Manganese substituted magnesium ferrites having stoichiometric composition Mg 1-x Mn x Fe 2 O 4 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 Xray diffraction patterns revealed the presence of (311) …………………………………………………………………………………………………….... Introduction:-Nanoscale crystalline mixed metal oxides are synthesized by several mechanical and chemical methods. The main objective is to reduce the costs of chemical synthesis and to produce materials for technological applications [1][2][3][4][5]. Among the several methods, high random distribution of the metal ions or complexes are based on the use of a matrix are fix (solution or gel). This increases the chemical homogeneity and reduces the segregation of a particular metal during the processing and crystallization of the mixed metal oxides [6][7]. In these chemical methods, the metal ions are immobilized on an atomic scale, which allows obtaining oxides at lower temperatures than solid state reaction. Due to the immobilization, the metal ions react with each other with a minimum diffusion; consequently, it is possible to synthesize homogeneous and stoichiometric oxides [8][9]. Sol-gel is one of the best techniques with these characteristics [10]. In these techniques, the particle size can be controlled by the formation and aggregation of the particles in the starting sol, which is dependent on the concentration of reagents, temperature, pH, electro negativity of the metals, solvent etc. [11][12][13][14][15]. Besides the versatility and simplicity water is the most polar solvent, the aqueous solution-gel method can offer a better chemical homogeneity compared to other solvents. Therefore, aqueous solution-gel synthesis method was tested to produce cheap nanocrystalline powders.This new technique is based on the use of sugarcane juice as the chelating agent, and it stands out by its simplicity, low processing cost and reduces environmental pollution, using sugarcane juice and metal nitrates nano-crystalline mixed metal oxides are synthesized. The process is similar to previous work [16]. In this paper, the chemical route is similar but sugarcane juice is used as the chelating agent for the synthesis of nanoscale Mn Substituted MgFe 2 O 4 for the study of electrical resistivity.
The nanocrystalline Mg 1-x Mn x Cr 2 O 4 (X=0.0, 0.25, 0.50, 0.75 and 1.0) chromite were synthesized by sol-gel autocombution route. Thermal analysis of precursor after autocombution was carried out by TG-DTA. X-ray diffraction confirmed the formation of single cubic spinel lattice for all compositions. Lattice parameter shows increasing trend with an increase in Mn content. Formation of spherical nanoparticals were revealed by scanning electron microscopy (SEM).The elemental analysis obtained by EDAX is in close agreement with the expected composition from the stoichiometry of reactant used. The magnetic data indicate that, all compositions are ferrimagnetic in nature. The detailed results of XRD, thermal analysis, SEM, EDAX and magnetic properties indicating the role of substitution of manganese metal ions on the structural and magnetic properties of magnesium chromites are presented.Copy Right, IJAR, 2017,. All rights reserved. …………………………………………………………………………………………………….... Introduction:-Mixed metal oxides are an important class of compounds and among them chromites are most prominent by virtue or their spinel structure with high thermodynamic stability. The interest in these oxides emerges from their versatile applicability in telecommunication, power transformers, audio and video and many other applications involving electrical signals. Oxides spinel have been extensively studied by several workers [1][2][3] in order to elucidates the relationship between structure, bonding and magnetic properties because of technological potential of these materials. The benefit found in the oxides due to their structural and chemical variations on a nano scale, which are important for developing optimal magnetic properties [4][5][6]. Now a day fine particles of spinel oxides synthesized by chemical methods were shown to have magnetic properties markedly different from those prepared by the ceramic method. The various processing techniques, which are used for the synthesis of mixed metal oxides powders, include hydrothermal [7][8], microwave refluxing [9-11,], sol-gel [12][13][14], and co precipitation [15][16][17]. Among the Mn oxide spinel structured Ni-Mn, Cu-Mn oxides are referred to as negative temperature coefficient thermistors. Materials of mixed metal oxide with low Hc are called magnetically soft while those with higher values are called hard materials. The soft materials have high permeability and are used in applications at high frequencies [18].The aim of present investigation is to synthesize the novel manganese substituted magnesium chromite nanoparticles by using sol-gel autocombution route. It is a simple process, which offers a significant saving in time and energy consumption over the traditional methods, and requires less sintering temperature. This method is employed to
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.