Relevant bibliographies by topics / Fe Nanopowders / Journal articles
To see the other types of publications on this topic, follow the link: Fe Nanopowders.

Journal articles on the topic 'Fe Nanopowders'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 September 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Fe Nanopowders.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Choi, Chul Jin, and Ji Hun Yu. "Preparation and Sintering Behavior of Fe Nanopowders Produced by Plasma Arc Discharge Process." Materials Science Forum 534-536 (January 2007): 585–88. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.585.

Full text
Abstract:
The nano-sized Fe powders were prepared by plasma arc discharge (PAD) process using pure Fe rod. The microstructure of the prepared nanopowders was evaluated and the effect of hydrogen gas in the chamber atmosphere was investigated. In addition, the sintering behavior of nanosized Fe powders was analyzed and compared with those of conventional micron powders. The prepared Fe nanopowders had nearly spherical shapes and consisted of metallic core and oxide shell structures. In PAD nanopowder sintering, the higher volume shrinkage at low sintering temperature was observed due to the reduction of
APA, Harvard, Vancouver, ISO, and other styles
2

Choi, C. J., J. H. Yu, and Jung Goo Lee. "Characterization and Sintering Behaviors of Fe Based Nanopowders Prepared by Arc Discharge Process." Materials Science Forum 638-642 (January 2010): 1755–59. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.1755.

Full text
Abstract:
The formation of Fe nanopowders by Plasma Arc discharge process and sintering behavior of Fe nanopowder has been investigated. The effect of processing parameters on the size and microstructure and their pressureless sintering behaviors have been analyzed. Also the addition effect of micron powder to nanopowder on the compaction and sintering was studied. The prepared Fe nanpowder showed nearly spherical shape with the average size of 100 nm. The surface oxide layer of nanopowder played an important role on the initial densification of the green compact. The hardness and sintered density of na
APA, Harvard, Vancouver, ISO, and other styles
3

Bardakhanov, Sergey P., Aleksandr M. Volodin, Konstantin V. Zobov, Roman M. Kenzhin, and Vladimir I. Lysenko. "Research on Alumina and Other Nanopowders by Electron Paramagnetic Resonance Method." Siberian Journal of Physics 5, no. 1 (2010): 97–101. http://dx.doi.org/10.54362/1818-7919-2010-5-1-97-101.

Full text
Abstract:
The paper is devoted to experimental study of alumina and other nanopowders by electron paramagnetic resonance method. The experiments have showed the surface donor centers for ZrO2 + MgO (9 % mol.) and Al2O3 samples. The influence of Fe(3+) dirt was determined in glacial Al2O3 liquid melt, but Al2O3 nanopowder was free from this impurity. The Cr(5+) dirt were found in ZrO2 + MgO (9 % mol.) nanopowder sample.
APA, Harvard, Vancouver, ISO, and other styles
4

Chen, Shan-Jun, Yan Chen, Song Li, et al. "Bulk Synthesis of Fe3Al Intermetallic Compound Nanoparticles by Flow-Levitation Method." Nano 10, no. 01 (2015): 1550002. http://dx.doi.org/10.1142/s1793292015500022.

Full text
Abstract:
Metallic nanopowders have an increasing application in magnetic materials, catalysts and chemical and metallic industries. In this research, a novel bulk synthesis method for preparing high pure intermetallic Fe 3 Al nanoparticles was developed by flow-levitation (FL) method. The Fe and Al vapors ascending from the high-temperature levitated droplet were condensed by cryogenic argon gas under atmospheric pressure. X-ray diffraction (XRD) and selected-area electron diffraction (SAED) were used to identify and characterize the prepared nanopowders exhibiting a Fe 3 Al phase. Measurement of trans
APA, Harvard, Vancouver, ISO, and other styles
5

Choi, Chul Jin, Jin Chun Kim, Ji Hun Yu, and Byoung Kee Kim. "Characterization of Fe Based Nanopowders Synthesized by Gas Phase Synthesis." Materials Science Forum 475-479 (January 2005): 3547–50. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.3547.

