scholarly journals Investigation of the structural, optical, elastic and electrical properties of spinel LiZn2Fe3O8 nanoparticles annealed at two distinct temperatures

RSC Advances ◽  
2019 ◽  
Vol 9 (70) ◽  
pp. 40940-40955 ◽  
Author(s):  
D. Bouokkeze ◽  
J. Massoudi ◽  
W. Hzez ◽  
M. Smari ◽  
A. Bougoffa ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Spinel Structure ◽  
Sol Gel ◽  
Combustion Method ◽  
Annealing Temperatures ◽  
Auto Combustion ◽  
Two Distinct Temperatures

Nanoparticles of Li0.5ZnFe1.5O4 (LiZn2Fe3O8) with the spinel structure were prepared by a sol–gel auto-combustion method at two different annealing temperatures.

Structural, morphological and magnetic properties of Mn2+ ions substituted nanosized nickel–copper–cobalt ferrites through sol–gel auto-combustion method

2019 ◽  
Vol 34 (01) ◽  
pp. 2050002
Author(s):  
Wei Zhang ◽  
Aimin Sun ◽  
Xiqian Zhao ◽  
Xiaoguang Pan ◽  
Yingqiang Han
Keyword(s):  
Magnetic Properties ◽  
Saturation Magnetization ◽  
Spinel Structure ◽  
Remanent Magnetization ◽  
Cobalt Ferrite ◽  
Sol Gel ◽  
Combustion Method ◽  
Magnetic Data ◽  
Nickel Copper ◽  
Auto Combustion

Manganese substituted nickel–copper–cobalt ferrite nanoparticles having the basic composition [Formula: see text] (x = 0.0, 0.1, 0.2, 0.3 and 0.4) were synthesized by sol–gel auto-combustion method. X-ray diffraction (XRD) was used to estimate phase purity and lattice symmetry. All the prepared samples show the single-phase cubic spinel structure. Fourier transform infrared (FTIR) measurements also confirm the cubic spinel structure of the ferrite that is formed. The preparation of samples show these nearly spherical particles by Transmission electron microscopy (TEM). The magnetic properties of Mn[Formula: see text] ion substituted in nickel–copper–cobalt ferrite were studied by Vibrating sample magnetometer (VSM). The saturation magnetization ([Formula: see text]), remanent magnetization [Formula: see text], coercivity [Formula: see text], magnetic moment [Formula: see text] and anisotropy constant [Formula: see text] first increase and then decrease with the increase of [Formula: see text] ions content. They had better magnetism than pure sample and other substituted samples when the substitution amount of [Formula: see text] ions was [Formula: see text]. At [Formula: see text], the maximum values of remanent magnetization [Formula: see text], saturation magnetization [Formula: see text] and coercivity [Formula: see text] are 25.58 emu/g, 61.95 emu/g and 689.76 Oe, respectively. This indicates that the magnetism of ferrite can improve by substituting with the appropriate amount of manganese. However, due to the excess [Formula: see text] ions instead, ferrite magnetism is weakened. This means that these materials can be used in magnetic data storage and recording media.

scholarly journals Composition, Microstructure, and Electrical Properties Control of the Powders Synthesized by Sol–Gel Auto-Combustion Method Using Citric Acid as the Fuel

2017 ◽  
Vol 12 (1) ◽  
Author(s):  
Bogdan K. Ostafiychuk ◽  
Larysa S. Kaykan ◽  
Julia S. Kaykan ◽  
Bogdan Ya. Deputat ◽  
Olena V. Shevchuk
Keyword(s):  
Citric Acid ◽  
Electrical Properties ◽  
Sol Gel ◽  
Combustion Method ◽  
Auto Combustion

scholarly journals Effect of Cu Substitution on Magnetic Properties of Co0.6Ni0.4Fe2O4 Nanoferrites

2021 ◽  
Vol 12 (2) ◽  
pp. 1899-1906
Keyword(s):  
Grain Size ◽  
Spinel Structure ◽  
Sol Gel ◽  
Combustion Method ◽  
Lattice Parameter ◽  
Fesem Image ◽  
Absorption Bands ◽  
Cu Substitution ◽  
Ferrite Structure ◽  
Auto Combustion

This work is focusing on synthesizing the cobalt nanoferrite materials substituted by copper forming Co0.6Ni0.4-xCuxFe2O4 with x = 0.0, 0.1, and 0.3 using the sol-gel auto-combustion method. The phase analysis of XRD showed the spinel structure with the lattice parameter in the range 8.36-8.39 Å. FESEM image showed the grain size initially decreasing and then increasing with Cu concentration. The FTIR curve's two absorption bands in the specified range of frequency assured the spinel nano ferrite structure. The values of remanent ratios obtained from VSM showed their isotropic nature forming single domain ferrimagnetic particles.

