Effect of Fuel on the Synthesis, Structural, and Magnetic Properties of M-Type Hexagonal SrFe12O19 Nanoparticles

Abstract

The aim of this work is to compare the formation temperatures, structural, and macroscopic magnetic properties of Sr-hexaferrite (SrM) in the presence of different fuels. In this research, SrM powder was synthesized by a sol-gel auto-combustion route using different hydroxycarboxylic acids: citric acid, tartaric acid, sucrose (gluconic acid), and lactic acid. Completion of reaction was followed by Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). The obtained powders were further characterized by thermal gravimetric analysis-differential thermal analysis (TGA-DTA), energydispersive spectroscopy (EDS), and scanning electron microscopy (SEM). Their magnetic properties were studied using Mössbauer spectroscopy and magnetic measurements were done by vibrating sample magnetometer (VSM). The influence of different fuels was reflected on the formation temperature, phase purity, and morphology of crystallites as well as on their magnetic properties. The results show the finest crystallite size has been obtained as 27.85 nm (from XRD) in the case of sucrose sample. The lowest

Study on structural and magnetic properties of nanosized M-type Ba-hexaferrites synthesized by urea assisted citrate precursor route

“…6) whilst the desorption branch shows hysteresis between 0.8 and 1.0 relative pressure characteristic of mesopores in these nanostructures. The adsorption isotherms can often be associated with porous materials consisting of agglomerates of particles with approximately uniform spheres [38]. The remarkable S BET surface area and pore surface volume are found to 34.86 m 2 /g and 0.97987 cm 3 g À1 respectively and pore dimensions in the series is consistent with greater pore size distribution (25.62 nm), calculated by BJH method.…”

“…The S ⁄ and R ⁄ blocks have equivalent atomic arrangements, but are rotated at 180°with respect to S and R blocks around c-axis. S or S ⁄ block consists of two O 2À layers; while R or R ⁄ block contains three O 2À layers, with one oxygen site in the middle layer substituted by Ba 2+ ion [18,28,41]. There are 64 ions per unit cell on 11 sites of different symmetry.…”

“…When other ions were incorporated into BaM structure, their saturation magnetization, coercivity, anisotropy field and magnetic resonance frequency were changed [14][15][16][17]. Theoretical value of coercive field H C = 6700 Oe was estimated for BaM [18] and critical size of single-domain insulated spherical particles was predicted to 0.5 mm [19]. Ferrites with particle size around 1 mm can be produced by standard ceramic technology.…”

“…Various processing techniques have been employed to synthesize hexagonal ferrites, especially by standard ceramic [20,21] or mechanochemical processing [22] and various wet methods [18,[23][24][25][26][27][28][29][30][31]. But their correlation between the dopant substitution and effect on their structural as well as magnetic properties are still seemed a point of explanation.…”

Influence of Substituted Elements on Reflection Loss of Ba-Ferrite Nanoparticle

“…BaFe 12 O 19 has wave absorption band of several gigahertz, as it has high coercive force and high magnetic anisotropy [2] by the Fe 3+ ion on the 2b, 4f 2 site in its magnetoplumbite structure. ion on the ferrite structure [3][4][5][6][7][8][9][10][11]. In this study, we investigated wave absorption range change of of BaFe 10 XTiO 19 (XTiM, X = Co, Cu, Ni, Zn) nanopowder according to change of magnetization easy axis by combination of divalent element (Co, Cu, Ni, Zn) and tetravalent element (Ti).…”