NDLI: Microwave Assisted Combustion Synthesis and Characterization of Nanocrystalline Nickel-doped Cobalt Ferrites

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Microwave Assisted Combustion Synthesis and Characterization of Nanocrystalline Nickel-doped Cobalt Ferrites

Content Provider	Semantic Scholar
Author	Freitasa, Marcio Roberto De Gouveiaa, Guilherme Lisboa De Costab, Leonardo José Dalla Adilson Oliveirab, Jesus Aparecido De Kiminamib, Ruth Herta Goldschmidt Aliaga
Copyright Year	2017
Abstract	Nanoparticles nickel-doped cobalt ferrites [NixCo1-xFe2O4 (x = 0.0, 0.25, 0.50, 0.75 and 1.0 of Ni2+)] were prepared by the microwave combustion synthesis, using a stoichiometric mixture of metal nitrates and urea as the oxidizer and fuel to drive the reaction. The effect of microwave irradiation on the phase composition was favorable to promote the formation of fluffy foams and nanoparticles sizes. The fast internal heating with microwaves leads to a reduction in synthesis time, to only 2 min. The structural, chemical and magnetic properties of the nickel-doped cobalt ferrites were analyzed by XRD, TEM, SEM and BET. The XRD results confirmed the formation of pure and single-phase spinel structure. The crystallite size of the nanoparticles was in the range of 38 50 nm. SEM images show nanoparticles with spherical shape and homogenous morphology. The TEM analysis shows necked near-spherical particles with an average size of ~30 50 nm, reflecting the highly crystalline nature of these nanoparticles. The magnetic measurements of all the samples were recorded using vibrating sample magnetometer (VSM) at room temperature in 10 kOe. Increasing the nickel content directly affects the structural characteristics of the particles, causing a reduction in the coercive field.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.scielo.br/pdf/mr/v19s1/1516-1439-mr-1980-5373-MR-2016-0077.pdf
Language	English
Access Restriction	Open
Subject Keyword	Cobalt Cobalt:SCnc:Pt:Bld:Qn Crystal Structure Doping (semiconductor) Ferrite (magnet) Foam drug form Guilty Gear Xrd Heating Mathematical morphology Maxima and minima Metal Ceramic Alloys Microwave Nickel:SCnc:Pt:Bld:Qn Nitrates Particle Reduction (complexity) Urea Viable system model magnetometers nickel spinell
Content Type	Text
Resource Type	Article

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