نتایج جستجو برای: spinel ferrites

تعداد نتایج: 4867  

Journal: :Journal of Materials Science: Materials in Electronics 2021

Nanocrystalline Li0.35Ni0.3Fe2.35O4 ferrites were prepared at different annealing temperatures by sol–gel auto-combustion method. The effects of the temperature on structure and magnetic properties synthesized Li–Ni characterized X-ray diffraction (XRD), scanning electron microscopy, Fourier transform infrared spectra Vibrating Sample Magnetometer, photoelectron spectrometer. Rietveld refinemen...

Journal: :Symmetry 2023

Developing a method for preparing Ni and Mn ferrites was the main objective of this study due to importance these materials in high-frequency applications. These were made by assisting combustion with dried leaves Corchorus olitorius then heating them 700 °C. Several methods, including FTIR, XRD, TEM, SEM/EDX, used characterize ferrites. The thermal behavior, surface magnetic properties as-prep...

Journal: :Materials Research Bulletin 2021

• Nanostructured cobalt ferrites' magnetic properties. “Janus effect” of starch coating on ferrite magnetization. Co-precipitation and hydrothermal methods/starch – increased Mechanochemical microemulsion decreased To investigate the behavior starch-coated ferrites, well-established synthetic methods, i.e., coprecipitation, mechanochemical, ultrasonically assisted microemulsion, microwave-assis...

2009
Nelcy D. S. Mohallem Juliana Batista da Silva

Nickel ferrites have been extensively studied due to their numerous applications in electronic devices, microwave adsorbents, corrosion protectors, magnetic fluids and catalysts [1-5], among others. Nickel ferrite is a soft material with inverted spinel with the tetrahedral site (A) occupied by Fe and the octahedral site occupied by Fe and Ni. It is applied to devices that require easy magnetiz...

Journal: :Environmental Chemistry Letters 2021

Abstract The rapid urbanization and industrialization is causing worldwide water pollution, calling for advanced cleaning methods. For instance, pollutant adsorption on magnetic oxides efficient very practical due to the easy separation from solutions by an field. Here we review synthesis performance of such as iron oxides, spinel ferrites, perovskite remediation. We present structural, optical...

ژورنال: مواد پرانرژی 2015

Mixed spinel nanocrystals have captured the attention of scientist in the field for their catalytic activity in decomposition of hydrogen peroxide. In this study nanocatalysts MnFe2O4, Co3O4, Pb3O4, Co0.5Zn0.5Fe2O4 and Co0.5Mn0.5Fe2O4 were synthesized by co-precipitation method. The synthetic samples were characterized by XRD patterns, SEM images and IR spectroscopy. The size of the nanoparticl...

Journal: :Journal of Physics and Chemistry of Solids 2021

Lanthanum doped Z n 0.5 C o L a x F e 2 − O 4 spinel ferrites were synthesized through the co-precipitation technique. To characterize structural, vibrational, electro-optical, dielectric, and thermoelectric properties, following characterization techniques X-ray diffraction (XRD), Fourier transformation infrared (FTIR) Raman spectroscopy, I–V measurement analysis, UV–vis LCR meter, Seebeck Ene...

Journal: :Processes 2022

The magnesium nanosized ferrite powder with formula MgFe2O4 was synthesized via a pyrochemical sol–gel glycine–nitrate method and annealed consistently at temperatures of up to 1300 °C. samples’ microstructure studied by SEM XRD methods. According the results studies, increase in nanoparticles size from about 15 nm micron-sized particles observed when increasing annealing temperatures. DC elect...

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