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MnZn ferrite material for broadband anti -electromagnetic-interference and preparation method thereof

An anti-electromagnetic interference, manganese-zinc ferrite technology, applied in inductor/transformer/magnet manufacturing, magnetic materials, shielding materials, etc., can solve the problems of environmental pollution and high manufacturing costs, and achieve the effect of reducing manufacturing costs

Active Publication Date: 2012-09-26
NANTONG HUAXING MAGNETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Soft magnetic ferrite anti-interference materials mainly include nickel-zinc ferrite, manganese-zinc ferrite and magnesium-zinc ferrite. Nickel-zinc ferrite materials have high manufacturing costs, and the main raw material is nickel oxide at 200,000 yuan per ton. At the same time, nickel-zinc materials contain metal elements such as nickel, cadmium, and cobalt, which will pollute the environment

Method used

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  • MnZn ferrite material for broadband anti -electromagnetic-interference and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A manganese-zinc ferrite material for broadband anti-electromagnetic interference. Its formula is composed of: 42.05 mol% of ferric oxide, 32.51 mol% of manganese tetraoxide, 20.35 mol% of zinc oxide, and 1.68 mol% of copper oxide mol%, calcium oxide 0.41 mol%.

[0031] Its preparation process is:

[0032] (1) Mixing of ingredients: Add the raw materials ferric oxide, manganese tetraoxide and zinc oxide into a conical mixer and mix evenly, then send them into a vibration mill for strong mixing, so that the average particle size of the powder after mixing and vibration grinding is 1.1 μm;

[0033] (2) Granulation: send the mixed material powder into the silo of the granulator, open the granulator, adjust the rolling pressure to 8mPa, so that the rolled material powder particles are cylindrical;

[0034] (3) Pre-burning: The temperature in the high temperature zone of the rotary kiln rises to 900°C, and the feeder is turned on to feed the pellets evenly into the rotary k...

Embodiment 2、 Embodiment 3

[0040] A manganese-zinc ferrite material used for broadband anti-electromagnetic interference, its formula composition according to mole percentage is shown in Table 1:

[0041] Table 1: Manganese zinc ferrite material formula composition

[0042]

Ferric oxide

Trimanganese tetraoxide

Zinc oxide

Copper oxide

Calcium Oxide

Example 2

44.05mol%

34.01mol%

20.23mol%

1.36mol%

0.35mol%

Example 3

46.05mol%

32.51mol%

20.13mol%

1.05mol%

0.26mol%

[0043] The production process is basically the same as in Example 1, and the specific process conditions correspond to Table 2 one by one:

[0044] Table 2: Manufacture process of MnZn ferrite material

[0045]

[0046] The dispersant used in the above examples is a special dispersant for magnetic materials, model BWY-507, and the manufacturer is Zhejiang Linan Yueyang Auxiliary Co., Ltd.; the defoamer is n-octanol, with a content greater than or e...

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Abstract

The invention discloses anti-broadband-electromagnetic-interference MnZn ferrite material which comprises, by molar percentage, 42.05-46.05 % of iron sesquioxide, 32.51-35.51 % of manganous manganic oxide, 18.55-20.35 % of zinc oxide, 1.05-1.68 % of copper oxide and 0.25-0.45 % of calcium oxide. A preparation method includes weighing and mixing, granulating, calcinating, coarsely grinding, secondarily weighting and fine grinding, spray granulating, and thirdly weighting and inspecting and packaging. Preparation cost of soft magnetic ferrite anti-interference material is reduced effectively. The MnZn ferrite material has fine broadband interference resistance from low frequency to high frequency and integrates the characteristics of NiZn and MgZn materials, and the materials can replace NiZn material and MnZn simultaneously. The MnZn ferrite material does not contain metal elements such as nickel, cadmium and cobalt, so that the environment cannot be polluted, and the MnZn ferrite is more environment-friendly than the NiZn material.

Description

technical field [0001] The invention relates to the technical field of an anti-interference magnetic core material and a manufacturing method thereof, in particular to a manganese-zinc ferrite material for broadband anti-electromagnetic interference and a manufacturing method thereof. Background technique [0002] Today's society has entered the era of electronic information, with the rapid development of information highways, satellite communications, mobile communications, and computer applications, electronic products are increasingly trending toward high speed, broadband, high sensitivity, high density, and miniaturization. However, the phenomenon of electromagnetic interference is becoming more and more serious, and has become an obvious obstacle affecting the normal operation of the system, and even causes great harm to personal safety and military security. [0003] Soft magnetic ferrite is a magnetic medium type wave-absorbing material, and the corresponding anti-ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/38C04B35/622
CPCC04B35/622C01G49/0072C04B35/26C04B35/6261C04B35/62655C04B2235/3208C04B2235/3262C04B2235/3281C04B2235/3284C04B2235/725H01F1/344H05K9/0075H01F1/34H01F1/36H01F41/02
Inventor 杨美华
Owner NANTONG HUAXING MAGNETIC MATERIAL
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