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Abedini Khorrami, S., Islampour, R., Bakhtiari, H., Sadr Manuchehri Naeini, Q. (2013). The effect of molar ratio on structural and magnetic properties of BaFe12O19 nanoparticles prepared by sol-gel auto-combustion method. International Journal of Nano Dimension, 3(3), 191-197. doi: 10.7508/ijnd.2012.03.004
S. Abedini Khorrami; R. Islampour; H. Bakhtiari; Q. Sadr Manuchehri Naeini. "The effect of molar ratio on structural and magnetic properties of BaFe12O19 nanoparticles prepared by sol-gel auto-combustion method". International Journal of Nano Dimension, 3, 3, 2013, 191-197. doi: 10.7508/ijnd.2012.03.004
Abedini Khorrami, S., Islampour, R., Bakhtiari, H., Sadr Manuchehri Naeini, Q. (2013). 'The effect of molar ratio on structural and magnetic properties of BaFe12O19 nanoparticles prepared by sol-gel auto-combustion method', International Journal of Nano Dimension, 3(3), pp. 191-197. doi: 10.7508/ijnd.2012.03.004
Abedini Khorrami, S., Islampour, R., Bakhtiari, H., Sadr Manuchehri Naeini, Q. The effect of molar ratio on structural and magnetic properties of BaFe12O19 nanoparticles prepared by sol-gel auto-combustion method. International Journal of Nano Dimension, 2013; 3(3): 191-197. doi: 10.7508/ijnd.2012.03.004

The effect of molar ratio on structural and magnetic properties of BaFe12O19 nanoparticles prepared by sol-gel auto-combustion method

Article 5, Volume 3, Issue 3, Winter 2013, Page 191-197  XML PDF (745.78 K)
Document Type: Reasearch Paper
DOI: 10.7508/ijnd.2012.03.004
Authors
S. Abedini Khorrami email ; R. Islampour; H. Bakhtiari; Q. Sadr Manuchehri Naeini
Department of Chemistry, Azad University, North Tehran Branch, Tehran, Iran.
Abstract
Nanocrystalline particles of barium hexaferrite has been prepared by the sol–gel auto- combustion method using iron and barium nitrate with a Ba:Fe molar ratio of 1:10. The effect of fuel such as citric acid and aspartic acid was investigated on the structure and magnetic properties of nanoparticles. The results revealed that the formation of barium hexaferritefine particles is influenced by molar ratio of metal nitrates to fuel. The formation of pure crystallized BaFe12O19 nanoparticles occurred when the precursor was heat-treated at 900°C for 2 h. Nanoparticles of barium hexaferrite with average crystalline size between   60-69 nm has been obtained. X-ray diffraction (XRD), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM) were employed to identify the structural phases, surface morphology and magnetic properties of the prepared nanoparticles, respectively.  Magnetic measurements showed that the BaFe12O19 nanoparticles exhibited a great coercive field and high saturation magnetization of up to 5100 Oe and 55 emu g-1, respectively.
Keywords
BaFe12O19; Permanent magnets; Hexagonal ferrites; Sol-Gel auto -combustion method
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