THE CHARACTERIZATION STUDY OF FERRITES (MAGNESIUM AND MANGANESE) USING SOL GEL METHOD (Kajian Pencirian untuk Ferit (Magnesium dan Mangan) Menggunakan Kaedah Sol Gel) (original) (raw)
Related papers
Study of magnesium ferrite nano particles with excess iron content
Physica B: Condensed Matter, 2014
Stoichiometric and non stoichiometric magnesium ferrite (MgFe 2 þ δ O 4 , δ¼0.0, 0.1) were synthesized by the sol gel combustion method resulting in nanocrystalline powders with size ranging from 10 to 100 nm. These powders were calcined at various temperatures (300-800 1C). One part of the calcined powder was quenched in liquid nitrogen and the other part furnace cooled. α-Fe 2 O 3 was observed in all calcined samples by XRD and this was also reflected in the magnetization data. Electrical response of MgFe 2.1 O 4 þ δ spinel phase to 75 ppm ethanol was found to be greater than that for a stoichiometric magnesium ferrite.
Journal of Saudi Chemical Society, 2016
Crystalline magnesium ferrite (MgFe 2 O 4) spinel oxide powder was synthesized by nitrate-citrate sol-gel auto-combustion process with stoichiometric composition of metal nitrate salts, urea and citric acid. The study was focused on the modification of synthesis conditions and effect of these modified conditions on the structural and electrical properties of synthesized MgFe 2 O 4 ceramic materials. Phase composition, crystallinity, structure and surface morphology were studied by X-ray diffraction, FTIR and SEM. Pure single phase MgFe 2 O 4 spinel ferrite was obtained after calcination at 850°C. Rietveld refinement of XRD result confirmed the single cubic phase spinel oxide with the lattice constant of a = 8.3931 Å and Fd3m symmetry. UV-visible absorption study of calcined powder revealed an optical band gap of 2.17 eV. SEM images of sintered specimens (1050-1450°C) showed that the grain size increased with the increase in sintering temperature. From the impedance results of the sintered MgFe 2 O 4 specimens, it was found that the resistance of grain, grain boundary and electrode effect decreased with an increase in sintering temperature and associated grain growth. In the intermediate frequency region lowering of impedance and dielectric values was observed due to the decrease in grain boundary areas. Mo¨ssbauer studies
Effect of Calcinations on Characterizations of Fabricated Nano Manganese Ferrite
Advanced Materials Research, 2013
A citric acid anionic surfactant has been applied for nano manganese ferrite (MnFeO3) fabrication using sol gel method. The calcinations have been varied for 300, 600 and 800oC. The UVDR (UV-Vis Diffused Reflectance) analysis shows a high absorptive band gap after 400 nm for the 600oC calcinated MnFeO3. The DTA (Differential Thermal Analysis) profiles exhibit remarkably trapped volatile matters (H2O, CO2, and NO2) in the fabricated MnFeO3 under sol gel heat treatment at 100oC and the peaks disappeared as the calcination increased to 600oC. As the temperature elevated from 100 to 300oC, the absorption peaks of volatile components are disappeared as demonstrated clearly by the FTIR (Fourier Transform Infrared) spectra of the fabricated material, which 3393 cm-1 corresponded to OH group, 1624 cm-1 to CO group, and 1384 cm-1 to NO group. The XRD (X-Ray Diffraction) spectra show clearly the alteration process from amorphous to crystalline structure as the calcinations increased from 300 ...
Investigation of Magnesium Ferrite Spinel Solid Solution with Iron-Rich Composition
2013
The structural and morphological properties of MgFeO system were determined by using X-ray diffraction (XRD), Scanning electron micrographs (SEM), Infrared (IR) and Energy dispersive X-ray (EDX) techniques. Combustion method resulted in formation MgFeO system in one step. The results revealed that the as prepared solids consisted entirely of well nanocrystalline spinel magnesium ferrite solid solution with iron-rich composition, MgFe2O4.xFe2O3, depending upon XRD data. SEM shows formation of nanomaterials with sponge-like structure. The concentration of constituents, involved in the as synthesized material was determined by using EDX technique. In fact, it was found the concentration of Mg, Fe and O species changes from the uppermost surface layer to the bulk of the system studied.
