نویسندگان

1 دانشگاه امام علی (ع)، دانشکده علوم پایه، تهران، ایران.

2 دانشگاه تربیت مدرس، دانشکده مهندسی مواد، تهران، ایران.

3 دانشگاه تبریز، دانشکده مهندسی مواد، تبریز، ایران.

چکیده

 در این تحقیق به بررسی خواص ساختاری، مغناطیسی و جذب امواج مایکروویو نانوکامپوزیت های جاذب ساخته شده از طریـق پوشـش دهـی الیـاف
کربنی
) (CFsبا نانوذرات مگنتیت ) (Fe3O4نوسط رسوب دهی الکتروفورتیک ) (EPDبهبود یافته، پرداخته شده است. ابتدا نانوذرات مگنتیـت بـه روش هـم رسـوبی
تهیه شده و سپس به وسیله ی فرآیند رسوب دهی الکتروفورتیک بهبود یافته روی
CFsپوشش داده شد. بررسی خواص مغناطیسی نشان داد کـه مقـادیر مغنـاطش
اشباع و وادارندگی نانوپودر مگنتیت پس از انجام فرآیند رسوب دهی الکتروفورتیک به ترتیـب از 72,3بـه 33,1
emu/g از 4,9بـه 168 Oe بـرای نانوکامپوزیـت
مگنتیت/الیاف کربنی می رسد. نتایج آزمون جذب امواج مایکروویو در محدوده ی بسـامدی 8,2تـا 12,4
GHzنشـان داد کـه میـزان جـذب مـوج نانوکامپوزیـت
مگنتیت/الیاف کربنی به شدت به ضخامت آن بستگی دارد. مقدار بیشینه ی جذب موجی در حدود -10,2
dBدر 10 GHzبا پهنای باند جـذب مـوثری در حـدود
2
GHzبرای نمونه ی با ضخامت 2 میلیمتر به دست آمد 

کلیدواژه‌ها

عنوان مقاله [English]

Synthesis of the Microwave Absorber Fe3O4/CFs Nanocomposite Via Electrophoretic Deposition With a Wide Effective Absorption Bandwidth

نویسندگان [English]

  • Mahdi Gholampour 1
  • Farid Movassagh-Alanagh 2
  • Hamed Salimkhani 3

1 Imam Ali university, Department of physic, Tehran, Iran.

2 Tarbiat Modares University, Department of Materials Engineering, Tehran, Iran.

3 Tabriz University, Department of Mechanical Engineering, Tabriz, Iran.

چکیده [English]

 In this study, the structural, magnetic and microwave absorption properties of a microwave absorber
composite fabricated through electrophoretic deposition (EPD) of Fe
3O4 nano-particles on carbon fibers (CFs) were
studied. Firstly, co-precipitation method was employed to synthesize the Fe
3O4 nano-particles. Then, these assynthesized Fe3O4 nano-particles were successfully deposited on CFs using a modified EPD process. The measured
magnetic properties of the as-synthesized Fe
3O4 nano-powder and the Fe3O4/CFs nano-composite showed that the
saturation magnetization of the bare Fe
3O4 was decreased from 72.3 to 33.1 emu/g for the Fe3O4/CFs nano-composite
and also its corecivity was increased from 4.9 to 168 Oe for the nano-composite. The results of reflection loss (RL)
measurements in the 8.2- 12.4 GHz frequency range indicated that the RL of Fe
3O4/CFs nano-composites are
significantly influenced by their thickness. The maximum RL value of -10.2 dB at 10 GHz with an effective absorption
bandwidth about 2 GHz was obtained for the sample with the thickness of 2 mm
 

کلیدواژه‌ها [English]

  • Carbon Fibers
  • Microwave absorption
  • nano-composite
  • Fe3O4 nano-particles
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