Attainment Of Desired Magnetic Properties Of Mg-Zn Ferrite By Controlling The Composition And Microstucture
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 freq...
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| Format: | Thesis |
| Language: | English English |
| Published: |
2000
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/11419/ http://psasir.upm.edu.my/id/eprint/11419/1/FSAS_2000_15%20%28A%29.pdf |
| Summary: | 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. |
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