Preparation and Characterization of Barium and Strontium Hexaferrite Employing Recycled Millscale

In this project work, permanent magnet barium/ strontium hexaferrite materials was prepared from millscale, using hematite derived from millscale by the Curie Temperature Separation Technique (CTST). The excellent CTST isolation and purification of wustite,FeO contained in the millscale and conve...

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Main Author:	Azis, Raba'ah Syahidah
Format:	Thesis
Language:	English English
Published:	2003
Subjects:	Barium Strontium Ferrites (Magnetic materials)
Online Access:	http://psasir.upm.edu.my/id/eprint/110/1/FSAS_2003_53a.pdf
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spelling	my-upm-ir.1102013-05-27T06:45:37Z Preparation and Characterization of Barium and Strontium Hexaferrite Employing Recycled Millscale 2003-05 Azis, Raba'ah Syahidah In this project work, permanent magnet barium/ strontium hexaferrite materials was prepared from millscale, using hematite derived from millscale by the Curie Temperature Separation Technique (CTST). The excellent CTST isolation and purification of wustite,FeO contained in the millscale and converted to hematite,Fe2O3, was confirmed by X-Ray Diffraction (XRD) pattern analysis and element analysis by Electron Dispersive X-Ray (EDAX). The sample was prepared by recycling the waste product from Malaysian steel-making factories. Using a Curie temperature separation technique, the wustite,FeO contained in the millscale was separated by this new technique using deionized water at 90oC/100oC in the presence of 1T external magnetic field. The wustite iv was then oxidized in air at 400oC/500oC/600oC for 10 hours. An XRD phase analysis showed that a very high percentage of Fe2O3 was present in the final powder preparation. A conventional ceramic powder processing method was then carried out to prepare hexagonal BaFe12O19 and SrFe12O19 pallet shaped samples. Analysis of samples was done on density, resistivity, X-Ray Diffraction (XRD), Particle Size Analysis (PSD), Electron Dispersive X-Ray (EDAX), Scanning Electron Micrsocopy (SEM), grain size, saturation magnetization, coercive force and remanence. The effect of prolonged milling time shows a positive tendency for the formation of needle shape microstructure (0.3μm-1μm) of barium hexaferrite. The magnetic properties were measured using an Approximation Method (APM) theory. The 3.33 kG high remanence , 0.74 kG saturation magnetisation and 2.857 kOe coercive force of the sample derived from millscale shows that recycling a waste steel-making product has a high potential to produce a low cost ferrite in the future. Barium Strontium Ferrites (Magnetic materials) 2003-05 Thesis http://psasir.upm.edu.my/id/eprint/110/ http://psasir.upm.edu.my/id/eprint/110/1/FSAS_2003_53a.pdf application/pdf en public masters Universiti Putra Malaysia Barium Strontium Ferrites (Magnetic materials) Faculty of Environmental Studies English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Barium Strontium Ferrites (Magnetic materials)
spellingShingle	Barium Strontium Ferrites (Magnetic materials) Azis, Raba'ah Syahidah Preparation and Characterization of Barium and Strontium Hexaferrite Employing Recycled Millscale
description	In this project work, permanent magnet barium/ strontium hexaferrite materials was prepared from millscale, using hematite derived from millscale by the Curie Temperature Separation Technique (CTST). The excellent CTST isolation and purification of wustite,FeO contained in the millscale and converted to hematite,Fe2O3, was confirmed by X-Ray Diffraction (XRD) pattern analysis and element analysis by Electron Dispersive X-Ray (EDAX). The sample was prepared by recycling the waste product from Malaysian steel-making factories. Using a Curie temperature separation technique, the wustite,FeO contained in the millscale was separated by this new technique using deionized water at 90oC/100oC in the presence of 1T external magnetic field. The wustite iv was then oxidized in air at 400oC/500oC/600oC for 10 hours. An XRD phase analysis showed that a very high percentage of Fe2O3 was present in the final powder preparation. A conventional ceramic powder processing method was then carried out to prepare hexagonal BaFe12O19 and SrFe12O19 pallet shaped samples. Analysis of samples was done on density, resistivity, X-Ray Diffraction (XRD), Particle Size Analysis (PSD), Electron Dispersive X-Ray (EDAX), Scanning Electron Micrsocopy (SEM), grain size, saturation magnetization, coercive force and remanence. The effect of prolonged milling time shows a positive tendency for the formation of needle shape microstructure (0.3μm-1μm) of barium hexaferrite. The magnetic properties were measured using an Approximation Method (APM) theory. The 3.33 kG high remanence , 0.74 kG saturation magnetisation and 2.857 kOe coercive force of the sample derived from millscale shows that recycling a waste steel-making product has a high potential to produce a low cost ferrite in the future.
format	Thesis
qualification_level	Master's degree
author	Azis, Raba'ah Syahidah
author_facet	Azis, Raba'ah Syahidah
author_sort	Azis, Raba'ah Syahidah
title	Preparation and Characterization of Barium and Strontium Hexaferrite Employing Recycled Millscale
title_short	Preparation and Characterization of Barium and Strontium Hexaferrite Employing Recycled Millscale
title_full	Preparation and Characterization of Barium and Strontium Hexaferrite Employing Recycled Millscale
title_fullStr	Preparation and Characterization of Barium and Strontium Hexaferrite Employing Recycled Millscale
title_full_unstemmed	Preparation and Characterization of Barium and Strontium Hexaferrite Employing Recycled Millscale
title_sort	preparation and characterization of barium and strontium hexaferrite employing recycled millscale
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Environmental Studies
publishDate	2003
url	http://psasir.upm.edu.my/id/eprint/110/1/FSAS_2003_53a.pdf
_version_	1747810139782512640

Preparation and Characterization of Barium and Strontium Hexaferrite Employing Recycled Millscale

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