Graphene/ferric ferrous oxide composite powder modified wave-absorbing cement

A technology of ferric tetroxide and composite powder, which is applied in the field of wave-absorbing cement 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

[0028] A wave-absorbing cement modified by graphene / ferric oxide composite powder, comprising graphene / ferric oxide composite powder, expanded polystyrene and Portland cement, the graphene / ferric oxide In the wave-absorbing cement modified by iron composite powder, the filling rate of expanded polystyrene is 40vol%, the particle diameter of expanded polystyrene is 2mm, and the volume content of graphene / ferric oxide composite powder is 2 %.

Embodiment 2

[0030] A wave-absorbing cement modified by graphene / ferric oxide composite powder, comprising graphene / ferric oxide composite powder, expanded polystyrene and Portland cement, the graphene / ferric oxide In the wave-absorbing cement modified by iron composite powder, the filling rate of expanded polystyrene is 70vol%, the particle diameter of expanded polystyrene is 6mm, and the volume content of graphene / ferric oxide composite powder is 5 %.

Embodiment 3

[0032] A wave-absorbing cement modified by graphene / ferric oxide composite powder, comprising graphene / ferric oxide composite powder, expanded polystyrene and Portland cement, the graphene / ferric oxide In the wave-absorbing cement modified by iron composite powder, the filling rate of expanded polystyrene is 50vol%, the particle diameter of expanded polystyrene is 4mm, and the volume content of graphene / ferric oxide composite powder is 3 %.

[0033] In Example 1-3 of the present invention, the cement is doped with graphene / ferric oxide composite powder and expanded polystyrene, and in the microwave frequency band of 8-18GHz, the absorption of the whole frequency band reaches above -14.2dB, Enhance the absorbing performance of cement.

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Abstract

Graphene/ferric ferrous oxide composite powder modified wave-absorbing cement is disclosed. The wave-absorbing cement includes graphene/ferric ferrous oxide composite powder, expanded polystyrene and Portland cement. In the wave-absorbing cement, the filling rate of the expanded polystyrene is 40-70 vol%, the particle size of the expanded polystyrene is 2-6 mm, and the volume content of the graphene/ferric ferrous oxide composite powder is 2-5%. The graphene/ferric ferrous oxide composite powder and the expanded polystyrene are doped in the cement, and absorption in the whole frequency range in a microwave frequency range of 8-18 GHz reaches -14.2 dB or above, and therefore the wave-absorbing property 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 modified by graphene / ferric oxide composite powder. Background technique [0002] Cement material is a variety of composite materials containing a variety of metal oxides, which itself has a certain wave-absorbing performance, but the absorption of electromagnetic waves by cement materials mainly depends on the electromagnetic loss of internal oxides, and the wave-absorbing performance is relatively low. After adding the traditional wave absorbing agent into the cement matrix, although the wave absorbing performance of the cement material can be improved, the degree of matching with the spatial wave impedance is greatly reduced, so the degree of improvement of the wave absorbing performance is not large. If wave-transparent particles are added to the cement matrix, although the addition of wave-transparent materials reduces the content of wave-absorb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/10C04B14/36C04B14/30
CPCC04B28/04C04B20/1033C04B40/0042C04B2111/00258
Inventor 过冬
Owner 过冬
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