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Ferrite material and preparation method thereof

A ferrite material, MnZn ferrite technology, applied in the field of magnetic materials, can solve the problems of increasing production cost and increasing process difficulty

Active Publication Date: 2018-11-27
XIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to obtain ideal properties, ferrite materials are currently prepared by high sintering temperature, which will significantly increase the difficulty of the process and increase the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] Based on the above, the preparation method of the ferrite material provided in the embodiment of the present invention includes: Fe 2 o 3 , Mn 3 o 4 , ZnO, Bi 2 o 3 、Co 2 o 3 , CaO and Nb 2 o 5 Mixed, compacted and then sintered.

[0032] In order to make the raw materials of manganese zinc ferrite easier to contact and react, Fe 2 o 3 , Mn 3 o 4 , ZnO, Bi 2 o 3 、Co 2 o 3 , CaO and Nb 2 o 5It is mixed in the form of particles. The particle size of the particles can be properly selected, for example, 60 μm, 50 μm, 30 μm or even smaller. Further, the mixing can be performed by vigorous stirring, grinding and the like. In particular, grinding and mixing can not only achieve particle size refinement, but also enhance mixing uniformity.

[0033] In addition, in a preferable example, Fe as the main component 2 o 3 , Mn 3 o 4 , ZnO is pre-mixed. That is, the Fe 2 o 3 , Mn 3 o 4 , ZnO, Bi 2 o 3 、Co 2 o 3 , CaO and Nb 2 o 5 Before mixing, the ...

Embodiment 1

[0045] 1) Ingredients: the proportion of each component of the main formula, Fe 2 o 3 : 69.4wt%, Mn 3 o 4 : 15.4wt%, ZnO: 15.2wt%. Calculated on the basis of a total mass of 30g, Fe 2 o 3 20.82g, Mn 3 o 4 is 4.62g, and ZnO is 4.56g. Ball 450g, add appropriate amount of deionized water, wet grinding for 3h.

[0046] 2) Pre-firing: Dry the ball-milled slurry at 120°C, then heat to 950°C, and keep it warm for 2 hours to obtain 26.973g of the raw material of the main formula.

[0047] 3) Composite doping: add 0.04wt% Bi to the 26.973g raw material 2 o 3 , 0.03 wt% Co 2 o 3 , 0.01wt% CaO, 0.005wt% Nb 2 o 5 . Add appropriate amount of deionized water and wet mill for 10h.

[0048] 4) Granulation: drying the above slurry at 120° C., adding 10% polyvinyl alcohol (PVA) to granulate.

[0049] 5) Compression ring: After granulation, use a pressure of 10MPa to pre-press into a ring of Φ16mm×Φ8mm×5mm, and then compact it with a pressure of 200MPa on a cold isostatic press....

Embodiment 2

[0053] Steps 1) to 7) are consistent with Example 1, and the highest sintering temperature is set to 1310°C.

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PUM

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Abstract

The invention belongs to the field of magnetic materials and discloses a ferrite material and a preparation method thereof. The ferrite material is mainly high-magnetic-conductivity manganese zinc ferrite prepared at a low sintering temperature. The manganese zinc ferrite is prepared from raw materials by mixing, compacting and sintering. The manganese zinc ferrite comprises, by weight, 68.8-69.6wt% of Fe2O3, 15.1-15.8% of Mn3O4, 15.1-15.5% of ZnO, 0.02-0.05wt% of Bi2O3, 0.01-0.04wt% of Co2O3, 0.01-0.03wt% of CaO and 0.005-0.02wt% of Nb2O5. The ferrite material has advantages of high initial magnetic conductivity and high density and can be prepared through sintering at a reduced sintering temperature.

Description

technical field [0001] The invention relates to the field of magnetic materials, in particular to a ferrite material and a preparation method thereof. Background technique [0002] High permeability MnZn ferrite material is widely used and is a functional soft magnetic material. It is in a dominant position in the application of communication, electronic instrument, computer and other fields. [0003] Now that society is in the information age, the replacement frequency of communication and network facilities such as mobile phones is accelerating, and the demand for high-permeability MnZn ferrite core materials used in pulse transformers and magnetic recording media is also increasing. many. [0004] Common lighting transformers and electronic energy-saving ballasts in daily life are also inseparable from high-permeability ferrite materials. With the substantial increase in the demand for high-performance electronic components, high-permeability manganese-zinc ferrite mat...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
CPCC04B35/2633C04B35/622C04B2235/3208C04B2235/3251C04B2235/3267C04B2235/3272C04B2235/3275C04B2235/3298C04B2235/602C04B2235/656C04B2235/6562C04B2235/6567C04B2235/77
Inventor 周廷栋冯宁博刘文斌宋天秀蔡擎王宏斌
Owner XIHUA UNIV