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X-ray diffraction studies on crystallite size evolution of CoFe2O4 nanoparticles prepared using mechanical alloying and sintering


Citation

Waje, Samaila Bawa and Hashim, Mansor and Wan Yusoff, Wan Mohamad Daud and Abbas, Zulkifly (2010) X-ray diffraction studies on crystallite size evolution of CoFe2O4 nanoparticles prepared using mechanical alloying and sintering. Applied Surface Science, 256 (10). pp. 3122-3127. ISSN 0169-4332; ESSN: 1873-5584

Abstract / Synopsis

Nanosized cobalt ferrite spinel particles have been prepared by using mechanically alloyed nanoparticles. The effects of various preparation parameters on the crystallite size of cobalt ferrite which includes milling time; ball-to powder weight ratio (BPR) and sintering temperature, were studied using X-ray diffractometer (XRD). Scherrer's equation was used to study the crystallite size evolution of the as-prepared materials. The results of the as-milled sample revealed that both milling time and BPR plays a role in determining the crystallite size of the milled powder. However, where sintering is involved, the sintering temperature results in grain growth, and thus plays a dominant role in determining the final crystallite size of the samples sintered at higher temperature (above 900 °C). From the vibrating-sample magnetometer (VSM) measurement it was observed that the coercivity of the as-milled samples without sintering is almost negligible, which is a type characteristic of superparamagnetic material. However, for the sintered samples, the saturation increases while coercivity decreases with increases sintering temperature.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Institute of Advanced Technology
DOI Number: https://doi.org/10.1016/j.apsusc.2009.11.084
Publisher: Elsevier
Keywords: Crystallite size; Sintering temperature; X-ray diffraction; Nanoparticles
Depositing User: Najwani Amir Sariffudin
Date Deposited: 13 Dec 2011 09:37
Last Modified: 10 May 2016 08:57
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.apsusc.2009.11.084
URI: http://psasir.upm.edu.my/id/eprint/17667
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