کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1662539 1517706 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Highly stable alumina-coated iron nanocomposites synthesized by wet chemistry method
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Highly stable alumina-coated iron nanocomposites synthesized by wet chemistry method
چکیده انگلیسی

Highly stable Fe/Al2O3 nanocomposite, which was Fe nanoparticles coated with a thin shell of alumina, has been successfully fabricated by a simple wet chemistry procedure. The formation of these powders was confirmed by X-ray power diffraction (XRD) and transmission electron microscopy (TEM). The effect of the alumina shell on the properties of the nanocomposite was studied. The magnatizations of Fe cores in the Fe/Al2O3 nanocomposites with 20% and 30% Al/Fe molar ratio were as high as 210 emu/g, and almost did not change after being exposed in air at least 60 days. It indicates that these alumina-coated Fe nanocomposites were very stable. The complex permeability study of the as-prepared samples shows that Al2O3 shell could improve the soft magnetic property, especially in the high-frequency range. The real part μ of the permeability of the sample with Al molar content of 20% (Al/Fe) was as high as 13 and independent of frequency up to at least 1 GHz.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 200, Issues 16–17, 27 April 2006, Pages 5170–5174
نویسندگان
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