Synthesis of Ni-Zn And Ni-Zn-Cu Ferrite Via Sol-Gel Route and Solid State Reaction
A ferrite is an important class of magnetic materials. At present the major material types for application of spinel soft ferrite are nickel-zinc and manganesezinc ferrites. A majority of these ferrites are synthesised by the classical method which is the conventi onal ceramic process known as so...
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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/7972/1/ITMA_2000_2.pdf |
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| Summary: | A ferrite is an important class of magnetic materials. At present the major
material types for application of spinel soft ferrite are nickel-zinc and manganesezinc
ferrites. A majority of these ferrites are synthesised by the classical method
which is the conventi onal ceramic process known as sol id state reaction (SSR). Most
nonconventional processes for powder preparation are wet methods. Some of these
processes are co-precipitation; organic precursors; co-spray roasting; freeze drying;
sol-gel route (SGR).
prepared by two different processes: the first i s solid state reaction and the other is
sol-gel route. Different starting materials are used and the process of sol-gel
technique is well known. The synthesis of these compounds via sol-gel technique is
carried out. Scanning electron microscope, Infrared spectroscopy and X-ray analyses
of various gel samples with different thermal history helped in identifying the
reaction process and the stages where amorphous-gel-to-crystalline phase transition
occurred.The utilization of sol-gel technique is successful. Comparison of the results for
samples demonstrates that the microstructural, magnetic and electrical properties of
soft ferrites are improved, and some interesting advantages are realized such as low
temperature of preparation, better homogeneity and well-defined polycrystalline
microstructure. In addition, a new important advantage has been found in this
research, which is short processing time of gel preparation. |
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