Full text
Abstract:
Nanosized Fe based powders have been synthesized by both chemical vapor condensation (CVC) and plasma arc discharge (PAD) processes. Fe, Fe-C and Fe-N nanopowders were successfully synthesized. The influence of experimental parameters on microstructures and phase composition of nanopowders was investigated. The prepared powders were nearly spherical in shape and core-shell type in structure. Various kinds of Fe-C and Fe-N composite nanopowders could be synthesized by controlling the carrier gas and precursor decomposition temperature, etc.
APA, Harvard, Vancouver, ISO, and other styles
6

Lysenko, Vladimir. "Different-Oxides Nanoceramics Microhardness." International Journal of Nanoscience 13, no. 04 (2014): 1440003. http://dx.doi.org/10.1142/s0219581x14400031.

Full text
Abstract:
With help of the method of the spark plasma sintering (SPS), the fine-grained (of micron approximately) ceramics based on various alumina nanopowders had created. A comparison of microhardness of ceramic samples obtained from 11 alumina nanopowders and 2 their composites was held. Microhardness of the ceramics obtained both by SPS, and by the traditional method (at successive pressing and sintering) is compared. The dependence of ceramics microhardness on the phase composition of the initial nanopowder and the average size of its particles was investigated. Besides alumina nanopowders ( Al 2 O
APA, Harvard, Vancouver, ISO, and other styles
7

Xu, Jia Huan, Hua Ke, De Chang Jia, Wen Wang, and Yu Zhou. "Preparation of BiFeO3 Nanopowders Using Acetylacetone as Stabilizer." Key Engineering Materials 434-435 (March 2010): 314–17. http://dx.doi.org/10.4028/www.scientific.net/kem.434-435.314.

Full text
Abstract:
The present investigation reports on the preparation of BiFeO3 nanopowders by a sol-gel method using acetylacetone as a stabilizer. Single-phase BiFeO3 nanopowders without any impurity or amorphous phases were obtained when the precursor was thermal treated at temperatures as low as 400 oC for 2 h. Acetylacetone (acac) plays an important role on lowering the formation temperature of pure phase BiFeO3 nanopowders. It is found that Bi/acac molar ratio of 1/30 was favorable for a stable sol and for the lowest crystallization temperature of pure BiFeO3 nanopowders. X-ray diffraction and Fourier tr
APA, Harvard, Vancouver, ISO, and other styles
8

Wu, Jun Hua, Ling Bing Kong, and Young Keun Kim. "Structural and Microwave Properties of Fe-Based Nanopowders via Mechanochemical Synthesis." Solid State Phenomena 124-126 (June 2007): 851–54. http://dx.doi.org/10.4028/www.scientific.net/ssp.124-126.851.

Full text
Abstract:
Structural and microwave properties of Fe-based nanoalloy powders, mechanochemically synthesized with a composition corresponding to Finemet (Fe73.5Si13.5B9Nb3Cu1), were investigated. The nanopowders, dominated by bcc-Fe (Si), consist of nanocrystallites and display high magnetization with low-coercivity. The microwave measurements show that the nanocomposites comprising the nanopowders possess high, broadband magnetic permeability.
APA, Harvard, Vancouver, ISO, and other styles
9

Abdurakhmonov, O. E., M. E. Alisultanov, and E. V. Yurtov. "Chemical synthesis of nanostructured magnetic hardened alloy of the Nd-Fe-B system." Transaction Kola Science Centre 12, no. 2-2021 (2021): 11–13. http://dx.doi.org/10.37614/2307-5252.2021.2.5.001.

Full text
Abstract:
Hard magnetic nanopowders of the Nd15Fe78B7 alloy were synthesized from mixtures of Nd, Fe and Fe-B oxides with CaH2 in a hydrogen atmosphere at 800 °C by a reduction-diffusion process. Nd, Fe, Fe-B oxides were synthesized by chemical deposition. The resulting particles had a granular shape with an average size: Nd2O3 — 50 nm, Fe2O3 — 95 nm, Fe3BO6 — 57 nm. The particle size of the Nd15Fe78B7 alloy was 45–140 nm. It is shown that the proposed method is suitable for obtaining nanopowders of hard magnetic alloys of the Nd-Fe-B system.
APA, Harvard, Vancouver, ISO, and other styles
10

Demirov, A. P., I. V. Blinkov, D. V. Kuznetsov, K. V. Kuskov, E. A. Kolesnikov та A. S. Sedegov. "Production of α-Fe <sub>2</sub>O <sub>3</sub> powder material with multilevel gradient porosity". Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya, № 2 (23 вересня 2021): 49–59. http://dx.doi.org/10.17073/1997-308x-2021-2-49-59.

