We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Synthesis of CoFeO powder via PVA assisted sol-gel process.
- Authors
Sivakumar, M.; Kanagesan, S.; Suresh Babu, R.; Jesurani, S.; Velmurugan, R.; Thirupathi, C.; Kalaivani, T.
- Abstract
CoFeO ferrites were synthesized by sol-gel method, having metal nitrates as precursors and PVA as surfactant, followed by a heat treatment at 960 °C for 2 h. The ultrafine ferrite powders obtained have been characterized by X-ray diffraction, thermal gravimetry, differential scanning calorimetry and room temperature magnetic measurement studies. The morphology of the powder was identified by high resolution-scanning electron microscopy. X-ray diffraction results indicate that the resultant CoFeO crystallites consist of spinel phase. Significant differences in magnetic properties of CoFeO samples synthesized with various concentrations of PVA were observed. The magnetisation measurements show that when the PVA concentration increased, coercivity initially decreased and then increased where as retentivity and magnetisation decreased. The optimum concentration of PVA for the synthesis of CoFeO ferrites is obtained from this investigation. Obviously this material can be used as an efficient candidate for practical recording purpose.
- Subjects
FERRITES; POLYVINYL alcohol; SOL-gel processes; CHEMICAL synthesis; COBALT compounds; X-ray diffraction; MAGNETIC properties of metals; DIFFERENTIAL scanning calorimetry
- Publication
Journal of Materials Science: Materials in Electronics, 2012, Vol 23, Issue 5, p1045
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-011-0545-0