Wave-absorbing wall brick and preparation method thereof

A technology of wall tiles and tiles, which is applied in the field of new electromagnetic functional materials, can solve the problems of poor weather resistance and corrosion resistance, and achieve the effect of improving strength, low cost, and low cost

Active Publication Date: 2018-05-11
HUNAN AEROSPACE MAGNET & MAGNETO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Second, in addition to ensuring the absorbing performance, the wave-absorbing material technology in the military field often emphasizes thinness and lightness. As for civilian use, there is no need to consider too much thinness and lightness, but the cost must be low to be practical.
Third, the previous absorbing materials used a large amount of metals and organic substances, which are poor in weather resistance and corrosion resistance.
However, its application in the field of microwave-absorbing materials has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of MnZn ferrite recovery material and BSi glass wave-absorbing wall brick, its manufacture steps are as follows:

[0030] (1) Perform impurity removal treatment on the recycled MnZn ferrite material, and pass the recovered wet wet material through a 60-mesh sieve to remove various garbage impurities mixed in the recovery process.

[0031] (2) Mix the recovered MnZn ferrite slurry with BSi glass, in which the MnZn ferrite material accounts for 60wt%, and the BSi glass accounts for 40wt%, and use a ball mill to grind the material. The output particle size test is D50=1.3μm.

[0032] (3) The mixture of recycled MnZn ferrite and BSi glass is added into PVA, dried and granulated, and dry-pressed to obtain a green tile. The molding pressure is 8 MPa.

[0033] (4) Sinter the formed tile green body in a kiln, the sintering temperature is 1200°C, the holding time is 3 hours, the heating rate is 1°C / h, the cooling rate is 3°C / h, and the surface is deburred. For the final ...

Embodiment 2

[0036] A kind of MnZn ferrite recovery material and BSi glass wave-absorbing wall brick, its manufacture steps are as follows:

[0037] (1) Perform impurity removal treatment on the recycled MnZn ferrite material, and pass the recovered wet wet material through a 60-mesh sieve to remove various garbage impurities mixed in the recovery process.

[0038] (2) Mix the recovered MnZn ferrite slurry with BSi glass, in which the MnZn ferrite material accounts for 95wt%, and the BSi glass accounts for 5wt%, and use a ball mill to grind the material. The output particle size test is D50=1.4μm.

[0039] (3) The mixture of recycled MnZn ferrite and BSi glass is added into PVA, dried and granulated, and dry-pressed to obtain a green tile. The molding pressure is 8 MPa.

[0040] (4) Sinter the formed tile green body in a kiln, the sintering temperature is 1200°C, the holding time is 3 hours, the heating rate is 1°C / h, the cooling rate is 3°C / h, and the surface is deburred. For the final p...

Embodiment 3

[0043] A kind of MnZn ferrite recovery material and BSi glass wave-absorbing wall brick, its manufacture steps are as follows:

[0044] (1) Perform impurity removal treatment on the recycled MnZn ferrite material, and pass the recovered wet wet material through a 60-mesh sieve to remove various garbage impurities mixed in the recovery process.

[0045] (2) Mix the recovered MnZn ferrite slurry with BSi glass, in which the MnZn ferrite material accounts for 70wt% and the BSi glass accounts for 30wt%. Ball milling is used, and the output particle size test is D50=1.2μm.

[0046] (3) The mixture of recycled MnZn ferrite and BSi glass is added into PVA, dried and granulated, and dry-pressed to obtain a green tile. The molding pressure is 8 MPa.

[0047] (4) Sinter the formed tile green body in a kiln, the sintering temperature is 1200°C, the holding time is 3 hours, the heating rate is 1°C / h, the cooling rate is 3°C / h, and the surface is deburred. For the final product, the sinte...

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Abstract

The invention discloses a wave-absorbing wall brick and a preparation method thereof. The wall brick is formed by mixing, moulding and sintering MnZn ferrite recycling materials and BSi glass, and thewall brick is capable of absorbing electromagnetic wave within a range of 0.5-2 GHz. The formula of the wall brick comprises 60-95 wt% of MnZn ferrite recycling materials and 5-40 wt% of BSi glass, wherein particle size of the MnZn ferrite recycling materials is D50=0.5-2.3 microns. After sintering is conducted, wave-absorbing capability of a magnetic brick with a thickness of 5.5mm within a frequency range of 0.5-2 GHz can reach more than 23dB.

Description

technical field [0001] The invention relates to the technical field of novel electromagnetic functional materials, in particular to a wave-absorbing wall brick and a preparation method thereof. Background technique [0002] At present, electromagnetic radiation is becoming more and more serious, and many special buildings have raised the requirement of anti-electromagnetic interference. Because microwave-absorbing materials belonged to military technology in the past, they have begun to be used in civilian fields in recent years with the increase of civilian frequencies. First of all, the traditional design methods of absorbing materials are used to using very expensive materials, such as carbonyl iron powder, carbonyl iron fiber, flake alloy powder, ferrite powder, carbon fiber, glass beads, epoxy resin and so on. Second, in addition to ensuring the absorbing performance, the technology of absorbing materials in the military field often emphasizes thinness and lightness. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/38C04B35/622C04B35/64
CPCC04B35/2658C04B35/62204C04B35/64C04B2235/36C04B2235/5436C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/96
Inventor 颜铄清汪斌龙湘南陈玉寇清胡盛青张铁军
Owner HUNAN AEROSPACE MAGNET & MAGNETO
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