کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7887471 1509792 2018 27 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microwave absorption properties of CoGd substituted ZnFe2O4 ferrites synthesized by co-precipitation technique
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Microwave absorption properties of CoGd substituted ZnFe2O4 ferrites synthesized by co-precipitation technique
چکیده انگلیسی
A series of co-precipitated Zn1−xCoxGdyFe2−yO4 spinel ferrites (x = 0.0-0.5, y = 0.00-0.10) sintered at 1000 °C were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), vibrating sample magnetometery (VSM) and microwave cavity perturbation (MCP). XRD patterns and FTIR spectra reveal formation of the spinel phase along with few traces of GdFeO3 second phase. The lattice constant decreases with an increasing amount of CoGd ions due to the segregation of Gd3+on the grain boundaries and due to replacement of lager Zn2+ ions with smaller Co2+ ions. SEM shows grain size to decrease with the increase of CoGd contents due to grain growth inhibition by the second phase. VSM results show remanence and saturation magnetization to exhibit an increasing trend due to Co substitution on octahedral sites and presence of a second phase. The coercivity increases with the increase of CoGd contents due to anisotropic nature of Co. MCP shows the complex magnetic permeability to increase with CoGd concentration while the complex permittivity decreases.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 6, 15 April 2018, Pages 5909-5914
نویسندگان
, , , , , , , ,