کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1797631 1524800 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of Ni ferrites powders prepared by plasma arc discharge process
ترجمه فارسی عنوان
خواص پودر فریت از Ni تهیه شده توسط پلاسما فرآیند تخلیه قوس الکتریکی
کلمات کلیدی
فریت از Ni؛ پلاسما تخلیه قوس الکتریکی؛ مواد نانو؛اشباع مغناطیس
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
چکیده انگلیسی


• Nanocrystalline Ni ferrite powders are prepared by plasma arc discharge process.
• The mean particle size of the as-synthesized ceramic powders is about 100 nm.
• The highest saturation magnetization is observed as zinc powders removed completely from the initial mixture.

The aim of this work was to synthesize a single-phase spinel structure from a mixture of zinc, iron and nickel powders by plasma arc discharge method. A mixture of zinc, iron and nickel powders with the appropriate molar ratio was prepared and formed into a cylindrical shape. The synthesis process was performed in air, oxygen and argon atmospheres with the applied arc current of 400 A and pressure of 1 atm. After establishing an arc between the electrodes, the produced powders were collected and their structure and magnetic properties were examined by XRD and VSM, respectively.ZnO as an impurity was appeared in the as-produced powders owing to the high reactivity of zinc atoms, preventing the formation of Ni–Zn ferrite. A pure spinel structure with the highest saturation magnetization (43.8 emu/g) was observed as zinc powders removed completely from the initial mixture. Morphological evaluations using field emission scanning electron microscopy showed that the mean size of fabricated nanoparticles was in the range 100–200 nm and was dependent on the production conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 421, 1 January 2017, Pages 44–51
نویسندگان
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