Fe3O4 nanoparticles as additives for gamma-ray shielding: Structural and surface characterization

Nikolić, Violeta N.; Milić, M.; Jovanović, Sonja; Girman, Vladimír

doi:10.5937/str1702020n

Cited by 6 publications

(2 citation statements)

References 24 publications

(25 reference statements)

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“…The mean particle size of about 300 μm was determined, and it was also found that two main sizes dominate (75 and 700 μm). In general, the method of determining the mean particle size of the mixture is complex and not reliable, and it is actual wherever the problem of small particles is present [10,11].…”

Section: Separation Of Different Mixture Granulationsmentioning

confidence: 99%

Influence of the ignition mixture particle size on rocket motor igniter pressure gradient

Gligorijević¹,

Nešić²,

Bogdanov³

et al. 2018

Sci Tech Rev

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The paper discusses the influence of ignition mixture granulation onto the regime of rocket motor ignition. Igniter tests were performed in manometric bomb and pressure distribution was measured. In each test different granulations of the same mixture in powder form were tested. After that, two different ignition mixture compositions in the form of pressed tablets were tested. Total masses of ignition mixtures were equal in all the tests. In the first series of the igniter tests, very carefully chosen different granulation of the powder was used in each test, with the particles in a narrow range. From one to another test, only the granulation of the mixture was changed. The purpose was to determine if there exists an influence of the mixture granulation onto the pressure gradient and thus also onto the regime of the rocket motor ignition. It turned out, surprisingly, that there were no visible differences in the regimes of pressure increase due to the different granulation of the ignition mixtures. In another series of tests the mixture was prepared in the form of pressed tablets, with various sizes from test to test. Two different mixtures were tested, and the mass of each single charge of the igniter was the same as in the first series of tests. It is shown that the form of the pressed tablets, as well as their composition, may considerably affect the mode of rocket motor ignition

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Section: Separation Of Different Mixture Granulationsmentioning

confidence: 99%

Influence of the ignition mixture particle size on rocket motor igniter pressure gradient

Gligorijević¹,

Nešić²,

Bogdanov³

et al. 2018

Sci Tech Rev

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show abstract

“…The optical properties of the samples, absorbance and bandgap energy were obtained from UV-VIS spectroscopy. 400), (511), and (440) corresponding to JCPDS Card No.00-900-2674 [51]. These peaks are demonstrating cubic inverse spinel structure of Fe3O4 which are sharp and intense to be well crystallized structure [52].…”

mentioning

confidence: 92%

Green Synthesis of Fe3O4/TiO2 Nanoparticles Using Extracts of Moringa oleifera: Microstructural and Optical Properties

Tumbelaka

Istiqomah

Mabarroh

et al. 2022

SSP

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Fe3O4 and Fe3O4/TiO2 magnetic nanoparticles have been successfully prepared using an eco-friendly green synthesis method with various Moringa Oleifera (MO) extract concentrations. The X-ray diffraction and transmission electron microscopy results confirmed that the microstructure of Fe3O4 nanoparticles is a cubic inverse spinel structure with an average particle size of 9.2–11.7 nm and lattice parameters is in the range of 8.14–13.60 Å and the MO did not change the morphological structure of Fe3O4. Fourier-transform infrared showed that the samples had magnetic particles vibration peaks at 632 cm-1 and 570 cm-1, 500–700 cm-1 for Ti-O peaks, and 1047 cm-1 for aromatic C-C indicating green synthesis. Furthermore, the results of UV-VIS data presented the absorption edges of Fe3O4, Fe3O4-MO, and Fe3O4/TiO2-MO were 187.9 nm, 198.7 nm, and 197.1 nm, respectively. The bandgap energy of Fe3O4-MO is in the range of 2.62–2.66 eV and the bandgap energy of Fe3O4/TiO2-MO is 2.76 eV which explains that it depends on the bioactive compounds. Based on these results, the green synthesis nanoparticles have the potential to be applied in the industrial sector, especially for photocatalyst applications.

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Observation of low- and high-temperature CuFe2O4 phase at 1100 °C: The influence of Fe3+ ions on CuFe2O4 structural transformation

Nikolić

Milić

2018

Ceramics International

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Fe3O4 nanoparticles as additives for gamma-ray shielding: Structural and surface characterization

Cited by 6 publications

References 24 publications

Influence of the ignition mixture particle size on rocket motor igniter pressure gradient

Influence of the ignition mixture particle size on rocket motor igniter pressure gradient

Green Synthesis of Fe<sub>3</sub>O<sub>4</sub>/TiO<sub>2</sub> Nanoparticles Using Extracts of <i>Moringa oleifera</i>: Microstructural and Optical Properties

Observation of low- and high-temperature CuFe2O4 phase at 1100 °C: The influence of Fe3+ ions on CuFe2O4 structural transformation

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Fe3O4 nanoparticles as additives for gamma-ray shielding: Structural and surface characterization

Cited by 6 publications

References 24 publications

Influence of the ignition mixture particle size on rocket motor igniter pressure gradient

Influence of the ignition mixture particle size on rocket motor igniter pressure gradient

Green Synthesis of Fe<sub>3</sub>O<sub>4</sub>/TiO<sub>2</sub> Nanoparticles Using Extracts of <i>Moringa oleifera</i>: Microstructural and Optical Properties

Observation of low- and high-temperature CuFe2O4 phase at 1100 °C: The influence of Fe3+ ions on CuFe2O4 structural transformation

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Observation of low- and high-temperature CuFe2O4 phase at 1100 °C: The influence of Fe3+ ions on CuFe2O4 structural transformation