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Spinel composite ferrite material and preparation method thereof

A ferrite material and spinel technology, applied in the fields of magnetic materials, inorganic material magnetism, inductance/transformer/magnet manufacturing, etc. Coercive force, improving reliability, reducing the effect of excitation current

Active Publication Date: 2017-07-14
江西尚朋电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the performance index of TT86-6000 Ni-based ferrite announced by Trans Teck (EMS) in the United States is: saturation magnetization M s =398±10%kA / m, remanence B r =380mT, coercive force H c =119A / m, ferromagnetic resonance linewidth ΔH(X-band)ε (X-band)-4 , dielectric constant ε'(X-band) = 12.5±5%, Curie temperature T c =363℃, the density parameter of this product is not given; at the same time, the performance index of XN48A NiZn ferrite published by Mianyang Xici Technology Co., Ltd. is: saturation magnetization M s =382±5%kA / m, ferromagnetic resonance linewidth ΔH(X-band)ε (X-band)-4 , dielectric constant ε'(X-band) = 13.0, Curie temperature T c >430℃, density d b =5.24g / cm 3 , the coercive force H of the product is not given c and remanence B r parameter

Method used

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  • Spinel composite ferrite material and preparation method thereof
  • Spinel composite ferrite material and preparation method thereof
  • Spinel composite ferrite material and preparation method thereof

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preparation example Construction

[0057]In the spinel composite ferrite material of the present invention, the main component is calculated by oxide mole percentage, and the additive components are calculated by main component mass percentage. The present invention has low loss, high Curie temperature and low coercive force Li series and Ni series spinel composite ferrite material and preparation method thereof, comprising the following steps:

[0058] 1. Formula

[0059] The main formula of Li series adopts 67.0~74.0mol% Fe 2 o 3 , 16.0~24.0mol% ZnO, 2.0~17.0mol% Li 2 CO 3 ;

[0060] The main formula of Ni series adopts 47.0~48.5mol% Fe 2 o 3 , 18.0-19.5mol% ZnO, 25.0-26.5mol% NiO, 5.5-10.0mol% CuO;

[0061] 2. One ball milling

[0062] Mix the above Li-based and Ni-based powders in a ball mill for 2 to 4 hours;

[0063] 3. Pre-burning

[0064] Dry the ball abrasives obtained in step 2, and pre-fire them in a furnace at 800-1000°C for 2-3 hours;

[0065] 4. Doping

[0066] Mix the Li-based and Ni-...

Embodiment 1～6

[0081] Embodiments 1-6: low loss, high Curie temperature and low coercive force Li-based and Ni-based spinel composite ferrite materials and preparation methods thereof, comprising the following steps:

[0082] Embodiment 1~6:

[0083] 1. Formula

[0084] The main formula of Li series adopts 72.0mol% Fe 2 o 3 , 23.0mol% ZnO, 5.0mol% Li 2 CO 3 ;

[0085] The main formula of Ni series adopts 47.0mol% Fe 2 o 3 , 18.5mol% ZnO, 25.5mol% NiO, 9.0mol% CuO;

[0086] 2. One ball milling

[0087] Mix Li-based and Ni-based powders in step 1 evenly in a ball mill for 4 hours respectively;

[0088] 3. Pre-burning

[0089] Dry the ball mill material obtained in step 2, and pre-fire the Li-based and Ni-based powders in a furnace at 850 and 950 °C for 3 hours, respectively;

[0090] 4. Doping

[0091] The Li system obtained in step 3 is mixed with the Ni-based powder in different mass percentages,

[0092] Examples 1-6 The compounding of different mass percentages of Li series an...

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Abstract

The invention discloses a spinel composite ferrite material, and a preparation method thereof, and belongs to the technical field of ferrite material preparation. The spinel composite ferrite material is prepared from a Li series main material and a Ni series main material at a mass ratio of 1:99-99:1, and an additive; the Li series main material is prepared from 67.0 to 74.0mol% Fe2O3, 16.0 to 24.0mol% of ZnO, and 2.0 to 17.0mol% of Li2CO3; the Ni series main material is prepared from 47.0 to 48.5mol% of Fe2O3, 18.0 to 19.5mol% of ZnO, 25.0 to 26.5mol% of NiO, and 5.5 to 10.0mol% of CuO; the additive comprises, by the weight amount of oxides, 0.10 to 1.00wt% of Bi2O3, 0.01 to 0.10wt% of V2O5, 0.60 to 0.70wt% of BST, 0.001 to 0.05wt% of CaO. The spinel composite ferrite material is low in loss, high in the Curie temperature, and low in coercive force.

Description

technical field [0001] The invention belongs to the technical field of ferrite material preparation, in particular to low loss, high Curie temperature (T c ) and low coercivity (H c ) Li system and Ni system spinel composite ferrite material and preparation method thereof. Background technique [0002] Ferrite microwave devices (such as phase shifters, circulators, etc.) have the advantages of high carrying power and low loss, and have played an important role in phased array radars for a long time. With the development of radar in the direction of high frequency and light weight, more new requirements are put forward for the ferrite microwave devices used in it, such as small size and light weight, low loss, and high stability. Therefore, research on low-loss microwave ferrite materials for high-frequency bands plays a vital role in reducing the loss of microwave devices. [0003] Li-based ferrite in the spinel type has high saturation magnetization, which can well meet ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/28C04B35/622H01F1/37H01F41/00
CPCC04B35/2616C04B35/622C04B2235/3203C04B2235/3208C04B2235/3239C04B2235/3279C04B2235/3281C04B2235/3284C04B2235/3298C04B2235/77H01F1/344H01F1/37H01F41/00
Inventor 郭荣迪余忠孙科蒋晓娜兰中文王伟
Owner 江西尚朋电子科技有限公司
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