Document Details

Document Type : Thesis 
Document Title :
Synthesis, Characterization and Magnetic Properties of Nano-crystalline Ferrites Prepared From Industrial Wastes
تحضير و توصيف و دراسة الخواص المغناطيسية لفريتات متناهية الصغر و المحضرة من المخلفات الصناعية
 
Subject : Chemistry department 
Document Language : Arabic 
Abstract : Manganese-zinc ferrites represent important class of ferrimagnetic ceramic materials have wide applications, like cores for inductors, transformers, recording heads and in switch mode power supplies. Iron, manganese and zinc are not only the main components of waste Zn–C dry batteries, but they are also the main components of Mn–Zn soft magnetic ferrite. Exploring a valuable and environment friendly technology to reuse and recycle these wastes efficiently not only effectively converts spent batteries into secondary resource, but also reduces pollution caused by abandoning the batteries In the present study, spent Zn-C dry batteries will be used as a source of Zinc, manganese and iron for preparing manganese-zinc ferrites of important applications. The batteries contents were leached with nitric acid and the chemical composition was estimated using atomic absorption spectroscopy technique then, Stoichiometric amounts of the respective metal nitrates were used to adjust the proper compositions to reach Mn1-xZnxFe2O4 (with x = 0.2 - 0.8). Four different methods were used to prepare the entire ferrites; citrate sol-gel method, urea auto-combustion method, gelatin method and egg-white method. Thermal analysis measurements (DTA-TG-DSC) were carried out on the as-prepared precursors to characterize the thermal decomposition reaction. X-ray diffraction of the as-prepared precursors showed single-phase cubic nano-crystalline ferrites. For different compositions, the lattice parameter, X-ray density and size were estimated and discussed. Fourier transform infrared spectroscopy (FT-IR) exhibited the characteristic absorption bands of ferrites and used in cooperation with XRD to estimate the proper cation distribution of the systems. Transmission electron microscopy (TEM) was used to describe the morphology of the prepared ferrites and to estimate their sizes. The magnetic properties of the prepared ferrites using different methods were measured using vibrating sample magnetometer technique and the different magnetic parameters were calculated and discussed. The effect of zinc substitution on the structural and magnetic properties for ferrites prepared using different methods was also estimated and discussed. 
Supervisor : Dr. Mohammed.A. Gabal 
Thesis Type : Master Thesis 
Publishing Year : 1433 AH
2012 AD 
Co-Supervisor : Dr. Yasser. M. Al Angari 
Added Date : Monday, December 31, 2012 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
رشا شلوة اللهيبيAl-luhaibi, Rasha ShlowahResearcherMaster 

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