کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5490224 | 1524779 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electromagnetic properties of absorber fabric coated with BaFe12O19/MWCNTs/PANi nanocomposite in X and Ku bands frequency
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Current investigation focuses on the electromagnetic properties of nonwoven fabric coated with BaFe12O19 (BHF) /MWCNTs/PANi nanocomposite in X and Ku bands. The BHF/MWCNTs and BHF/MWCNTs/PANi nanocomposites are prepared using the sol gel and in-situ polymerization methods respectively. The absorbent fabric was prepared based on applying a 40Â wt% of BHF/MWCNTs/PANi nanocomposite in silicon resin on nonwoven fabric via roller coating technique The X-ray diffraction (XRD), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM) and vector network analysis (VNA) are used to peruse microstructural, magnetic and electromagnetic features of the composite and absorber fabric respectively. The microscopic images of the fabric coated with magnetic nanocomposite shows a homogenous layer of nanoparticles on the fabric surface. The maximum reflection loss of binary nano-composite BHF/MWCNTs was measured about â28.50Â dB at 11.72Â GHz with 1.7Â GHz bandwidth (RLÂ <Â â10Â dB) in X band. Moreover in Ku band, the maximum reflection loss is â29.66Â dB at 15.78Â GHz with 3.2Â GHz bandwidths. Also the ternary nanocomposite BHF/MWCNTs/PANi exhibits a broad band absorber over a wide range of X band with a maximum reflection loss of â36.2Â dB at 10.2Â GHz with 1.5Â GHz bandwidth and in the Ku band has arrived a maximum reflection loss of â37.65Â dB at 12.84Â GHz with 2.43Â GHz bandwidth. This result reflects the synergistic effect of the different components with different loss mechanisms. As it is observed due to the presence of PANi in the structure of nanocomposite, the amount of absorption has increased extraordinarily. The absorber fabric exhibits a maximum reflection loss of â24.2Â dB at 11.6Â GHz with 4Â GHz bandwidth in X band. However, in Ku band, the absorber fabric has had the maximum absorption in 16.88Â GHz that is about â24.34Â dB with 6Â GHz bandwidth. Therefore, results indicate that the fabric samples coated represents appreciable maximum absorption value of more than 99% in X and Ku bands which can be attributed to presence of carbon and polyaniline structure in composite material.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 442, 15 November 2017, Pages 224-230
Journal: Journal of Magnetism and Magnetic Materials - Volume 442, 15 November 2017, Pages 224-230
نویسندگان
Arezoo Afzali, Vahid Mottaghitalab, Seyyed Salman Seyyed Afghahi, Mojtaba Jafarian, Yomen Atassi,