvement of calcium ferrite, reduce repeated development and reduce pressure holding time, and the effect of reducing development costs

Inactive Publication Date: 2016-09-28
ANHUI SINOMAG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the M-type Sr ferrite is close to the limit, while the performance improvement of calcium ferrite is limited, and it is still impossible to achieve a remanence greater than 4500Gs and an intrinsic coercive force greater than 5600Oe

Method used

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  • High-performance calcium strontium zinc barium ferrite and preparation method thereof
  • High-performance calcium strontium zinc barium ferrite and preparation method thereof
  • High-performance calcium strontium zinc barium ferrite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0041] (1) First phase ferrite sintering:

[0042] According to the molecular formula Sr 1-x-y-z-k Ca x La y PR z Ba k Fe 2d-n co n Add strontium carbonate, lanthanum hydroxide, calcium carbonate, praseodymium oxide, barium carbonate, iron oxide, and cobalt carbonate to obtain ferrite powder through mixing, drying, sintering, and crushing, and take the powder by common ball milling process for the second time Material 1Kg, add small material CaCO 3 2.0%,Si 0.9%B 2 o 3 0.3%, ball milled for 30 hours, sintered at 1300°C, tested performance after grinding. There are 5 groups of the first phase ferrite in this test, as shown in Table 1 and Table 2 for the corresponding magnetic properties.

[0043] Table 1

[0044]

[0045] Table 2

[0046]

[0047] (2) Second phase ferrite sintering:

[0048] According to the molecular formula: Sr 1-x1-x2 La x1 Zn x2 Fe 2f-f1 co f1 Add strontium carbonate, lanthanum oxide, zinc oxide, iron oxide, and cobalt tetroxide to ...

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Abstract

The invention discloses high-performance calcium strontium zinc barium ferrite and a preparation method thereof. The high-performance calcium strontium zinc barium ferrite contains two compound phases of ferrite magnetic powder. The general formula of a first phase ferrite is Srl-x-y-z-kCaxLayPrzBakFe2d-nCon, wherein x is less than or equal to 0.4 and greater than or equal to 0.3; y is less than or equal to 0.4 and greater than or equal to 0.3; z is less than or equal to 0.15 and greater than or equal to 0.1; k is less than or equal to 0.15 and greater than or equal to 0.05; n is less than or equal to 0.45 and greater than or equal to 0.35; and 2d-n is less than or equal to 11.2 and greater than or equal to 10. The general formula of a second phase ferrite is Srl-xl-x2Lax1Znx2Fe2f-f1Cof1, wherein x1 is less than or equal to 0.3 and greater than or equal to 0.2; x2 is less than or equal to 0.2 and greater than or equal to 0.1; f1 is less than or equal to 0.26 and greater than or equal to 0.1; and 2f-f1 is less than or equal to 10.4 and greater than or equal to 9.8. The ferrite is prepared by steps of mixing materials, removing water content, pretreating powder, sintering, crushing, mixing and the like.

Description

technical field [0001] The invention relates to a high-performance sintered ferrite, in particular to a high-performance calcium-strontium-zinc-barium ferrite and a preparation method thereof. technical background [0002] Sintered permanent magnet ferrite is widely used in various fields, especially electric motors, generator magnetic tiles, the existing barium ferrite (BaFe12O19), strontium ferrite (SrFe12O19), and ion-based ferrite developed at home and abroad in recent years. Calcium ferrite, which replaces technology research and development, is not enough to meet the requirements of electronic products for the magnetic properties of permanent magnet ferrite. The miniaturization of electronic products requires magnetic tiles with extremely high magnetic energy levels, high remanence, coercive force, high Orthopedic magnetic tiles can ensure the normal operation of the motor in the case of large temperature fluctuations. [0003] In order to greatly improve the magnetic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/40C04B35/622C04B35/626H01F1/11
CPCC04B35/2641C04B35/622C04B35/626C04B35/62635C04B2235/3275C04B2235/3284H01F1/11
Inventor 刘野
Owner ANHUI SINOMAG TECH
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