Preparation and characterization of nanosized magnesium ferrite powders by a starch-gel process and corresponding ceramics

Abstract

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Preparation of Magnesium, Cobalt and Nickel Ferrite Nanoparticles from Metal Oxides using Deep Eutectic Solvents

“…[30] The bandgap energy E g was determined by finding the intercept of the straight line in the low-energy rise of the plot of [F(R 1 ) hn] 1/2 for the indirect allowed transition versus hn,w here hn is the incident photon energy.F or MgFe 2 O 4 ,t he bandgap is in the range 1.7-1.9 eV,w hich is about 0.2 eV lower than the literature values. [30] The bandgap energy E g was determined by finding the intercept of the straight line in the low-energy rise of the plot of [F(R 1 ) hn] 1/2 for the indirect allowed transition versus hn,w here hn is the incident photon energy.F or MgFe 2 O 4 ,t he bandgap is in the range 1.7-1.9 eV,w hich is about 0.2 eV lower than the literature values.…”

Mini-review: Ferrite nanoparticles in the catalysis

“…For the case of ferrite nanoparticles, up to this moment, only copper, cobalt, nickel, zinc and several mixed-metal and core-shell ferrites are being applied in the catalytic reactions, mainly processes of the synthesis and destruction of organic compounds. Methods for their preparation are described elsewhere (Kasi Viswanath, Murthy, 2013;Pinheiro Bragam et al, 2011;Koferstein, 2013;Gatelite et al, 2011). The synthesis conditions have strongly influenced on the crystal structure, crystallite size, microstructure, magnetic and photocatalytic properties.…”

Investigations of superparamagnetism in magnesium ferrite nano-sphere synthesized by ultrasonic spray pyrolysis technique for hyperthermia application

“…Among the various ferrite compounds, magnesium ferrite (MgFe 2 O 4 ) nanoparticles is one of the most important functional soft magnetic materials. It has excellent chemical stability with inverse spinel structured, which have found a number of modern technological applications in microwave devices, catalysis, adsorption, gas and humidity sensor, ferrofluid technology, fuel cells, magnetic core of coils and also used in an inorganic pigment [11][12][13]. Aono et al [14] found that MgFe 2 O 4 has the highest heating ability compare to other commercial ferrite powders of MFe 2 O 4 (M = Mg, Mn, Fe, Co, Ni, Cu and Sr) in alternating magnetic field which is one of the interesting applications in hyperthermia therapy.…”