Microwave sintering of nickel ferrite nanoparticles processed via sol-gel method

M. Penchal Reddy, W. Madhuri, K. Sadhana, I. G. Kim, K. N. Hui, K. S. Hui, K. V. Siva Kumar, R. Ramakrishna Reddy

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29 Citations (Scopus)


Magnetic nickel ferrite (NiFe2O4) was prepared by sol-gel process and calcined in the 2.45 GHz singlemode microwave furnace to synthesize nickel nanopowder. The sol-gel method was used for the processing of the NiFe2O4 powder because of its potential for making fine, pure and homogeneous powders. Sol-gel is a chemical method that has the possibility of synthesizing a reproducible material. Microwave energy is used for the calcining of this powder and the sintering of the NiFe2O 4 samples. Its use for calcination has the advantage of reducing the total processing time and the soak temperature. In addition to the above combination of sol-gel and microwave processing yields to nanoscale particles and a more uniform distribution of their sizes. X-ray diffraction, energy dispersive X-ray spectroscopy, transmission electron microscopy and vibrating sample magnetometer were carried out to investigate structural, elemental, morphological and magnetic aspects of NiFe2O4. The results showed that the mean size and the saturation magnetization of the NiFe 2O4 nanoparticles are about 30 nm and 55.27 emu/g, respectively. This method could be used as an alternative to other chemical methods in order to obtain NiFe2O4 nanoparticles.

Original languageEnglish
Pages (from-to)400-404
Number of pages5
JournalJournal of Sol-Gel Science and Technology
Issue number3
Early online date7 Feb 2014
Publication statusPublished - Jun 2014


  • Ferrite
  • Microwave sintering
  • Nano particles
  • Saturation magnetization
  • Sol-gel synthesis
  • TEM

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