International Journal of Engineering Research and Technology (IJERT), 2021
https://www.ijert.org/a-comprehensive-review-of-different-synthesis-processes-involved-for-the-preparation-of-magnesium-ferrite https://www.ijert.org/research/a-comprehensive-review-of-different-synthesis-processes-involved-for-the-preparation-of-magnesium-ferrite-IJERTCONV9IS11036.pdf An effort was made to study the different synthesis process involved in magnesium ferrite. The approaches of research of spinel ferrites show a very significant role in defining the chemical, magnetic, & structural properties. In direction to accomplish these indistinct properties, the size & morphology of MgFe2O4 have been calculated by using numerous synthetic methods i. e co precipitation, sol-gel, mechanochemical, combustion, microwave hydrothermal & polymerization method.
SUGARCANE JUICE BASED SOL-GEL METHOD FOR MN SUBSTITUTED MAGNESIUM FERRITES
Manganese substituted magnesium ferrites having stoichiometric composition Mg1-xMnxFe2O4 with x ranging from 0.0 to 1.0 were prepared sugarcane juice based Sol-gel method. X-ray diffraction was used to characterize the structure and phases present respectively. It was found that of all ferrite compositions at 800?C led to cubes of the ferrite grains and that there was single phase spinel structure. The X-ray diffraction patterns revealed the presence of (311) peak as the most intense one. The crystallite size was found to be within the range of 24-48 nm. Activation energy of resultant samples decreases from 0.45 ? 0.02 eV (x = 0.0) to 0.35 ? 0.02 eV (x = 1.0).
Science of Sintering, 2021
This report presents the synthesis of magnesium ferrite (MgFe2O4) by coprecipitation method and its subsequent characterization by using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) techniques. XRD results confirm the formation of single phase cubic spinel structure, having lattice constant from 8.3216 ? to 8.3252 ?. An infrared spectroscopy study confirms the presence of two main absorption bands indicating tetrahedral and octahedral group complexes, within the spinel lattice. We also report hopping length (LA and LB), strain (?) and dislocation density (?D) of ferrite sample.
Journal of Nanoscience and Nanotechnology, 2008
Nanoparticles having particle size in the range 25–40 nm for compositions x = 0.0, 0.2, 0.4 and 0.5 of MgxMn1−xFe2O4 spinel ferrite system have been prepared by chemical co-precipitation route. The microstructure, infrared spectral and elastic properties have been studied by means of energy dispersive analysis of X-rays (EDAX), transmission electron microscopy (TEM), X-ray diffraction (XRD) and infrared spectroscopic (IR) measurements, before (W) and after high temperature annealing A(W). The force constants for tetrahedral and octahedral sites determined by infrared spectral analysis, lattice constant and X-ray density values by X-ray diffraction pattern analysis; have been used to calculate elastic constants. The magnitude of force constant and elastic moduli for nanocrystalline W-samples are found to be larger as compared to coarse grained A(W)-samples. The results have been explained in the light of redistribution of cations and as a result change in mean ionic charge for such c...
International Journal of Applied Ceramic Technology, 2013
A novel solution combustion method has been used to prepare Mg-Mn ferrites of various compositions, Mg 0.9 Mn 0.1 Fe 1-x O 4 where x = 0.2, 0.4, 0.6, 0.8, and the properties were investigated in the present work. Nano-size Mg-Mn ferrite particles with diameter in the range of 8~15 nm were successfully formed via this method. The combustion temperature of the oxidation-reduction was apparently occurred at 200°C. The result of X-ray diffraction (XRD) analysis indicated that the as-burnt powder affords a pure single spinel ferrite phase at low temperature. The thermal analysis of nitrate-citrate gels was characterized by DTA-TG. The TEM and SEM observations give the morphology and microstructure of the products. The dielectric properties of the sintered Mg-Mn ferrites were investigated by using HP/Agilent 4291B RF impedence/material analyzer. It was found that there was no maximum dielectric loss within the measured frequency range until 1 GHz due to excellent compositional control in this method. *afauzi@eng.usm.my
Mg-Zn Nano ferrites having chemical formula Mg 1-x Zn x Fe 2 O 4 (where x=0.0, 0.2, 0.4, 0.6, 0.8, 1.0) were synthesized by the citrate-gel auto combustion method. Synthesized powders were sintered at 500 o C for four hours in air and characterized by XRD, SEM and EDS.XRD analysis shows that cubic spinal structure of the ferrites and the crystalline sizes (D) were found in the range 25-35 nm. The values of the lattice parameter (a) increases and X-ray density (d x ) increases with doping of Zn content. Scanning Electron Microscopy (SEM) studies revealed Nano nature of the samples. An elemental composition of the samples was studied by using Energy Dispersive Spectroscopy (EDS). The observed results can be explained on the basis of composition and crystallite size.