Effect of Cetyl trimethylammonium bromide (CTAB) amount on phase constituents and magnetic properties of nano-sized NiFe2O4 powders synthesized by sol–gel auto-combustion method

Alamolhoda, S.; Mirkazemi, S. M.; Shahjooyi, T.; Benvidi, N.

doi:10.1016/j.jallcom.2015.02.192

Cited by 19 publications

(9 citation statements)

References 39 publications

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“…Furthermore, the pH of sol controls the amount of H + or OH − ions in the sol that effectively determines the polymerization of the metal–oxygen bonds. Also, it is known that during the sol–gel process, complexing process with citric acid is sensitive to pH values [19, 20]. Therefore, homogeneity of the sol which is essential for phase formation would be determined by the pH of the solution.…”

Section: Introductionmentioning

confidence: 99%

Influence of pH Adjustment Parameter for Sol–Gel Modification on Structural, Microstructure, and Magnetic Properties of Nanocrystalline Strontium Ferrite

et al. 2018

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Synthesis of nanocrystalline strontium ferrite (SrFe12O19) via sol–gel is sensitive to its modification parameters. Therefore, in this study, an attempt of regulating the pH as a sol–gel modification parameter during preparation of SrFe12O19 nanoparticles sintered at a low sintering temperature of 900 °C has been presented. The relationship of varying pH (pH 0 to 8) on structural, microstructures, and magnetic behaviors of SrFe12O19 nanoparticles were characterized by X-ray diffraction (XRD), field emission scanning microscope (FESEM), and vibrating sample magnetometer (VSM). Varying the pH of precursor exhibited a strong effect on the sintered density, crystal structure and magnetic properties of the SrFe12O19 nanoparticles. As the pH is 0, the SrFe12O19 produced relatively largest density, saturation magnetization, Ms, and coercivity, Hc, at a low sintering temperature of 900 °C. The grain size of SrFe12O19 is obtained in the range of 73.6 to 133.3 nm. The porosity of the sample affected the density and the magnetic properties of the SrFe12O19 ferrite. It is suggested that the low-temperature sintered SrFe12O19 at pH 0 displayed Ms of 44.19 emu/g and Hc of 6403.6 Oe, possessing a significant potential for applying in low-temperature co-fired ceramic permanent magnet.

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Section: Introductionmentioning

confidence: 99%

Influence of pH Adjustment Parameter for Sol–Gel Modification on Structural, Microstructure, and Magnetic Properties of Nanocrystalline Strontium Ferrite

et al. 2018

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“…1) [34]. However, the lower magnetization of the as-calcined CU and MU samples in comparison with the as-calcined CCA and MCA samples can be attributed to the presence of antiferromagnetic a-Fe 2 O 3 , as evidenced from the XRD results [35]. Although the as-calcined CU and MU samples have finer particles in comparison with the citric acid samples, the lower coercivity may be on account of the antiferromagnetic a-Fe 2 O 3 ( Table 1).…”

Section: Methodsmentioning

confidence: 82%

Conventional versus microwave combustion synthesis of CoFe2O4 nanoparticles

Javadi

Masoudpanah

Zakeri

2016

J Sol-Gel Sci Technol

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Cobalt ferrite (CoFe 2 O 4 ) nanoparticles have been synthesized by sol-gel autocombustion method ignited by conventional and microwave heating techniques. The precursor solutions were prepared with different fuel types such as citric acid and urea. The ignition technique and fuel type affected the phase evolution, microstructure, and magnetic properties of CoFe 2 O 4 nanoparticles. X-ray diffraction results revealed that the single-phase and well-crystallized CoFe 2 O 4 nanoparticles would only be formed using citric acid as fuel and after calcination at 600°C. Microwave ignition resulted in the formation of larger sphere-like CoFe 2 O 4 particles, possibly due to the contribution of microwave-absorbing products in attaining of higher temperatures. Furthermore, the single-phase CoFe 2 O 4 nanoparticles synthesized by microwave ignition exhibited the higher saturation magnetization (Ms = 77 emu/g) compared to that of conventional method (Ms = 53 emu/g), due to their larger particle size and higher inversion coefficient.Graphical Abstract Magnetization curves of the ascombusted and as-calcined samples (CCA: conventional ignition with citric acid fuel, MCA: microwave ignition with citric acid fuel, CU: conventional ignition with urea fuel, and MU: microwave ignition with urea fuel).- M (emu/g) H (Oe)MCA-As calcined MU-As calcined MCA-As combusted CCA-As combusted CCA-As calcined CU-As calcined CU-As combusted MU-As combusted

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“…The diffraction peaks of MnFe 2 O 4 are progressively enhanced with the increase of pyrolysis temperature, which could be because the high temperature is conducive to crystallization. Based on Scheller's formula, the average grain size of the specimens is calculated by the following formula: 25,26 The calculated grain size of MnFe 2 O 4 at different pyrolysis temperatures is 19.70 nm, 29.66 nm and 33.73 nm, respectively. As a result, the higher pyrolysis temperature leads to the growth of larger crystalline grains.…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Fabrication of iron manganese metal–organic framework derived magnetic MnFe₂O₄/C composites for broadband and highly efficient electromagnetic wave absorption

Shu,

Zhang,

Liu

et al. 2023

J. Mater. Chem. C

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Effect of Cetyl trimethylammonium bromide (CTAB) amount on phase constituents and magnetic properties of nano-sized NiFe2O4 powders synthesized by sol–gel auto-combustion method

Cited by 19 publications

References 39 publications

Influence of pH Adjustment Parameter for Sol–Gel Modification on Structural, Microstructure, and Magnetic Properties of Nanocrystalline Strontium Ferrite

Influence of pH Adjustment Parameter for Sol–Gel Modification on Structural, Microstructure, and Magnetic Properties of Nanocrystalline Strontium Ferrite

Conventional versus microwave combustion synthesis of CoFe2O4 nanoparticles

Fabrication of iron manganese metal–organic framework derived magnetic MnFe₂O₄/C composites for broadband and highly efficient electromagnetic wave absorption

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Effect of Cetyl trimethylammonium bromide (CTAB) amount on phase constituents and magnetic properties of nano-sized NiFe2O4 powders synthesized by sol–gel auto-combustion method

Cited by 19 publications

References 39 publications

Influence of pH Adjustment Parameter for Sol–Gel Modification on Structural, Microstructure, and Magnetic Properties of Nanocrystalline Strontium Ferrite

Influence of pH Adjustment Parameter for Sol–Gel Modification on Structural, Microstructure, and Magnetic Properties of Nanocrystalline Strontium Ferrite

Conventional versus microwave combustion synthesis of CoFe2O4 nanoparticles

Fabrication of iron manganese metal–organic framework derived magnetic MnFe2O4/C composites for broadband and highly efficient electromagnetic wave absorption

Contact Info

Product

Resources

About

Fabrication of iron manganese metal–organic framework derived magnetic MnFe₂O₄/C composites for broadband and highly efficient electromagnetic wave absorption