Full text
Abstract:
The paper studies methods for obtaining a multilevel gradient porous material by the layer-by-layer sintering of distributed α-Fe2O3 nanopowders and submicron powders. Nanopowders with an average particle size of 12 nm were obtained by the coprecipitation method, and submicron powders, which are hollow spheres, were obtained using the spray pyrolysis method. Powders were consolidated by sintering in a muffle furnace, hot pressing, and spark plasma sintering (SPS) at various temperatures, loads, and holding times. It was shown that muffle furnace sintering and hot pressing methods cannot provid
APA, Harvard, Vancouver, ISO, and other styles
11

Wojcieszak, Damian, Michal Mazur, Danuta Kaczmarek, and Jaroslaw Domaradzki. "Influence of doping with Co, Cu, Ce and Fe on structure and photocatalytic activity of TiO2 nanoparticles." Materials Science-Poland 35, no. 4 (2018): 725–32. http://dx.doi.org/10.1515/msp-2017-0117.

Full text
Abstract:
Abstract In this paper, structural and photocatalytic properties of TiO2 nanopowders doped with 1 at.% of cerium, cobalt, cooper and iron have been compared. Nanoparticles were synthesized by sol-gel technique and characterized by SEM, EDS and XRD methods. Moreover, their photocatalytic activity was determined based on decomposition of methyl orange. Results were compared with undoped powder. The structural investigations have revealed that all prepared nanopowders were nanocrystalline and had TiO2-anatase structure. The average size of crystallites was ca. 4 nm to 5 nm. The distribution of th
APA, Harvard, Vancouver, ISO, and other styles
12

Crisan, O., A. D. Crisan, I. Skorvanek, and J. Kovac. "Magnetism and structural phase transformation in Fe / Fe oxide nanopowders." Journal of Physics: Conference Series 144 (January 1, 2009): 012027. http://dx.doi.org/10.1088/1742-6596/144/1/012027.

Full text
APA, Harvard, Vancouver, ISO, and other styles
13

Golovina, Iryna, Bela Shanina, Sergiy Kolesnik, Ilia Geifman, and Alexander Andriiko. "Magnetic defects in KTaO3and KTaO3:Fe nanopowders." physica status solidi (b) 249, no. 11 (2012): 2263–71. http://dx.doi.org/10.1002/pssb.201248157.

Full text
APA, Harvard, Vancouver, ISO, and other styles
14

Foo, Yuan Teng, Li Ting Foo, Ladan Shahcheragh, Bahman Amini Horri, and Babak Salamatinia. "Green Synthesis and Characterization of High-Purity Monodispersed Cupric Oxide (CuO) Nanopowder." Key Engineering Materials 801 (May 2019): 351–56. http://dx.doi.org/10.4028/www.scientific.net/kem.801.351.

Full text
Abstract:
In this study, high quality monodispersed nanocrystalline cupric oxide (CuO) nanopowder was prepared through novel sol-gel green synthesis method, assisted by sodium alginate (Na-ALG) as the green ionic exchange material. The morphology and structural properties of CuO nanopowders synthesized with and without the incorporation of extrusion dripping, at different Na-ALG solution concentrations and calcination temperatures, were studied using thermalgravimetric analysis (TGA), field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDX) and Raman spectroscopy.
APA, Harvard, Vancouver, ISO, and other styles
15

Alymov, M. I., S. G. Vadchenko, E. V. Suvorova, V. A. Zelensky, and A. B. Ankudinov. "Effect of Fe nanopowder sample density on ignition parameters at heating in the air." Доклады Академии наук 488, no. 4 (2019): 386–90. http://dx.doi.org/10.31857/s0869-56524884386-390.

Full text
Abstract:
Ignition of Fe nanopowders of bulk density and its samples compacted to relative density of 0,3-0,5 was studied while they were heated in the air. The ignition temperature of the compacted samples does not depend on the heating rate and comprises 100-115 C. The oxidation process includes the stages of inert heating, ignition, surface and filtration modes of the reaction and afterburning. The time of the active stages, i.e. ignition and filtration mode, depends on the sample density at the same heating terms. It allows one to develop storage methods of Fe nanopowders as compacts.
APA, Harvard, Vancouver, ISO, and other styles
16

Nguyen, Tien Hiep, Y. Konyukhov, Nguyen Van Minh, et al. "Magnetic Properties of Fe, Co and Ni Based Nanopowders Produced by Chemical-Metallurgy Method." Eurasian Chemico-Technological Journal 23, no. 1 (2021): 3. http://dx.doi.org/10.18321/ectj1028.

