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Anti-electromagnetic interference manganese zinc ferrite material and preparation method thereof

A manganese-zinc ferrite, anti-electromagnetic interference technology, applied in the field of ferrite materials and its preparation, can solve the problems of high cost, environmental pollution, low resistivity of manganese-zinc ferrite, etc.

Active Publication Date: 2014-04-02
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the disadvantages that general manganese-zinc ferrite has low resistivity and cannot be used as an anti-EMI material in the high-frequency field, and the use of nickel-zinc ferrite causes serious environmental pollution and high cost. Manganese-zinc ferrite material that replaces nickel-zinc ferrite in the high-frequency field, is low in cost, and has relatively little environmental pollution

Method used

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  • Anti-electromagnetic interference manganese zinc ferrite material and preparation method thereof
  • Anti-electromagnetic interference manganese zinc ferrite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] with Fe 2 o 3 44mol%, MnO 53.5mol% and ZnO 2.5mol% as the main components, weighed the raw materials, added deionized water and put them into a sand mill for sand milling, and the sand milling time was 40 minutes to obtain a slurry. Secondly, the slurry is subjected to spray granulation to prepare granular material. Thirdly, pre-burn the above pellets in a rotary kiln at a temperature of 950° C. and a time of 7 hours. Fourth, add the auxiliary component raw materials weighed in proportion to the above-mentioned calcined material, in terms of the total weight of the main component: CaCO 3 0.1wt%, Nb 2 o 5 0.02wt%, MgO 0.12wt% and V 2 o 5 0.03wt%, and then add deionized water to the mixture and put it into a sand mill for secondary sand grinding. The secondary sand grinding time is 2 hours to obtain a secondary sand abrasive with an average particle size of solid particles of 1.0-1.1 μm. Fifth, after adding PVA and defoamer n-octanol at a weight ratio of 20:1 to...

Embodiment 2

[0032] The difference from Example 1 is that Fe 2 o3 43.5mol%, MnO53.5mol% and ZnO 3mol% are the main components.

[0033] The obtained manganese zinc ferrite material is tested with RM-220 resistivity meter to have a resistivity of 10 4 Ω·m.

[0034] The prepared manganese zinc ferrite material is passed through an X fluorescence analyzer to detect whether the final composition of the ferrite is consistent with the design composition. After the composition test is correct, use the ferrite material to make a magnetic ring with a size of 5mm×2mm×10mm, and use the IWATSU-4291B impedance analyzer to test the impedance of the ferrite under the conditions of 25°C, 30MHz, 100MHz, and 300MHz. 30MHz, impedance |Z| is 31Ω; 100MHz, impedance |Z| is 65Ω; 300MHz, impedance |Z| is 118Ω.

Embodiment 3

[0036] The difference from Example 1 is that Fe 2 o 3 44.5mol%, MnO53.3mol% and ZnO 2.2mol% are the main components.

[0037] The obtained manganese zinc ferrite material is tested with RM-220 resistivity meter to have a resistivity of 10 4 Ω·m.

[0038] The prepared manganese zinc ferrite material is passed through an X fluorescence analyzer to detect whether the final composition of the ferrite is consistent with the design composition. After the composition test is correct, use the ferrite material to make a magnetic ring with a size of 5mm×2mm×10mm, and use the IWATSU-4291B impedance analyzer to test the impedance of the ferrite under the conditions of 25°C, 30MHz, 100MHz, and 300MHz. 30MHz, impedance |Z| is 35Ω; 100MHz, impedance |Z| is 75Ω; 300MHz, impedance |Z| is 129Ω.

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Abstract

The invention discloses an anti-electromagnetic interference manganese zinc ferrite material and a preparation method thereof. The material comprises main components and auxiliary components, wherein the main components comprise, by mole percent, 43.5-44.5 mol% of Fe2O3, 53-56 mol% of MnO, and 2-3 mol% of ZnO, and the auxiliary components comprise CaCO3, Nb2O5, MgO, and V2O5. The material of the invention overcomes the disadvantage that common manganese zinc ferrite is less in resistivity, and can not be used as anti-EMI materials in high frequency fields; when compared with nickel zinc ferrite, the material of the invention is less in environment pollution, and low in cost, and can substitute for nickel zinc ferrite to be used as an anti-EMI materials in high frequency fields.

Description

technical field [0001] The invention relates to a ferrite material and a preparation method thereof, in particular to an anti-electromagnetic interference manganese-zinc ferrite material and a preparation method thereof. Background technique [0002] With the increasing popularity of various electronic devices, TV networks, program-controlled switches, mobile communication machines, and office automation, electromagnetic interference has increasingly become a major environmental pollution that people worry about. Electromagnetic Interference, referred to as EMI, is becoming more and more harmful as many electronic products tend to develop in the direction of high speed, broadband, high sensitivity, high density, miniaturization and high frequency. The soft ferrite material belongs to the magnetic medium type wave-absorbing material. The use of soft ferrite components to reduce the electromagnetic wave interference of the conductor has become an important way to suppress elec...

Claims

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Application Information

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IPC IPC(8): C04B35/38C04B35/622
Inventor 吕飞雨张小杭
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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