RADIO ABSORBING COMPOSITE MATERIAL

The radio absorbing composite material is designed for absorbing electromagnetic radiation at on-shore, aviation, space and marine technical facilities for lowering their radiolocation observability, and for absorption of electromagnetic radiation by screening devices, by absorbing claddings and cas...

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Bibliographische Detailangaben
1. Verfasser: MOLDOSANOV Kamil, Abdikerimovich
Format: Patent
Sprache:eng ; rus
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Zusammenfassung:The radio absorbing composite material is designed for absorbing electromagnetic radiation at on-shore, aviation, space and marine technical facilities for lowering their radiolocation observability, and for absorption of electromagnetic radiation by screening devices, by absorbing claddings and casings, by anechoic measurement chambers, and by means for public protection against non-ionizing radiations. The technical objective of the invention is widening of functional capabilities of the radio absorbing composite material while improving efficiency of absorption of radio wave radiation and broadening the absorbed frequency band in the radio wave radiation range. The technical objective is attained by provision of a radio absorbing composite material comprising a finely dispersed electromagnetic radiation absorbent and a radio-transparent binder, wherein the finely dispersed electromagnetic radiation absorbent is made of nanoparticles of aluminium or aluminium-based alloys with a passivating oxide film on the surface, the content of the finely dispersed electromagnetic radiation absorbent in the radio absorbing composite material being 30-70% by volume, the balance being the radio-transparent binder, the diameter of the non-oxidized part (core) of the nanoparticle being determined by the formula D≈11.04∙E, where D is diameter of the non-oxidized part (core) of the nanoparticle (nm); Eis energy of vibration mode dominating in density-of-state distribution of vibration modes by energy in aluminium (meV). As the aluminium-based alloy, a manganese-doped aluminium alloy is used. As the aluminium-based alloy, a chromium-doped aluminium alloy is used. As the aluminium-based alloy, a vanadium-doped aluminium alloy is used. Радиопоглощающий композиционный материал предназначен для поглощения электромагнитного излучения в объектах наземной, авиационной, космической и морской техники для снижения их радиолокационной заметности, а также для поглощения электромагнитного излучения в экранирующих устройствах, в поглощающих облицовках и корпусах, в безэховых измерительных камерах и в средствах защиты населения от неионизирующих излучений. Техническая задача изобретения - расширение функциональных возможностей радиопоглощающего композиционного материала при повышении эффективности поглощения радиоволнового излучения и расширении полосы поглощаемых частот в диапазоне радиоволнового излучения. Поставленная техническая задача решается за счёт того, что в радиопоглощающем ком