Full text
Abstract:
This research study describes the magnetic properties of Fe, Co and Ni metallic nanopowders (NPs) and their ternary nanocomposites (NCs), which can be used as fillers in radio-wave absorbing composite materials and coatings, as well as for magnetic protection of banknotes and security paper. The nanopowders were prepared by the chemical metallurgy method. The desired properties of Fe, Co and Ni NPs and NCs were achieved by co-precipitation, the addition of surfactants and changes in reduction temperature and time parameters. Magnetic measurements showed that all samples of pure metal NPs are s
APA, Harvard, Vancouver, ISO, and other styles
17

Wang, Qi, Yun Fa Chen, Min Yang, Xiao Feng Wu та Ya Jun Tian. "Synthesis of Low Agglomerating Spherical α-Fe2O3 Nanopowders". Key Engineering Materials 368-372 (лютий 2008): 1568–69. http://dx.doi.org/10.4028/www.scientific.net/kem.368-372.1568.

Full text
Abstract:
Low agglomerating spherical α-Fe2O3 nanopowders were synthesized by catalytic phase transformation in hydrothermal reaction and then dried through freeze-drying. It was found that the as-synthesized particles were spherical and the particle size results obtained from the different measurement methods, including BET, XRD, TEM, SEM and laser particle size analyzer, were almost the same, implying that the α-Fe2O3 nanopowders were low agglomerating.
APA, Harvard, Vancouver, ISO, and other styles
18

Saadi, H., F. I. H. Rhouma, Z. Benzarti, Z. Bougrioua, S. Guermazi, and K. Khirouni. "Electrical conductivity improvement of Fe doped ZnO nanopowders." Materials Research Bulletin 129 (September 2020): 110884. http://dx.doi.org/10.1016/j.materresbull.2020.110884.

Full text
APA, Harvard, Vancouver, ISO, and other styles
19

Swatsitang, Ekaphan, Sitchai Hunpratub, and Santi Maensiri. "Fe-doped La0.5Sr0.5TiO3 nanopowders prepared by hydrothermal method." Microelectronic Engineering 108 (August 2013): 209–12. http://dx.doi.org/10.1016/j.mee.2013.01.024.

Full text
APA, Harvard, Vancouver, ISO, and other styles
20

Nasiri-Tabrizi, Bahman, and Abbas Fahami. "Mechanochemical Synthesis of Fluorapatite-Zinc Oxide (FAp-ZnO) Composite Nanopowders." ISRN Ceramics 2012 (September 2, 2012): 1–9. http://dx.doi.org/10.5402/2012/754704.

Full text
Abstract:
Fluorapatite-zinc oxide (FAp-ZnO) composite nanopowders were successfully prepared via mechanochemical process. Characterization of the products was carried out by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) analysis, energy dispersive X-ray spectroscopy (EDX), and field-emission scanning electron microscopy (FE-SEM) techniques. Results revealed that in the absence of ZnO which produced by hydrothermal method, the single-phase FAp had high-crystalline structure with appropriate morphological features. Furthermore, after 5 h of milling in the presence of 5 wt.% ZnO,
APA, Harvard, Vancouver, ISO, and other styles
21

Caramitu, Alina Ruxandra, Ioana Ion, Adriana Mariana Bors, et al. "Physico-chemical Characterization of Paint Films with Electromagnetic Properties." Materiale Plastice 59, no. 2 (2022): 9–23. http://dx.doi.org/10.37358/mp.22.2.5580.

Full text
Abstract:
Electromagnetic compatibility issues and those generated by these radiations are a major concern for electrical and electronic products, mainly in the fields of communications, information technology, transportation, security and medical services. The paper presents the way to obtain nanostructured paint/plastic/nanopowder paint systems with electromagnetic shielding properties, as well as their characterization by FTIR analysis, DSC and dielectric tests. These systems have Electro-magnetic Interference (EMI)/Electromagnetic Compatibility (EMC) and Electrostatic Discharge (ESD) applications in
APA, Harvard, Vancouver, ISO, and other styles
22

Choi, Yeon Bin, Jeong Hun Son, and Dong Sik Bae. "Fabrication and Characterization of Cu Doped CeO2 by Hydrothermal Process for Antimicrobial Activity." Defect and Diffusion Forum 391 (February 2019): 114–19. http://dx.doi.org/10.4028/www.scientific.net/ddf.391.114.