Synthesis and Characterization of Cobalt Ferrite Nanoparticles via Sol-Gel Auto Combustion Method

2020 ◽  
Vol 307 ◽  
pp. 58-63
Author(s):  
Che Zaheerah Najeehah ◽  
Kashif Tufail Chaudhary ◽  
Jalil Ali
Keyword(s):  
Crystallite Size ◽  
Spinel Structure ◽  
Cobalt Ferrite ◽  
Sol Gel ◽  
Combustion Method ◽  
Spectral Lines ◽  
Hysteresis Curve ◽  
X Ray ◽  
Tauc Plot ◽  
Auto Combustion

This article reports the synthesis of cobalt ferrite (CoFe2O4) nanoparticles by low-cost sol-gel auto combustion method. The synthesized CoFe2O4 nanoparticles were characterized using X-ray Diffraction (XRD), Field Emission Scanning Electron Microscope (FESEM), Energy Dispersive X-ray (EDX), UV-Visible (UV-Vis), Fourier Transform Infrared Spectroscopy (FTIR) and Vibrating Sample Magnetometry (VSM). The XRD pattern inferred the formation of cubic spinel structure with average crystallite size 35.3 nm. The crystallite size was obtained in the range 32-37.5 nm in FESEM analysis. The elemental composition was confirmed using EDX spectroscopy. The presence of spectral lines at positions 465.57 cm-1 and 577.52 cm-1 associated to stretching vibrations of Co-O in octahedral sites and Fe-O in tetrahedral sites confirmed the spinel structure. The magnetic properties such as saturation magnetization (Ms) 67.79 emu/g, coercivity (Oe) 874.76 Oe and remnant (Mr) 29.07 emu/g were obtained from the hysteresis curve. The bandgap 1.409 eV was obtained for synthesized CoFe2O4 using Tauc plot from UV-Vis absorption spectra.

scholarly journals Preparation and studies of electrical properties of cobalt substituted Li-Zn ferrites by sol-gel auto combustion method

2009 ◽  
Vol 83 (3) ◽  
pp. 285-290 ◽  
Author(s):  
Ibetombi Soibam ◽  
Sumitra Phanjoubam ◽  
H. B. Sharma ◽  
H. N. K. Sarma ◽  
Chandra Prakash
Keyword(s):  
Electrical Properties ◽  
Sol Gel ◽  
Combustion Method ◽  
Auto Combustion

Preparation and electrical properties of gadolinium-doped strontium tungstate electrolyte for SOFC

2020 ◽  
Vol 13 (03) ◽  
pp. 2050010
Author(s):  
Jihai Cheng ◽  
Ming Wang
Keyword(s):  
Electrical Properties ◽  
Electrochemical Impedance ◽  
Sol Gel ◽  
Combustion Method ◽  
Xrd Analysis ◽  
Doping Amount ◽  
Sintered Ceramic ◽  
Auto Combustion ◽  
Electrical Conductivities ◽  
Text Content

Gadolinium-doped strontium tungstate (Sr[Formula: see text]GdxWO[Formula: see text]) powders were synthesized by the sol–gel auto-combustion method, and their electrical properties were investigated. The phase formation of Sr[Formula: see text]GdxWO[Formula: see text] powders was studied by the X-ray diffraction (XRD) analysis. The characterization of microstructure was carried out on the sintered ceramic discs. Electrochemical impedance spectroscopy (EIS) was used to estimate the electrical properties. The results displayed that these crystalline powders were scheelite-type tetragonal structures and demonstrated higher sinterability. The Sr[Formula: see text]GdxWO[Formula: see text] electrolyte ceramics with a relative density over 95% of the theoretical density were obtained after the sintering process. The electrical conductivities of Sr[Formula: see text]GdxWO[Formula: see text] increased significantly with increasing of doped-Gd[Formula: see text] content and reached [Formula: see text] S[Formula: see text]cm[Formula: see text] at 800∘C, when the doping amount was [Formula: see text]. At last, this study demonstrated that Sr[Formula: see text]GdxWO[Formula: see text] is an effective strategy to optimize middle or low-temperature SOFC.

scholarly journals Structural, magnetic and electrical properties in Al-substitued NiZnCo ferrite prepared via the sol–gel auto-combustion method for LTCC technology

RSC Advances ◽  
2017 ◽  
Vol 7 (62) ◽  
pp. 39198-39203 ◽  
Author(s):  
Le-Zhong Li ◽  
Xiao-Xi Zhong ◽  
Rui Wang ◽  
Xiao-Qiang Tu ◽  
Lei He ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Sol Gel ◽  
Combustion Method ◽  
Auto Combustion ◽  
Magnetic And Electrical Properties

Al-substituted NiZnCo ferrite, Ni0.4Zn0.5Co0.1AlxFe2−xO4 (0 ≤ x ≤ 0.20), were synthesized by the sol–gel auto-combustion method.

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