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Mn-Zn ferrite magnetic material with high magnetoconductivity and high impedance and method for making the same

A magnetic material, high magnetic permeability technology, applied in the field of Mn-Zn ferrite magnetic material, Mn-Zn ferrite magnetic material and its preparation field, can solve the problem of poor resistance characteristic of Mn-Zn ferrite magnetic material and other problems, to achieve the effect of high magnetic permeability, low production cost and simple process flow

Active Publication Date: 2008-07-30
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the disadvantages of poor impedance characteristics of Mn-Zn ferrite magnetic materials in the prior art in various frequency bands; provides a Mn-Zn ferrite magnetic material with high magnetic permeability and high impedance characteristics and its Preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Ingredients: according to the weight percentage of the main formula and auxiliary formula in terms of oxides, the main formula is Fe 2 o 3 is 61wt%; ZnO is 28wt%; Mn 3 o 4 is 11wt%; the auxiliary formula is CaCO 3 : 50ppm, SiO 2 : 80ppm, Bi 2 o 3 : 100ppm, MoO 3 : 400ppm.

[0024] 2. Ball milling: dry strong mixing with a V-shaped mixer, and the mixing time is 0.7 hours;

[0025] 3. Vibration grinding: Vibration grinding machine is used for vibration grinding, and the vibration grinding time is 0.6 hours;

[0026] 4. Pre-burning: The powder is directly pre-fired in an air kiln at a temperature of 600°C for 10 hours.

[0027] 5. Sanding, spray granulation, forming: use a circulating sand mill for sanding, and the sanding time is 2 hours; wherein the material: ball: water = 1:1:0.6; the average particle size of the powder after sanding It is 1.0~1.2μm. After sanding, use a spray granulator to granulate, and then use a fully automatic dry press to shape.

[0...

Embodiment 2

[0030] 1. Ingredients: according to the weight percentage of the main formula and auxiliary formula in terms of oxides, the main formula is Fe 2 o 3 69wt%; ZnO 15.5wt%; Mn 3 o 4 is 15.5wt%; the auxiliary formula is CaCO 3 : 100ppm, SiO 2 : 60ppm, Bi 2 o 3 : 250ppm, MoO 3 : 200ppm, Nb 2 o 5 100ppm, TiO 2 is 250ppm.

[0031] 2. Ball milling: dry strong mixing with a V-shaped mixer, and the mixing time is 0.7 hours;

[0032] 3. Vibration grinding: Vibration grinding machine is used for vibration grinding, and the vibration grinding time is 0.6 hours;

[0033] 4. Pre-burning: The powder is directly pre-fired in an air kiln at a temperature of 950°C for 3 hours.

[0034] 5. Sanding, spray granulation, forming: use a circulating sand mill for sanding, and the sanding time is 2 hours; wherein the material: ball: water = 1:1:0.6; the average particle size of the powder after sanding It is 1.0~1.2μm. After sanding, use a spray granulator to granulate, and then use a fully ...

Embodiment 3

[0037] 1. Ingredients: according to the weight percentage of the main formula and auxiliary formula in terms of oxides, the main formula is Fe 2 o 3 is 72wt%; ZnO is 12wt%; Mn 3 o 4 is 16wt%; the auxiliary formula is CaCO 3 : 300ppm, SiO 2 : 200ppm, Bi 2 o 3 : 400ppm, MoO 3 : 100ppm, Nb 2 o 5 150ppm, TiO 2 150ppm.

[0038] 2. Ball milling: dry strong mixing with a V-shaped mixer, and the mixing time is 0.7 hours;

[0039] 3. Vibration grinding: Vibration grinding machine is used for vibration grinding, and the vibration grinding time is 0.6 hours;

[0040] 4. Pre-burning: The powder is directly pre-fired in an air kiln at a temperature of 1200°C for 1 hour.

[0041] 5. Sanding, spray granulation, forming: use a circulating sand mill for sanding, and the sanding time is 2 hours; wherein the material: ball: water = 1:1:0.6; the average particle size of the powder after sanding It is 1.0~1.2μm. After sanding, use a spray granulator to granulate, and then use a fully ...

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Abstract

The invention relates to a Mn and Zn ferrimagnetism material and a preparation method thereof. The Mn and Zn ferrimagnetism material is made of principal ingredients and subsidiary ingredients. The weight percentages of the principal ingredients which are oxides are calculated as follows: Fe2O3 accounts for 61 percent to 75 percent by weight; ZnO accounts for 12 percent to 30 percent by weight; the rest principal ingredient is Mn3O4. The subsidiary ingredients are one or a plurality of kinds of CaCO3 accounting for 0 to 300ppm by weight; SiO2 accounting for 50ppm to 250ppm by weight; Bi2O3 accounting for 0 to 500ppm by weight. The Mn and Zn ferrimagnetism material has both high magnetic permeability and high impedance.

Description

technical field [0001] The invention relates to a Mn-Zn ferrite magnetic material, in particular to a Mn-Zn ferrite magnetic material with high magnetic permeability and high impedance characteristics and a preparation method thereof, belonging to the technical field of magnetic materials. Background technique [0002] With the continuous development of electronic technology, the overall devices in the future will be developed in the direction of miniaturization, which requires the manganese zinc ferrite materials used in these devices to have high magnetic permeability. Interference is bothering us more and more, which requires various devices in the field of electronic information to have strong anti-electromagnetic interference (EMI) capabilities, which requires the materials used for these devices to have good anti-EMI Performance, that is, the material must have high impedance characteristics in each frequency band; therefore, MnZn ferrite materials with high magnetic p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/10C04B35/26C04B35/64
Inventor 王朝明包大新王栩杨正忠
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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