Full text
Abstract:
Cu doped CeO2 nanopowder was synthesized by hydrothermal process at 180°C for 2~10h. The average size and distribution of the synthesized Cu doped CeO2 nanopowder was controlled by reaction times. The crystallinity of the synthesized Cu doped CeO2 nanoparticles was investigated by X-ray diffraction (XRD). The morphology of the synthesized Cu doped CeO2 nanoparticles was observed by FE-SEM. The specific surface area of the synthesized Cu doped CeO2 nanoparticles was measured by BET. The crystal size of the synthesized Cu doped CeO2 nanoparticles decreased with decreasing reaction times. The ave
APA, Harvard, Vancouver, ISO, and other styles
23

Surgutskaya, N. S., P. S. Postnikov, Alexandra G. Pershina, A. I. Galanov, Marina E. Trusova, and Alexey E. Sazonov. "The Fe-Core/Carbon-Shell Ultrafine Nanopowders as Platform for Biomolecules Grafting." Advanced Materials Research 1040 (September 2014): 194–98. http://dx.doi.org/10.4028/www.scientific.net/amr.1040.194.

Full text
Abstract:
The Fe-core/carbon-shell nanopowders are excellent platform for covalent grafting of biomolecules. The large-scale synthesis of Fe-core/carbon-shell nanoparticles via electropulse erosion of metal precursors in hydrocarbons was developed. The green fluorescent protein was covalently attached to the powder surface via diazonium functionalization and further carbodiimide activation.
APA, Harvard, Vancouver, ISO, and other styles
24

Matias, Maria Leonor, Ana Pimentel, Ana S. Reis-Machado, et al. "Enhanced Fe-TiO2 Solar Photocatalysts on Porous Platforms for Water Purification." Nanomaterials 12, no. 6 (2022): 1005. http://dx.doi.org/10.3390/nano12061005.

Full text
Abstract:
In this study, polyethylene glycol-modified titanium dioxide (PEG-modified TiO2) nanopowders were prepared using a fast solvothermal method under microwave irradiation, and without any further calcination processes. These nanopowders were further impregnated on porous polymeric platforms by drop-casting. The effect of adding iron with different molar ratios (1, 2, and 5%) of iron precursor was investigated. The characterization of the produced materials was carried out by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectro
APA, Harvard, Vancouver, ISO, and other styles
25

Park, Gi Dae, Jeong Hoo Hong, Dae Soo Jung, Jong-Heun Lee, and Yun Chan Kang. "Unique structured microspheres with multishells comprising graphitic carbon-coated Fe3O4 hollow nanopowders as anode materials for high-performance Li-ion batteries." Journal of Materials Chemistry A 7, no. 26 (2019): 15766–73. http://dx.doi.org/10.1039/c9ta04235k.

Full text
Abstract:
Unique structured microspheres with multishells comprising graphitic carbon-coated Fe<sub>3</sub>O<sub>4</sub> hollow nanopowders are successfully synthesized as an efficient anode material for lithium-ion batteries
APA, Harvard, Vancouver, ISO, and other styles
26

Pustovalov, Alexey V., and Sergey P. Zhuravkov. "Production of Iron Nanopowders by the Electric Explosion of Wire." Advanced Materials Research 1097 (April 2015): 3–7. http://dx.doi.org/10.4028/www.scientific.net/amr.1097.3.

Full text
Abstract:
The work presents the study of the properties of nanopowders produced bythe electric explosion of wire (EEW) in the atmosphere of Ar, CO, CO2, N2. It was established that with the increase of theelectric strength of a gas the wire acquires more energy, enabling the reduction of a particle average size. The EEW in gaseous media that have high dissociation energy (N2 and CO) produces metal powders that consist of crystalline α-Fe и γ-Fe. EEW products obtained in СО2 consist of α-Fe and bivalent iron oxide.
APA, Harvard, Vancouver, ISO, and other styles
27

Goldberg, Margarita A., Marat R. Gafurov, Fadis F. Murzakhanov, et al. "Mesoporous Iron(III)-Doped Hydroxyapatite Nanopowders Obtained via Iron Oxalate." Nanomaterials 11, no. 3 (2021): 811. http://dx.doi.org/10.3390/nano11030811.

