Iranian scientists design system hiding military equipment from radars

ISNA - Iranian Students' News Agency

Wed 18 May 2016 - 10:54

TEHRAN (ISNA)- Iranian researchers at Islamic Azad University, Islamshahr Branch, central Iran, have developed a nano-composite which is capable of absorbing radar electromagnetic and infrared thermal waves with high efficiency.

Hassan Hosseini, the lead author of the study, said in this research, first, SrTiO3 was synthesized as thermal infrared (TIR) absorbent and core and then BaFe12O19 as microwave absorbent was prepared on SrTiO3 via co-precipitation method as first shell.

Secondly, polyaniline (PANI) was coated on SrTiO3/BaFe12O19 NPs (NPs) via in situ polymerization by multi core-shell structures (SrTiO3/BaFe12O19/PANI). Nanometer size and structures of samples were measured by TEM, XRD and FTIR, he said, adding, Morphology of nano-composite was showed by SEM images.

The magnetic and electric properties were also performed by VSM and four probe methods, he noted.

The TIR absorption and microwave reflection loss of nano-composites were investigated at 10-40 μm and 8-12 GHz, TIR and microwave frequencies, respectively, the Iranian scientist explained.

The results showed that the SrTiO3/BaFe12O19/PANI nano-composites have good compatible electric and magnetic properties and hence the microwave absorbency show wide bandwidth properties, Hosseini added.

The infrared thermal image testing showed that the ability of infrared thermal imaging was increased by increasing SrTiO3/BaFe12O19 as core and independent to increasing PANI as final shell, he continued.

The electromagnetic waves are mainly used in military and aerospace fields for tracking planes, ships and military equipment, Hosseini noted.

Hosseini said the absorbents are capable of keep military equipment including ship, planes and soldiers hidden from from night cameras in day and night, adding they can be used in hospitals and radiation therapy centers to preserve technicians and nurses.

The results of the study appear Magnetism and Magnetic Materials Journal.

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