Attainment Of Desired Magnetic Properties Of Mg-Zn Ferrite By Controlling The Composition And Microstucture

Tan, Thian Khoon (2000) Attainment Of Desired Magnetic Properties Of Mg-Zn Ferrite By Controlling The Composition And Microstucture. Masters thesis, Universiti Pertanian Malaysia.

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Abstract

This research work was conducted to investigate and understand better the characteristics of magnesium based ferrites. Magnesium-based ferrites were chosen due to one of their vital characteristics, that is high electrical resistivity, which can make them better materials at higher operating frequencies. Besides, they have a lower production cost and no environmental effect. Therefore, perhaps, they can be a better substitute to the existing technological ferrites and consequently replacing them. In order to achieve these goals, a wide-scope experimental investigation was conducted . The samples were prepared by the oxide ceramic processing method, involving dry mixing and solid state reactions. The experimental investigation covered the effects of compositional variations in magnesium-based ferrites with iron deficiency, excess zinc, iron deficiency with excess zinc, magnesium-zinc ion exchange and magnesium-iron ion exchange. Additional experimental work was also carried out to study the effects, on microstructure, of the grinding time, pre-sintering temperature, sintering temperature and sintering time. It was found that, in general, iron deficiency and excess zinc was beneficial to obtaining good magnetic properties. For the magnesium-zinc and magnesium-iron ion exchange, there existed particular compositions which yielded optimum magnetic properties.

Item Type:Thesis (Masters)
Subject:Ferrites (Magnetic materials) - Magnetic properties
Subject:Magnesium - Composition - Microstructure
Chairman Supervisor:Associate Professor Dr. Mansor Hashim
Call Number:FSAS 2000 15
Faculty or Institute:Faculty of Environmental Studies
ID Code:11419
Deposited By: Mohd Nezeri Mohamad
Deposited On:15 Jul 2011 02:25
Last Modified:11 May 2012 04:51

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