Full text
Abstract:
Mesoporous hydroxyapatite (HA) and iron(III)-doped HA (Fe-HA) are attractive materials for biomedical, catalytic, and environmental applications. In the present study, the nanopowders of HA and Fe-HA with a specific surface area up to 194.5 m2/g were synthesized by a simple precipitation route using iron oxalate as a source of Fe3+ cations. The influence of Fe3+ amount on the phase composition, powders morphology, Brunauer–Emmett–Teller (BET) specific surface area (S), and pore size distribution were investigated, as well as electron paramagnetic resonance and Mössbauer spectroscopy analysis w
APA, Harvard, Vancouver, ISO, and other styles
28

Meyer, M., and L. C. Damonte. "Study of Co and Fe-doped ZnO milled nanopowders." Powder Technology 286 (December 2015): 371–77. http://dx.doi.org/10.1016/j.powtec.2015.07.006.

Full text
APA, Harvard, Vancouver, ISO, and other styles
29

Elsiti, Nagwa Mejid, and M. Y. Noordin. "Experimental Investigations into the Effect of Process Parameters and Nano-Powder (Fe2O3) on Material Removal Rate during Micro-EDM of Co-Cr-Mo." Key Engineering Materials 740 (June 2017): 125–32. http://dx.doi.org/10.4028/www.scientific.net/kem.740.125.

Full text
Abstract:
Cobalt-base alloys are normally applied to materials that require wear, corrosion, and heat resistance. Today, the alloy of cobalt–chromium–molybdenum (Co–Cr–Mo) is employed in aerospace and medical fields. Through the thermal erosion process of Electrical Discharge Machining (EDM), an electrically-produced spark vaporizes materials that are electrically conductive. This paper examines the viability of improvement of material removal rate in the micro-electric discharge machining of cobalt chromium molybdenum (Co-Cr-Mo) using Fe2O3 nanopowder-mixed dielectric fluid. For the purpose of this res
APA, Harvard, Vancouver, ISO, and other styles
30

Wang, Meng, and Ting Wang. "Structural, Magnetic and Optical Properties of Gd and Co Co-Doped YFeO3 Nanopowders." Materials 12, no. 15 (2019): 2423. http://dx.doi.org/10.3390/ma12152423.

Full text
Abstract:
YFeO3, YFe0.95Co0.05O3, Y0.95Gd0.05FeO3 and Y1−xGdxFe0.95Co0.05O3 (x = 0.0, 0.05, 0.10, 0.15 and 0.20) nanopowders were successfully fabricated via a low-temperature solid-state reaction technique. Results obtained using X-ray diffraction (XRD), scanning electron microscopy (SEM), and Raman spectra indicate that YFeO3 nanopowders with Gd3+ and Co3+ ions co-doping at Y and Fe-sites were fabricated at 800 °C in sizes below 50 nm, and a distorted structure was obtained. Magnetic hysteresis loop analyses illustrate that ferromagnetic behavior of YFeO3 nanopowders can be enhanced with the addition
APA, Harvard, Vancouver, ISO, and other styles
31

Song, Min-Kyeong, Mi-Yeon Lee, Jun-Ho Seo, Min-Ho Kim, and Shi-Young Yang. "Synthesis of High Crystalline Al-Doped ZnO Nanopowders from Al2O3and ZnO by Radio-Frequency Thermal Plasma." Journal of Nanomaterials 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/151532.

Full text
Abstract:
High crystalline Al-doped ZnO (AZO) nanopowders were prepared by in-flight treatment of ZnO and Al2O3in Radio-Frequency (RF) thermal plasma. Micron-sized (~1 μm) ZnO and Al2O3powders were mixed at Al/Zn ratios of 3.3 and 6.7 at.% and then injected into the RF thermal plasma torch along the centerline at a feeding rate of 6.6 g/min. The RF thermal plasma torch system was operated at the plate power level of ~140 kVA to evaporate the mixture oxides and the resultant vapor species were condensed into solid particles by the high flow rate of quenching gas (~7000 slpm). The FE-SEM images of the as-
APA, Harvard, Vancouver, ISO, and other styles
32

Deganello, Francesca, Maria Luisa Testa, Valeria La Parola, Alessandro Longo, and Ana C. Tavares. "LaFeO3-based nanopowders prepared by a soft–hard templating approach: the effect of silica texture." J. Mater. Chem. A 2, no. 22 (2014): 8438–47. http://dx.doi.org/10.1039/c3ta15382g.

