Combustion synthesis of nickel ferrite powders: Effect of NaClO4 content on their characteristics and magnetic properties

2019 ◽  
Vol 19 (4) ◽  
pp. 548-555 ◽  
Author(s):  
Prakasit Intaphong ◽  
Nutwara Radklaochotsatain ◽  
Wararat Somraksa ◽  
Suppanat Musigawon ◽  
Naruepon Kongthong ◽  
...  
2012 ◽  
Vol 51 (1-2) ◽  
pp. 99-104
Author(s):  
N. Zaporina ◽  
J. Grabis ◽  
M. Maiorov ◽  
A. Krumina ◽  
G. Heidemane ◽  
...  

Nanodisperse Nickel Ferrite: Methods of Production, Structure and Magnetic Properties The nickel ferrite nanoparticles were prepared using combustion synthesis and plasma chemical synthesis based on evaporation of coarse-grained oxide powders in an inductively coupled air plasma, and their characteristics were compared. The crystallite size of nanoparticles produ-ced by combustion synthesis and plasma synthesis were of 29 and 45 nm respectively. The saturation magnetization of the plasma-prepared samples (43.5 emu/g) and coercivity (74 Oe) exceed values reported in literature for NiFe2O4 powders and could be explained by wide particle size distri-bution. The magnetic characteristics of the chemically prepared samples with more narrow particle size distribution were close to the respective literature data.


Author(s):  
Ana Cristina F.M. Costa ◽  
L. Gama ◽  
M.R. Morelli ◽  
Ruth H.G.A. Kiminami

2016 ◽  
Vol 120 (6) ◽  
pp. 3492-3500 ◽  
Author(s):  
Xabier Lasheras ◽  
Maite Insausti ◽  
Izaskun Gil de Muro ◽  
Eneko Garaio ◽  
Fernando Plazaola ◽  
...  

2005 ◽  
Vol 498-499 ◽  
pp. 618-623 ◽  
Author(s):  
Ana Cristina Figueiredo de Melo Costa ◽  
Lucianna Gama ◽  
M.R. Morelli ◽  
Ruth Herta Goldsmith Aliaga Kiminami

Nanosized spinel nickel ferrite particles have attracted considerable attention and efforts continue to investigate them for their technological importance to the microwave industries, high speed digital tap or disk recording, repulsive suspension for use in levitated railway systems, ferrofluids, catalysis and magnetic refrigeration systems. Nanosize nickel ferrite powders (NiFe2O4) have been prepared by combustion reaction using nitrates and urea as fuel. The resulting powders were characterized by X-ray diffraction (XRD), BET, and transmission electron microscopy (TEM). The results showed nanosize nickel ferrite powders with high specific surface area (55.21 m2/g). The powders showed extensive XRD line broadening and the crystallite size calculated from the XRD line broadening was 18.0 nm. The samples were uniaxially compacted by dry pressing, sintered at 1200°C/2h and characterized by bulk density, SEM and magnetic properties measurements. The samples showed uniform microstructures with grain size of 4.45 μm, maximum flux density of 0.18T, field coercive of the 488 A/m, and hysteresis loss of 47.58 W/kg.


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