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Z-type hexagonal ferrite material and preparation method thereof

A technology of hexagonal ferrite and powder is applied in the field of Z-type hexagonal ferrite material and its preparation to achieve the effects of increasing the total magnetic moment, enhancing the interaction, and improving the anisotropy constant.

Inactive Publication Date: 2013-09-25
广东领益智造股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the common spinel ferrite material widely used, due to the limitation of Snoek formula, the material can only work in the frequency range of about 100MHz, and has serious eddy current loss and skin effect at high frequency
Therefore, for ultra high frequency (UHF, ultra high frequency) electromagnetic interference, spinel ferrite can no longer meet the requirements

Method used

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preparation example Construction

[0023] This embodiment also provides a preparation method for preparing the above-mentioned Z-type hexagonal ferrite, comprising the following steps:

[0024] 1) Step 1, Fe2O3, BaCO3, SrCO3, CoO, Gd2O3 or Fe2O3, BaCO3, SrCO3, CoO, Sm2O3 are Fe2O3:73.4~74.9% by weight, BaCO3:9.2~13.8%, SrCO3:6.3~9.7%, CoO:5.7~5.9%, Gd2O3:0.3~0.8%; or Fe2O3:73.4~74.9%, BaCO3:9.2~13.8%, SrCO3:6.3~9.7%, CoO:5.7~5.9%, Sm2O3:0.3~0.8% The main ingredient is powdered, and mixed and stirred into a powder;

[0025] 2) In step 2, put the powder obtained in step 1 into a planetary ball mill, and add deionized water of equal mass for ball milling. The mass ratio of grinding medium to powder is 4:1~5:1 (preferably 5: 1), the ball milling time is 1~4 hours to make it evenly mixed;

[0026] 3) Step 3: Dry the powder obtained in Step 2, and put it into a sintering furnace for pre-firing after sieving. The pre-firing temperature is 800~1000℃, and the holding time is 1~4 hours;

[0027] 4) Step 4, put the pow...

Embodiment 1

[0035] Embodiment 1, proportioning molecular formula: Sr 3x Ba 3(1-x) co 2 Gd y Fe 24-y o 41 (where x=0.4, y=0.05); ingredient formula: Fe 2 o 3 :73.79%, BaCO 3 :13.71%, SrCO 3 : 6.37%, CoO: 5.78%; Gd 2 o 3:0.35%.

Embodiment 2

[0036] Embodiment 2, proportioning molecular formula: Sr 3x Ba 3(1-x) co 2 Gd y Fe 24-y o 41 (where x=0.4, y=0.1); ingredient formula: Fe 2 o 3 :73.49%, BaCO 3 :13.68%, SrCO 3 : 6.36%, CoO: 5.77%; Gd 2 o 3 :0.70%.

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Abstract

The invention relates to ferrite magnetic materials, and specifically relates to a Z-type hexagonal ferrite material and a preparation method thereof. The Z-type hexagonal ferrite has a molecular formula of Sr3xBa3(1-x)Co2GdyFe24-yO41 or Sr3xBa3(1-x)Co2SmyFe24-yO41, wherein x is greater than 0.4 and smaller than 0.6, and y is greater than 0.05 and smaller than 0.1. According to the invention, with the introduction of rare earth ions, ion interactions can be enhanced, total magnetic moment can be increased, and saturation magnetization can be increased. Also, anisotropy constant is improved, such that higher magnetic permeability can be obtained under a high-frequency condition.

Description

technical field [0001] The invention relates to a ferrite magnetic material, in particular to a Z-type hexagonal ferrite material and a preparation method thereof. Background technique [0002] With the development of communication towards high frequency and the rapid development of high-speed digital circuits in recent years, the operating frequency of various electronic devices is getting higher and higher. While modern technology brings us more surprises and convenience, it also brings us a lot of troubles. The mutual interference of electromagnetic waves makes it impossible for the TV to clearly receive a certain required signal, and it is difficult to tune the radio. The harsh electromagnetic environment often makes electronic and electrical equipment Can not work normally, or even malfunction and cause serious consequences. As a result, the problem of electromagnetic interference is becoming more and more prominent, the electromagnetic environment is deteriorating day...

Claims

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Application Information

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IPC IPC(8): C04B35/32C04B35/622
Inventor 汪南东颜铄清李启凡刘卫沪冯则坤李慧雯
Owner 广东领益智造股份有限公司
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