Full text
Abstract:
Amorphous, HMS and SBA-15 silicas were used to prepare LaFeO<sub>3</sub>-based perovskite nanopowders with high surface area and porosity by a combined soft–hard templating (SHT) approach. Amorphous La and Fe silicates play an important role in the templating process.
APA, Harvard, Vancouver, ISO, and other styles
33

Alvarez, G., and H. Montiel. "Microwave absorption dynamics in Fe3O4nanopowders around Verwey transition." Journal of Physics: Conference Series 2307, no. 1 (2022): 012040. http://dx.doi.org/10.1088/1742-6596/2307/1/012040.

Full text
Abstract:
Abstract In Fe3O4 nanopowders were carried out microwave absorption measurements at X-band (8.8-9.8 GHz), in the 89-300 K temperature range, by means of the ferromagnetic resonance (FMR), the magnetically modulated microwave absorption spectroscopy (MAMMAS) and the low-field microwave absorption (LFMA). The Verwey transition around Tv ∼ 137 K has been detected employed the FMR parameters: the resonant field (Hres ) and the linewidth (ΔHpp ), as temperature function. MAMMAS response shows features that can also be associated with Verwey transition. Finally, LFMA spectra are associated with a ma
APA, Harvard, Vancouver, ISO, and other styles
34

Mystrioti, Christiana, Nymphodora Papassiopi, and Anthimos Xenidis. "Synthesis of Iron Nanomaterials for Environmental Applications from Hydrometallurgical Liquors." Minerals 12, no. 5 (2022): 556. http://dx.doi.org/10.3390/min12050556.

Full text
Abstract:
Hydrometallurgical leaching solutions are often rich in iron, which was traditionally considered a major impurity. However, iron can be selectively separated and recovered by applying appropriate solvent extraction and stripping techniques, and the resulting solutions can be valorized for the synthesis of high-added-value products, such as magnetic iron oxide nanoparticles (mIONPs). The aim of this study was to synthesize high-quality mIONPs from solutions simulating the composition of two alternative stripping processes. The precursor solutions consisted of Fe(II) in an acidic sulfate environ
APA, Harvard, Vancouver, ISO, and other styles
35

Kolesnikova, I. G., B. M. Freidin, Yu V. Kuz’mich, and V. I. Serba. "Properties of Fe-Co alloy nanopowders formed under various conditions." Russian Metallurgy (Metally) 2009, no. 4 (2009): 357–59. http://dx.doi.org/10.1134/s0036029509040132.

Full text
APA, Harvard, Vancouver, ISO, and other styles
36

Komlev, A. A., and V. V. Gusarov. "Glycine-nitrate combustion synthesis of nonstoichiometric Mg-Fe spinel nanopowders." Inorganic Materials 50, no. 12 (2014): 1247–51. http://dx.doi.org/10.1134/s0020168514120103.

Full text
APA, Harvard, Vancouver, ISO, and other styles
37

Sreenivasulu, B., S. Venkatramana Reddy, and P. Swapna. "Synthesis and properties of (Fe, Ni)-doped zinc sulfide nanopowders." Journal of Materials Science: Materials in Electronics 31, no. 19 (2020): 16150–59. http://dx.doi.org/10.1007/s10854-020-03796-8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Swapna, Peyyala, and Sakirevupalli Venkatramana Reddy. "Structural, Optical & Magnetic Properties of (Fe, Al) Co-Doped Zinc Oxide Nanoparticles." Nanoscale Reports 2, no. 1 (2019): 3–16. http://dx.doi.org/10.26524/nr1912.

Full text
Abstract:
Pure and (Fe, Al) co-doped ZnO nanopowders are prepared via co-precipitation method constructively with PEG as capping agent at room temperature (RT). We kept the aluminum concentration as constant at 5 mol% by altering the iron concentration from one to three mol%. After the finishing point of synthesis, the powders are cautiously subjected to various characterizations for instance XRD, Raman, SEM through EDS, TEM, PL, UV-Vis-NIR and VSM, to analyze the properties of structural, morphological, optical and magnetic. XRD analysis reveals, all the nanopowder samples acquire hexagonal wurtzite st
APA, Harvard, Vancouver, ISO, and other styles
39

Sun, Zhan Xing, Ming Hao Fang, De Hua Chen, Li Xian Wei, Yan Gai Liu, and Zhao Hui Huang. "Synthesis of YIG Nanopowders by Sol-Gel Method." Key Engineering Materials 368-372 (February 2008): 582–84. http://dx.doi.org/10.4028/www.scientific.net/kem.368-372.582.

