Physical and spectral studies of Mg-Zn ferrite prepared by different methods

Abstract

Nano particle of Magnesium Zinc ferrite (Mg 1-x Zn x Fe 2 O 4 , where x = 0, 0.1, 0.2, 0.3, 0.4 and 0.5) have been prepared using the standard ceramic technique and mechanical ball milling method. X-ray diffraction (XRD), (IR) spectra, and scanning electron microscope (SEM) examinations were carried out to characterize the prepared samples. Single phase cubic spinel structure with a ma n peak (311) at 2Ɵ = 34 o was observed for all studied samples. The crystallite size was found to be within the range 37-65 nm. From IR spectra, the absorption bands at 605 cm-1 (ν 1) and 435 cm-1 (ν 2) were observed and are assigned to tetrahedral (A site) and octahedral (B site) groups complex respectively. The morphological study which was performed using scanning electron microscopy (SEM) shows agglomerated grains with different shapes and sizes. The initial permeability was measured at different frequencies. The fast decrease in initial permeability µi at Tc is a good reason to be a very strong candidate for magnetic switch devices.

AZ31 magnesium alloy with ultrafine grains as the anode for Mg-air battery

“…The AZ31 magnesium anode with ultrafine grains (667.28 ± 291.35 nm) is prepared via spark plasma sintering of the alloy powder that has been treated by employing high-energy ball milling. 16 Akin to the precursor AZ31 with the average grain size of 472.89 ± 154.31 μm, the ultrafine-grained AZ31 also exhibits low dislocation density, weak grain orientation, and dispersed nano-scale Al3Mn phase. This modified AZ31 is adopted as the anode of Mg-air battery for the first time; its discharge and corrosion behaviour is in comparison with that of precursor AZ31 anode.…”

“…In this work, we fabricate the AZ31 magnesium anode with ultrafine grains by using the spark plasma sintering of the alloy powder that has been treated through high-energy ball milling at room temperature. The process of ball milling can create nanocrystals in the alloy powder [16,17], while the spark plasma sintering mitigates the grain growth due to its rapid heating rate and short sintering period [18]. To our knowledge, this is the first time that the bulk metal anodes with ultrafine grains (＜1 μm) are used in primary aqueous batteries.…”

Application of a novel biological-nanoparticle pretreatment to Oscillatoria acuminata biomass and coculture dark fermentation for improving hydrogen production

“…Nano ferrite nanoparticles in the chemical formula Mg 1-x Zn x Fe 2 O 4 (x = 0.1) were kindly provided by Dr. Ahmed Henaish, Physics Department, Faculty of Science, Tanta University, Tanta, Egypt. Mg-Zn Fe 2 O 4 -NPs were synthesized using mechanical ball milling method [ 76 ].…”

Ferroelectric and Dielectric Properties of Strontium Titanate Doped with Barium

“…A ferroelectric BST (x = 0, 0.2, 0.4, 0.6, 0.8 and 1) system was prepared by the tartrate precursor method [18]. Figure 1 shows the tartrate precursor method.…”