پديد آورنده :
محسني، حسين
عنوان :
ارزيابي ساختار و رفتار مغناطيسي فريت نانو ذره نيكل - مس - روي توليدي به روش سنتز احتراقي گليسين - نيترات
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
چهارده، 112ص.: مصور، جدول، نمودار
يادداشت :
ص.ع. به فارسي و انگليسي
استاد راهنما :
مرتضي شمعانيان، محمدحسين فتحي
استاد مشاور :
خليل اله قيصري
توصيفگر ها :
فرايند سنتز احتراقي گلايسين - نيترات , فريت نيكل - مس-روي , نانو ذرات , خواص مغناطيسي
تاريخ نمايه سازي :
23/3/94
استاد داور :
احمد منشي، مهدي رنجبر
تاريخ ورود اطلاعات :
1396/10/02
چكيده انگليسي :
Evaluation of Structure and Magnetic Properties of Ni Cu Zn Nanostructured Ferrite Prepared by Glycine Nitrate Auto Combustion Synthesis Hossein Mohseni h mohseni@ma iut ac ir 17 January 2015 Department of Material Science and Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi M Shamanian Professor Supervisor M Shamanian@cc iut ac ir M H Fathi Professor Supervisor Fathi@cc iut ac ir Abstract In this study Ni Cu Zn ferrites with the chemical composition of Ni0 5CuxZn1 xFe2O4 where x 0 0 1 0 2 0 3 0 4 0 5 were synthesized by glycine nitrate process using glycine as a fuel and nitrate as an oxidizer Thermo gravity analysis TGA X ray diffraction XRD scanning electron microscope SEM vibrating sample magnetometer VSM LCR Meter methods were employed for characterization of thermal analysis microstructure analysis magnetic electromagnetic and dielectric properties respectively Qualitative and quantitative phase analysis structural parameter beside cation distribution were done by Panalytical X pert Highscore Plus Crystal Impact Match Material Studio and MATLAB as well as OriginPro Softwares respectively Due to heat treatment non Spinel phases were disappeared To find out the optimize temperature Ni0 5Zn0 5Fe2O4 powders were calcined at different temperatures The as received powders calcined at 1000 C for 2 hours and cooled down in furnace The calcined powders were characterized by X ray diffraction technique It was revealed that the combustion reaction was extremely exothermic and occurred between 220 to 227 C Characteristics of as synthesized powders by X ray diffraction technique gave evidence to the presence of Zinc Oxide Iron Oxide Ni and other impurity along with spinel structure The least impurity level belonged to Ni0 5Cu0 2Zn0 3Fe2O4 More specifically it consisted 12 1 wt Ni clusters containing numerous pores associated with large amount of gases released during the combustion synthesis In the meantime clusters were 20 to 40 nm large X ray diffraction patterns revealed that Ni Cu Zn ferrite powders with spinel structure were been successfully formed in each specimen Saturation magnetization and permeability increased by the increasing of copper content up to x 0 1 and then decreased On the other hand coercivity constantly increased as Cu content increased Dielectric pattern was indicative of reduction in dielectric constant as well The single semi circle in Nyquist curve was appeared as a result of grain boundary effect Contrary to this semi circle for the effect of grain was not observed due to the difference between dielectric behavior of grain and grain boundary Keywords Glycine nitrate auto combustion process Ni Cu Zn ferrite Nanocrystalline magnetic properties
استاد راهنما :
مرتضي شمعانيان، محمدحسين فتحي
استاد مشاور :
خليل اله قيصري
استاد داور :
احمد منشي، مهدي رنجبر
