کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5490268 | 1524788 | 2017 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation and microwave-absorbing property of EP/BaFe12O19/PANI composites
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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
In this paper, we introduced expanded perlite (EP) into the system of ferrite composites for the first time. By sol-gel self-propagating combustion method, expanded perlite/barium ferrite (EP/BaFe12O19) was prepared, and then ternary composites of expanded perlite/barium ferrite/polyaniline (EP/BaFe12O19/PANI) were obtained by in-situ oxidative polymerization of aniline on EP/BaFe12O19 mixture. Although, as is well known, the values of saturation magnetization (Ms), remnant magnetization (Mr) and coercivity (Hc) of composites are all lower than the pure BaFe12O19 particles owing to the existence of the nonmagnetic EP and PANI, the EP/BaFe12O19/PANI composites exhibit absorption characteristics at the range of 2-18Â GHz, the effective absorption bandwidth (less than â4Â dB) reached 12.12Â GHz and the minimum reflection loss of â5.66Â dB at 8.48Â GHz with only 2Â mm thickness of absorbing layer. So the composites could resist urban electromagnetic pollution, such as wireless network, communication and so on, effectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 433, 1 July 2017, Pages 1-7
Journal: Journal of Magnetism and Magnetic Materials - Volume 433, 1 July 2017, Pages 1-7
نویسندگان
Huixia Feng, Dezhong Bai, Lin Tan, Nali Chen, Yueyi Wang,