کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8156083 1524840 2015 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Improved electromagnetic microwave absorption of the annealed pre-sintered precursor of Mn-Zn ferrite
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Improved electromagnetic microwave absorption of the annealed pre-sintered precursor of Mn-Zn ferrite
چکیده انگلیسی
The pre-sintered precursor of the Mn-Zn ferrites was used as starting materials to make a material with good electromagnetic microwave absorption. X-ray photoelectron spectra (XPS) analyses show that more Mn2+ and Zn2+ moved to the surface of particles to form non-stoichiometric (Mn, Zn)Fe2O4 ferrite under annealing with a partial H2, improving the electromagnetic impedance matching. Regarding the original precursor, the lowest reflection loss is about −2.9 dB at 6.3 GHz for a 5 mm thick absorber. After vacuum annealing, the lowest reflection loss is around −34.8 dB at 5.9 GHz for 4 mm thick absorber. The lowest reflection loss of −47.6 dB was obtained at 13.2 GHz with a 1.85 mm thick absorber after annealing under a partial H2. This work proposes a simple way to make a good electromagnetic microwave absorption material starting from the pre-sintered precursor of Mn-Zn ferrites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 381, 1 May 2015, Pages 377-381
نویسندگان
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