The effects of heat treatment on the synthesis of nickel ferrite (NiFe2O4) nanoparticles using the microwave assisted combustion method
Küçük Resim Yok
Tarih
2015
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
NiFe2O4nanoparticles were synthesized using the microwave assisted combustion method based on metal nitrate salts and urea. To remain of organic matters and to stabilize the particles, samples were thermally treated at various temperatures from 300-800 °C. The prepared samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) thermogravimetric analysis (TGA) and vibrating sample magnetometry (VSM). The heat treated samples show the reflection planes of (111), (220), (222), (311), (400), (422), (511), and (440) which perfectly confirm to a cubic spinel phase of NiFe2O4and no secondary phases were detected in the XRD patterns of the samples. The crystallite sizes calculated using the Debye-Scherrer formula were found to increase with the heat treatment temperature, from about 4 nm at 300 °C-85 nm at 800 °C. EDX results verify that the compositional mass rations were relevant, as expected from the synthesis. The micrographs of SEM and TEM showed that all of the samples have nano-crystalline behavior and particles indication cubic shape. Magnetization measurements were obtained at room temperature by using a VSM, which demonstrated that the all of the samples synthesized with heat treatment exhibited ferromagnetic behaviors. © 2014 Published by Elsevier B.V.
Açıklama
Anahtar Kelimeler
Combustion and magnetization, Heat treatment, Measurement, Microwave, Nickel ferrite, Combustion, Electron microscopy, Energy dispersive spectroscopy, Ferrite, Heat treatment, Magnetization, Measurements, Metal nanoparticles, Microwaves, Nanoparticles, Nickel, Scanning electron microscopy, Thermogravimetric analysis, Transmission electron microscopy, Urea, X ray diffraction, X ray spectroscopy, Effects of heat treatment, Energy dispersive X ray spectroscopy, Ferromagnetic behaviors, Heat treatment temperature, Magnetization measurements, Microwave-assisted combustions, Nickel ferrite, Vibrating sample magnetometry, Synthesis (chemical), Heat treatment, Combustion and magnetization, Heat treatment, Measurement, Microwave, Nickel ferrite, Combustion, Electron microscopy, Energy dispersive spectroscopy, Ferrite, Heat treatment, Magnetization, Measurements, Metal nanoparticles, Microwaves, Nanoparticles, Nickel, Scanning electron microscopy, Thermogravimetric analysis, Transmission electron microscopy, Urea, X ray diffraction, X ray spectroscopy, Effects of heat treatment, Energy dispersive X ray spectroscopy, Ferromagnetic behaviors, Heat treatment temperature, Magnetization measurements, Microwave-assisted combustions, Nickel ferrite, Vibrating sample magnetometry, Synthesis (chemical), Heat treatment
Kaynak
Journal of Magnetism and Magnetic Materials
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
374
