Effect of milling process on particle size, morphology and magnetization in non-stoichiometric Fe2O3-MnO2.

Vera-Serna, P.; Martínez-Sánchez, M. A.; Kusý, Martin; Bolarín-Miró, A.M.; Tenorio, F. N.; Juanico‑Lorán, José

doi:10.15282/jmes.13.1.2019.18.0388

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…Additionally, the synergy impact of dielectric and magnetic losses may be tuned to provide optimum impedance matching. The results of several works showed a correlation between the ball-milling times and various properties such as crystallite and particle size, specific surface area, magnetic properties, and nanoscale porosity of the iron powder [36][37][38]. Yan et al obtained magnetite particles (MPs) using the high-energy ball milling of oxidized nickel slag that possessed strong magnetic properties and hetero-interfaces formed by impurities.…”

Section: Introductionmentioning

confidence: 99%

Structural, Electromagnetic and Microwave Properties of Magnetite Extracted from Mill Scale Waste via Conventional Ball Milling and Mechanical Alloying Techniques

et al. 2021

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This study presents the utilization of mill scale waste, which has attracted much attention due to its high content of magnetite (Fe3O4). This work focuses on the extraction of Fe3O4 from mill scale waste via magnetic separation, and ball milling was used to fabricate a microwave absorber. The extracted magnetic powder was ground-milled using two different techniques: (i) a conventional milling technique (CM) and (ii) mechanical alloying (MM) process. The Fe3O4/CM samples were prepared by a conventional milling process using steel pot ball milling, while the Fe3O4/MM samples were prepared using a high-energy ball milling (HEBM) method. The effect of milling time on the structural, phase composition, and electromagnetic properties were examined using X-ray diffraction (XRD) and a vector network analyzer (VNA). XRD confirmed the formation of magnetite after both the magnetic separation and milling processes. The results revealed that Fe3O4 exhibited excellent microwave absorption properties because of the synergistic characteristics of its dielectric and magnetic loss. The results showed that the Fe3O4/CM particle powder had a greater absorption power (reflection loss: <−10 dB) with 99.9% absorption, a minimum reflection loss of −30.83 dB, and an effective bandwidth of 2.30 GHz for 2 mm thick samples. The results revealed the Fe3O4/MM powders had higher absorption properties, including a higher RL of −20.59 dB and a broader bandwidth of 2.43 GHz at a matching thickness of only 1 mm. The higher microwave absorption performance was attributed to the better impedance matching property caused by the porous microstructure. Furthermore, the magnetite, Fe3O4 showed superior microwave absorption characteristics because of the lower value of permittivity, which resulted in better impedance matching. This study presents a low-cost approach method by reutilizing mill scale waste to fabricate a high purity crystalline Fe3O4 with the best potential for designing magnetic nano-sized based microwave absorbers.

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Section: Introductionmentioning

confidence: 99%

Structural, Electromagnetic and Microwave Properties of Magnetite Extracted from Mill Scale Waste via Conventional Ball Milling and Mechanical Alloying Techniques

et al. 2021

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“…In addition to this, the phases of calcium ferrite like CaFe2O5 and CaFe3O5 are formed before Ca2Fe2O5 [22,23]. Analysis of particle size and morphology of metal oxides have been carried out and found adversly effected by milling process [24].…”

Section: Introductionmentioning

confidence: 99%

Effect of composition on thermal stability and microstructural behaviour of non-prototype material (CaO-Fe2O3)

Pandey¹,

Jatav²,

Pandel³

et al. 2021

JMES

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The role of simulant materials becomes necessary for the predictive study of the nuclear severe accident phenomena due to its similarity with corium (a liquid form of UO2 and steel). Since simulant material is eco-friendly and has similar properties to corium, it has been widely used in the research field of severe accident management. In this study, material CaO-Fe2O3 a non-eutectic binary mixture is considered for characterization purpose to address the thermophysical properties at different compositional ratios. The CaO-Fe2O3 powder mixture was prepared in mortar for 40 minutes manually to form a homogeneous mixture and then cylindrical pellets prepared at five different ratios with the help of the phase diagram. Further, these pellets were heat-treated at 1200°C for three hours soaking time to address its thermal stability in a programmable electric furnace. Finally, pellets ground into powder form manually for further characterization. Initially, the weight loss analysis was reported by measurement of dimensions of pellets before and after heat treatment. The thermal properties, phase analysis, and morphological studies have been carried out through DSC, XRD and FE-SEM in laboratory and results were discussed in the context of the property of ideal simulant materials used for the study of nuclear severe accidents. The melting point of all the samples were found stable (1200°C-1230°C) and values of activation energy and specific heat were well synchronized between with and without heat-treated samples. Dislocation density of samples increases significantly with increasing the proportion value of calcium oxide after heat treatment.

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Effect of Y2O3 addition and milling time on the synthesis of nanocrystalline Ag–ZnO composite powder via mechanical alloying

Biyik

2024

Journal of Radiation Research and Applied Sciences

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Effect of milling process on particle size, morphology and magnetization in non-stoichiometric Fe2O3-MnO2.

Cited by 3 publications

References 18 publications

Structural, Electromagnetic and Microwave Properties of Magnetite Extracted from Mill Scale Waste via Conventional Ball Milling and Mechanical Alloying Techniques

Structural, Electromagnetic and Microwave Properties of Magnetite Extracted from Mill Scale Waste via Conventional Ball Milling and Mechanical Alloying Techniques

Effect of composition on thermal stability and microstructural behaviour of non-prototype material (CaO-Fe2O3)

Effect of Y2O3 addition and milling time on the synthesis of nanocrystalline Ag–ZnO composite powder via mechanical alloying

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