Pochłanianie fal elektromagnetycznych przez kompozyty z cementu wapniowo-siarczanoglinianowego z nanopłytkami grafenu

• Autorzy: Xingjun L.V. , Duan Yuping , Chen Guoqing

Identyfikatory

DOI

10.32047/CWB.2021.26.1.6

Warianty tytułu

EN

Electromagnetic wave-absorbing properties of graphene nanoplatelets - calcium sulfoaluminate cement - based composites

• Języki publikacji: PL EN

Abstrakty

PL

W pracy badano kompozyty z cementu wapniowo-siarczanoglinianowego z dodatkiem nanopłytek grafenu. Zbadano wpływ zawartości nanopłytek grafenu i grubości próbek na właściwości absorpcyjne kompozytów oraz zbadano związany z tym mechanizm absorpcji. Wyniki wykazały, że próbka o grubości 25 mm wykazywała dobrą absorpcję fal elektromagnetycznych, przy zawartości ok. 0,06% nanopłytek grafenu. Minimalna wartość tłumienia wskutek odbicia była równa -30,8 dB przy 8,7 GHz, a szerokość badanego pasma [<-5 dB] wynosiła 9,5 GHz. Zwiększenie udziału nanopłytek grafenu do 0,08%, nie poprawia znacząco absorpcji fal elektromagnetycznych. Właściwości pochłaniania można poprawić, zwiększając grubość próbki. Próbka o grubości 35 mm wykazała bardzo dobre właściwości absorpcji szerokopasmowej.

EN

In this paper, graphene nanoplatelets [GNPs] in calcium sulfoaluminate cement-based composites were prepared. The effects of graphene nanoplatelets content and sample thickness on the absorbing properties of composites were studied and the related mechanism was investigated. The experimental results have shown that the sample with a thickness of 25mm exhibited good electromagnetic wave [EMW] absorption, when the content of graphene nanoplatelets is 0.06%. The minimum reflectivity is -30.8 dB at 8.7 GHz, and the cumulative bandwidth [< -5 dB] is 9.5 GHz. When the content of GNPs is increased to 0.08%, the EMW absorption property of the sample does not enhance remarkably. The absorbing property can be improved by adjusting the thickness of sample. The specimen with a thickness of 35 mm performed excellent broadband absorption characteristics.

Słowa kluczowe

PL

nanopłytka grafenu; cement wapniowo-siarczanoglinianowy; kompozyt cementowy; pochłanianie promieniowania; fala elektromagnetyczna

EN

graphene nano-platelets; calcium sulfoaluminate cement; CSA; cement-based composite; absorbing properties; electromagnetic wave

• Wydawca: Fundacja Cement, Wapno, Beton
• Czasopismo: Cement Wapno Beton
• Rocznik: 2021
• Tom: R. 26, nr 1
• Strony: 55--66
• Opis fizyczny: Bibliogr. 43 poz., il., tab.

Twórcy

autor

Xingjun L.V.

• School of Civil Engineering, Dalian University of Technology, Dalian, P.R. China

autor

Duan Yuping

• Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, P.R. China)

autor

Chen Guoqing

• Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, P.R. China)

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).