مرکز مقالات امام موسی کاظم (ع)

دانلود مقاله Structural studies of nanosized nickelدرsubstituted cobalt ferrite, synthesized by sol


برای دریافت اینجا کلیک کنید

دانلود مقاله Structural studies of nanosized nickelدرsubstituted cobalt ferrite, synthesized by solدرgel method با word دارای 4 صفحه می باشد و دارای تنظیمات در microsoft word می باشد و آماده پرینت یا چاپ است

فایل ورد دانلود مقاله Structural studies of nanosized nickelدرsubstituted cobalt ferrite, synthesized by solدرgel method با word کاملا فرمت بندی و تنظیم شده در استاندارد دانشگاه و مراکز دولتی می باشد.

این پروژه توسط مرکز مرکز پروژه های دانشجویی آماده و تنظیم شده است

توجه : در صورت  مشاهده  بهم ريختگي احتمالي در متون زير ،دليل ان کپي کردن اين مطالب از داخل فایل ورد مي باشد و در فايل اصلي دانلود مقاله Structural studies of nanosized nickelدرsubstituted cobalt ferrite, synthesized by solدرgel method با word،به هيچ وجه بهم ريختگي وجود ندارد


بخشی از متن دانلود مقاله Structural studies of nanosized nickelدرsubstituted cobalt ferrite, synthesized by solدرgel method با word :

سال انتشار: 1391
محل انتشار: سومین کنفرانس بین المللی عملیات حرارتی مواد
تعداد صفحات: 4
چکیده:

In this study Ni substituted cobalt ferrite nanopowders Co1-xNixFe2O4 (x=0.1, 0.3, 0.5, 0.7 and 0.9) were prepared by sol-gel method. Phase identification of the samples was performed by X-ray diffraction (XRD) and mean crystallite sizes of 30 nm were calculated by Scherrers formula. The results show that a minimum calcining temperature of 500 C is required to obtain a single phase spinel structure for all samples. It was observed that the lattice parameter of the samples decreases from 8.35 to 8.29 as Ni decreases. Magnetic measurements were carried out on cold pressed samples and the results show that as the value of x increases saturation magnetization decreases. Curie temperatures of the samples were measured and the results show that by increasing the x values the Curie temperatures of the samples increase. This increase was explained based on the change of superexchange interactions between different magnetic ions. Also the coercive forces of the samples were decreased by increasing x values which was explained based on the changes of anisotropy energy


برای دریافت اینجا کلیک کنید

[ بازدید : 13 ]

[ چهارشنبه 20 بهمن 1395 ] 6:23 ] [ علی ]

[ ]

سئو سایت ساخت وبلاگ
خشکشویی آنلاین بستن تبلیغات [x]