PREPARATION AND CHARACTERIZATION . ' OF SOME METAL FERRITES BY DIFFERENT METHODS
INASS MOUSTAFH;£\ ABDEL FATTAH;
Abstract
This thesis deals with the preparation, characterization and study of the properties of Nickel ferrites, Cobalt fer rites and mixed ferrite
These ferrites were prepared by two different techniques:
The conventional ceramic process and a wet precipitation technique using precursor salts. Characterization of the formed ferrites was made using XRD and thermal analysis.
. The powders prepared were then dry pressed under different forming pressures (35,56 and 70MPa) and sintered at 1300oC until their bulk density stabilizes.
Magnetic permeability was then measured for all samples. Also, the following dielectric properties: A.C. resistivity, dielectric constant, dielectric loss and loss tangent were determined for the densest samples as function of frequency.
It was found that the samples prepared by the wet precipitation method were superior in all their properties to those prepared by the dry technique. The interpretation was given. Also, the mechanisms of the initial stage of sintering were diclosed in all cases.
These ferrites were prepared by two different techniques:
The conventional ceramic process and a wet precipitation technique using precursor salts. Characterization of the formed ferrites was made using XRD and thermal analysis.
. The powders prepared were then dry pressed under different forming pressures (35,56 and 70MPa) and sintered at 1300oC until their bulk density stabilizes.
Magnetic permeability was then measured for all samples. Also, the following dielectric properties: A.C. resistivity, dielectric constant, dielectric loss and loss tangent were determined for the densest samples as function of frequency.
It was found that the samples prepared by the wet precipitation method were superior in all their properties to those prepared by the dry technique. The interpretation was given. Also, the mechanisms of the initial stage of sintering were diclosed in all cases.
Other data
| Title | PREPARATION AND CHARACTERIZATION . ' OF SOME METAL FERRITES BY DIFFERENT METHODS | Other Titles | تحضير وتعيين خواص بعض الحديديت الفلزية بطرق مختلفة | Authors | INASS MOUSTAFH;£\ ABDEL FATTAH | Issue Date | 1999 |
Attached Files
| File | Size | Format | |
|---|---|---|---|
| ايناس مصطفى.pdf | 318.33 kB | Adobe PDF | View/Open |
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