Current study results on Nanocrystals have been published. According to news reporting from Cluj Napoca, Romania, by NewsRx journalists, research stated, „Nanocomposite powder and compacts of NiFe2O4/Ni3Fe type were synthesized using mechanical milling and spark plasma sintering (SPS) techniques. The samples have been investigated by X-ray diffraction (XRD), laser particles size analysis, differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDX).”
The news correspondents obtained a quote from the research from Babes-Bolyai University, „The nanocomposite powder was obtained by mechanical milling in a high planetary ball mill of nanocrystalline NiFe2O4 and nanocrystalline Ni3Fe powders. The nanocomposite powder consists from Ni3Fe particles covered at the surface with a layer of NiFe2O4 fine particles and NiFe2O4 particles. The nanocomposite particles have the median diameter d(50) of 1.6 mu m. The sintering in 400-600 degrees C temperature range preserve the nanocomposite phases but lead to a high porosity. The nanocomposite compacts consist in Ni3Fe clusters surrounded by NiFe2O4. A sintering temperature of 800 degrees C leads to a good density for the nanocomposite compacts and to the new phase formation. The new phase is a wustite type (Fe1-xNixO) and is formed at the metal/ceramic interface. A change in the Ni/Fe ratio, in the spinel structure, was evidenced during sintering.”
According to the news reporters, the research concluded: „Sintering at a temperature of 800 degrees C, leads to the formation of a mixed iron-nickel ferrite with a very small amount of nickel, Ni1-xFexFe2O4.”
For more information on this research see: Synthesis and characterization of the NiFe2O4/Ni3Fe nanocomposite powder and compacts obtained by mechanical milling and spark plasma sintering. Applied Surface Science, 2013;285():2-9. Applied Surface Science can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier – www.elsevier.com; Applied Surface Science – www.elsevier.com/wps/product/cws_home/505669)
