Thermally activated sintering–coarsening–coalescence-polymerization of amorphous silica nanoparticles

Chen, Zih-Ling; Shen, Pouyan

doi:10.1016/j.ceramint.2012.08.088

Cited by 8 publications

(3 citation statements)

References 21 publications

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“…Figure 4 shows the ATR spectra of FeSiO 2 alloys as a function of milling time. In all spectra of the various samples, there is a strong and broad absorption band ranging from approximately 800 cm −1 to 1200 cm −1 , which is associated with the stretching vibration of Si-O-Si [37][38][39].…”

Section: Atr Characterizationmentioning

confidence: 99%

The impact of Cu, Ni and Fe₂O₃ on the magnetic behavior and structural properties of FeSiO₂ nanocomposite synthesized through ball milling

Younes,

Amraoui,

Manseri

et al. 2023

Phys. Scr.

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The nanocomposite Fe-A/SiO2 soft magnetic materials, with Cu, Ni, and Fe2O3 as dopants, were produced using a mechanical alloying technique. Our central objective was to explore the impact of process parameters on Fe/SiO2 nanocomposite properties. We assessed varying milling time and dopant addition rates, analyzing structural, morphological, and magnetic aspects through SEM, EDS, XRD, and VSM at different synthesis stages. The XRD pattern revealed iron, Fe(Ni), Fe(Cu), and Fe2O3 with an average crystallite size of 28–39 nm and lattice strain of 0.0097%–0.0222%. Notably, the lattice parameters decreased from 0.2852 to 0.2836 nm. Among nanocomposites, FeCu/SiO2 displayed the smallest crystallite size (34.3 nm), while FeNiSiO2 showed the highest lattice parameter (0.2853 nm). The ATR analysis unveiled Si–O–Si stretching vibrations at 1052 cm−1, intensifying with milling time. The inclusion of Cu and Ni in the FeSiO2 system significantly influenced the Si–O–Si bond. Coercivity and remanence magnetization in Fe/SiO2 increased notably with milling time, reaching 68.47 Oe and 8.73 emu g−1, respectively. The Fe/Fe2O3/SiO2 and FeSiO2 nanocomposites exhibited the maximum values of coercivity (47.07 Oe) and remanence magnetization (12.24 emu g−1). Remarkably, the Fe/SiO2 nanocomposite displayed the highest saturation magnetization, measuring an impressive 176.07 emu g−1 after 30 h of milling, while FeCu/SiO2 reached 165.64 emu g−1 after 20 h. Overall, our findings suggest the Fe/SiO2 nanocomposite as a promising high-frequency soft magnetic material.

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Section: Atr Characterizationmentioning

confidence: 99%

The impact of Cu, Ni and Fe₂O₃ on the magnetic behavior and structural properties of FeSiO₂ nanocomposite synthesized through ball milling

Younes,

Amraoui,

Manseri

et al. 2023

Phys. Scr.

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“…This band consists of two strong peaks located at 1078 cm −1 and 1163 cm −1 . These peaks are associated with the stretching vibration of Si-O-Si [24][25][26][27][28]. In addition, bending vibrations attributed to Si-O-Si [26][27][28] located at 455, 509, 778, and 800 cm −1 are observed in the spectrum.…”

Section: Fourier Transformed Infrared Spectroscopy (Ftir) and X-ray P...mentioning

confidence: 99%

“…These peaks are associated with the stretching vibration of Si-O-Si [24][25][26][27][28]. In addition, bending vibrations attributed to Si-O-Si [26][27][28] located at 455, 509, 778, and 800 cm −1 are observed in the spectrum. The bands located at 555 cm −1 and 950 cm −1 are associated with Si-O bending vibrations of no bridging Si-OH bonds and stretching vibration respectively [29][30][31].…”

Section: Fourier Transformed Infrared Spectroscopy (Ftir) and X-ray P...mentioning

confidence: 99%

Fabrication, Design and Characterization of 1D Nano-Fibrous SiO2 Surface by a Facile and Scalable Method

Khouchaf

Oufakir

2022

Crystals

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In this paper, new 1D nano-fibrous SiO2 with functionalized surfaces is prepared. First, the effect of dispersion on the morphology and the surface properties of the silica SiO2 compounds are investigated. Second, energy dispersive spectrometer (EDS) and variable pressure scanning electron microscope (VP-SEM) show typically pure and fibrous texture on the surface of SiO2. Third, the presence of the bridging oxygen stretching vibration Si–O–Si, as well as the increase in the intensity ratio between Si-OH band and Si-O-Si are revealed by (FTIR) spectroscopy. Furthermore, X-ray diffraction (XRD) validates the conservation of the SiO lattice after chemical treatment through the KOH for both dispersed and non-dispersed samples. In addition, the shift of the XRD main peak (101) is in good agreement with the FTIR results showing the shift of Si-O-Si peak and the increase in the intensity ratio of Si-OH/Si-O-Si. The dispersed SiO2 sample exhibits a promising functionalized surface with satisfactory results in terms of silica nanofibers crystallinity and chemical composition. As a result, gigh resolution transmission electron microscopy (HR-TEM) data corroborate the claim of the presence of SiO2 nanofibers on the surface from 20nm to 250nm. New nano-fibrous SiO2 surfaces will be used to improve interfacial bonding strength between SiO2 compounds and polymer (or organic materials).

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Onset sintering-coarsening-coalescence kinetics of calcite powders

Lin

Shen

2013

Journal of the European Ceramic Society

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Thermally activated sintering–coarsening–coalescence-polymerization of amorphous silica nanoparticles

Cited by 8 publications

References 21 publications

The impact of Cu, Ni and Fe₂O₃ on the magnetic behavior and structural properties of FeSiO₂ nanocomposite synthesized through ball milling

The impact of Cu, Ni and Fe₂O₃ on the magnetic behavior and structural properties of FeSiO₂ nanocomposite synthesized through ball milling

Fabrication, Design and Characterization of 1D Nano-Fibrous SiO2 Surface by a Facile and Scalable Method

Onset sintering-coarsening-coalescence kinetics of calcite powders

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Thermally activated sintering–coarsening–coalescence-polymerization of amorphous silica nanoparticles

Cited by 8 publications

References 21 publications

The impact of Cu, Ni and Fe2O3 on the magnetic behavior and structural properties of FeSiO2 nanocomposite synthesized through ball milling

The impact of Cu, Ni and Fe2O3 on the magnetic behavior and structural properties of FeSiO2 nanocomposite synthesized through ball milling

Fabrication, Design and Characterization of 1D Nano-Fibrous SiO2 Surface by a Facile and Scalable Method

Onset sintering-coarsening-coalescence kinetics of calcite powders

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The impact of Cu, Ni and Fe₂O₃ on the magnetic behavior and structural properties of FeSiO₂ nanocomposite synthesized through ball milling

The impact of Cu, Ni and Fe₂O₃ on the magnetic behavior and structural properties of FeSiO₂ nanocomposite synthesized through ball milling