UPM Institutional Repository

Annealing study of α-Fe2O3 nanoparticles steel-waste based: microstructure and magnetic behavior


Azis, Raba’ah Syahidah and Zakaria, Azmi and Hassan, Jumiah and Ying, Yuet Lee and Daud, Noruzaman and Mohd Shahrani, Nuraine Mariana and Sulaiman, Sakinah and Che Muda, Nor Nadhirah and Nazlan, Rodziah (2016) Annealing study of α-Fe2O3 nanoparticles steel-waste based: microstructure and magnetic behavior. Solid State Science and Technology, 24 (2). pp. 280-288. ISSN 0128-7389


The interest of this paper is to show the influence of annealing process on magnetic properties and microstructure of -Fe2O3 derived from steel waste product (mill scales). The mill scales flakes were wet ball milling for several hours to form a fine powder. The mill scales powder was purified by using magnetic separation to isolate the magnetic and non magnetic particles. The method was continue for Curie temperature separation technique. The purified powder was annealed at 400/450/500 and 550 °C at 6 oC/mins to form hematite, -Fe2O3. The annealed powders were milled for several hours by using mechanical alloying. Annealing at varied temperatures produced α-Fe2O3 nanopowders with average crystallite size 18.1 nm to 28.6 nm. Phase transformation occurred directly by annealing in air, conversion of FeO and Fe3O4 phase to form α-Fe2O3. The correlation between the magnetic properties and microstructure, of the sintered powders at 1200 oC enables to obtain microphase of α-Fe2O3 and Fe3O4 with different particle size and magnetic properties. The resultant α-Fe2O3 nanopowders are ferromagnetic with moderate coercivities.

Download File

Text (Abstract)
Annealing study of α-Fe2O3 nanoparticles steel-waste based.pdf

Download (189kB) | Preview
Official URL or Download Paper: http://journal.masshp.net

Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Institute of Advanced Technology
Publisher: Malaysian Solid State Science and Technology Society
Keywords: Fe2O3; Steel waste; Particle size; Magnetic properties; Mechanical alloying
Depositing User: Mohd Hafiz Che Mahasan
Date Deposited: 13 Jul 2018 08:55
Last Modified: 13 Jul 2018 08:55
URI: http://psasir.upm.edu.my/id/eprint/55067
Statistic Details: View Download Statistic

Actions (login required)

View Item View Item