کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1463074 989642 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Shielding properties of CuNiZn ferrite in the radio frequency range
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Shielding properties of CuNiZn ferrite in the radio frequency range
چکیده انگلیسی

Shielding properties of copper-doped NiZn ferrites in the frequency range 1 MHz–1.8 GHz, were explored. Samples of composition CuxNi0.4−xZn0.6Fe2O4 with x=0.0, 0.1, 0.2, 0.3 and 0.4, were prepared by the ceramic method. Powders and pellets were sintered at 1100 °C for 2 h. The effect of compositional variation on structural, dielectric and magnetic properties was investigated in order to relate them with the attenuation behavior. X-ray diffraction measurements confirmed the formation of a spinel structure at the selected sintering temperature. The addition of copper promotes grain growth, increases the samples density and modifies saturation magnetization, permeability and permittivity in the explored frequency range. As the reflection loss absolute values (|RL|) for all the samples are above 35 dB, they can all be considered as shielding materials. The optimum attenuation was observed for x=0.2, reaching a maximum |RL| of almost 60 dB at 10 MHz with an attenuation bandwidth of at least 3 MHz.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 39, Issue 5, July 2013, Pages 4777–4782
نویسندگان
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