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Wave-absorbing cement structure doped with quartz and manganese dioxide

A manganese dioxide and quartz technology is applied in the field of wave-absorbing cement structure to achieve the effect of enhancing wave-absorbing performance

Inactive Publication Date: 2017-03-22
过冬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has not been reported in the field of microwave-absorbing materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] An absorbing cement structure doped with quartz and manganese dioxide, comprising a surface layer and a bottom layer;

[0030] The surface layer includes expanded polystyrene and Portland cement, the filling rate of expanded polystyrene is 40vol%, and the particle diameter of expanded polystyrene is 2mm;

[0031] The bottom layer includes quartz / manganese dioxide composite powder and Portland cement, the content of the quartz / manganese dioxide composite powder is 5%, and the volume ratio of the quartz / manganese dioxide composite powder is 6:1.

Embodiment 2

[0033] An absorbing cement structure doped with quartz and manganese dioxide, comprising a surface layer and a bottom layer;

[0034] The surface layer includes expanded polystyrene and Portland cement, the filling rate of expanded polystyrene is 70vol%, and the particle diameter of expanded polystyrene is 6mm;

[0035] The bottom layer includes quartz / manganese dioxide composite powder and Portland cement, the content of the quartz / manganese dioxide composite powder is 5-15%, and the volume ratio of the quartz / manganese dioxide composite powder is 4:1.

Embodiment 3

[0037] An absorbing cement structure doped with quartz and manganese dioxide, comprising a surface layer and a bottom layer;

[0038] The surface layer includes expanded polystyrene and Portland cement, the filling rate of expanded polystyrene is 50vol%, and the particle diameter of expanded polystyrene is 4mm;

[0039] The bottom layer includes quartz / manganese dioxide composite powder and Portland cement, the content of the quartz / manganese dioxide composite powder is 10%, and the volume ratio of the quartz / manganese dioxide composite powder is 5:1.

[0040] The wave-absorbing cement of Examples 1-3 of the present invention has a wave-absorbing capacity of more than -12db in the frequency band of 8-18GHz, which is much higher than the combination of ordinary cement and expanded polystyrene.

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Abstract

The invention discloses a wave-absorbing cement structure doped with quartz and manganese dioxide. The structure comprises a surface layer and a bottom layer. The surface layer comprises foaming polystyrene and Portland cement. The filling rate of foaming polystyrene is 40-70 vol%, and the particle diameter of foaming polystyrene is 2-6 mm. The bottom layer comprises quartz / manganese dioxide composite powder and Portland cement, the content of the quartz / manganese dioxide composite powder is 5-15%, and the volume ratio is 6:1 to 4:1 in the quartz / manganese dioxide composite powder. Foaming polystyrene is added into the surface layer of cement in a doped mode, the quartz / manganese dioxide composite powder is added into the bottom layer in a doped mode, the wave-absorbing capacity reaches -12 db or above within the 8-18 GHz frequency band, and the wave-absorbing performance of the cement is enhanced.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a wave-absorbing cement structure doped with quartz and manganese dioxide. Background technique [0002] Cement materials are a variety of composite materials containing a variety of metal oxides, which themselves have certain wave-absorbing properties, but the absorption of electromagnetic waves by cement materials mainly depends on the electromagnetic loss of internal oxides, and the wave-absorbing properties are relatively low. After adding the traditional wave absorbing agent to the cement matrix, although the wave absorbing performance of the cement material can be improved, the matching degree with the space wave impedance is greatly reduced, so the wave absorbing performance is not improved to a great extent. If the wave-transmitting particles are added to the cement matrix, although the addition of the wave-transmitting material reduces the content of the wave-absor...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B24/26C04B16/08C04B20/10C04B14/30
CPCC04B28/04C04B14/30C04B16/08C04B20/1033C04B40/0046C04B2111/00612
Inventor 过冬
Owner 过冬