کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10632159 | 992391 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sol-gel auto-combustion synthesis of Ni0.5Zn0.5Fe2O4/(SiO2)x (x = 10, 20, 30 wt.%) nanocomposites and their characterizations
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A nitrate-citrate-silica gel was prepared from metallic nitrates, citric acid and tetraethoxysilane (TEOS) by sol-gel process, and it was further used to synthesize Ni0.5Zn0.5Fe2O4/SiO2 nanocomposites by auto-combustion. The obtained Ni0.5Zn0.5Fe2O4/(SiO2)x (x = 10, 20, 30 wt.%) samples were characterized by IR, 29Si CP/MAS NMR, XRD, TEM, EPR and impedance analyzer measurements. Particle size of these composites was calculated from Scherrer's formula, and that decreased with increasing SiO2 content. The content of TEOS in the starting solution affects the interaction between NiZn ferrite and silica, and then determines the particle size, dielectric properties and the EPR properties (ÎHPP, g factor, NS and T2) of the as-synthesized powder.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 40, Issue 2, 15 February 2005, Pages 239-248
Journal: Materials Research Bulletin - Volume 40, Issue 2, 15 February 2005, Pages 239-248
نویسندگان
K.H. Wu, W.C. Huang, C.C. Yang, J.S. Hsu,