Full text
Abstract:
Yttrium iron garnet (YIG) nanopowders were synthesized by sol-gel method using Fe(NO3)3·9H2O, Y(NO3)3·6H2O as raw materials. The influence of heat treatment, the citric acid to metal nitrates molar ratio (CA / MN) and PH value on the synthesized powders were investigated using scanning electron microscopy (SEM), thermal analyses (DTA/TGA) and X-ray diffraction (XRD). YIG powders with average grain size of 80~90nm were synthesized after calcining at 1000°C for 4h.
APA, Harvard, Vancouver, ISO, and other styles
40

Baldokhin, Yuriy V., Yuriy D. Perfiliev, and Leonid A. Kulikov. "Size effects in ultrafine iron. New structures: 2D - 3D." Nexo Revista Científica 34, no. 01 (2021): 13–23. http://dx.doi.org/10.5377/nexo.v34i01.11282.

Full text
Abstract:
This article is devoted to the analysis of the size of iron nanoparticles impact on the structure, to comparison of the results obtained for the nanopowders in the various authors’ researches. The article considers factors that may impact on the form and parameters of the Mössbauer spectra of iron nanopowders obtained by the inert gas condensation technique (Gen-Miller’s method). Possible causes of the new state of the iron are proved with the effective magnetic field at the 57 Fe nucleus (H=365 kOe). But the results related to size effects differ from the researches of other authors. It was r
APA, Harvard, Vancouver, ISO, and other styles
41

Ciobanu, Mariana, Claudiu Nicolicescu, Simona Bejan, Gabriel Batin, and Ionel Mercioniu. "Studies Concerning the Microhardness of Sintered Carbon Steels Obtained from Fe and Fe3C Nanopowders." Materials Science Forum 672 (January 2011): 223–28. http://dx.doi.org/10.4028/www.scientific.net/msf.672.223.

Full text
Abstract:
Replacing the graphite with carbides in the mixture with Fe powder may be an alternative technological process, by the fact that as carbides decompose when heated, the carbon is set free and diffuses into the Fe network ensuring chemical and structural homogeneity corresponding to sintered steels. Using cementite nanopowder mix with Fe powder is to ensure a better compaction by pressing, less time to decompose and C diffusion into the Fe network in a remarkably chemical homogeneity. The obtaining procedure for Fe3C consists in direct carburation of Fe powder in a special chamber.
APA, Harvard, Vancouver, ISO, and other styles
42

Otterstein, E., R. Nicula, J. Bednarčík, M. Stir та E. Burkel. "In Situ Time-Resolved X-Ray Diffraction Investigation of the ω→ψ Transition in Al-Cu-Fe Quasicrystal-Forming Alloys". Materials Science Forum 558-559 (жовтень 2007): 943–47. http://dx.doi.org/10.4028/www.scientific.net/msf.558-559.943.

Full text
Abstract:
Quasicrystals are aperiodic long-range ordered solids with a high potential for many modern applications. Interest is nowadays paid to the development of economically viable large-scale synthesis procedures of quasicrystalline materials involving solid-state transformations. The kinetics of the high-temperature phase transition from the complex ω-phase to the icosahedral quasicrystalline (iQC) ψ-phase in AlCuFe nanopowders was here examined by in-situ time-resolved X-ray diffraction experiments using synchrotron radiation. In-situ XRD experiments will allow insight on the influence of uniaxial
APA, Harvard, Vancouver, ISO, and other styles
43

Ren, Bai Xiang, and Hong Hui Teng. "Preparation and Photocatalytic Activity of Fe-Doped TiO2 Nanopowders." Materials Science Forum 610-613 (January 2009): 248–52. http://dx.doi.org/10.4028/www.scientific.net/msf.610-613.248.

Full text
Abstract:
(0-2%) Fe-doped TiO2 nanopowders were prepared by sol-gel method. The Size, structure, appearance, the light absorption and hydroscopicity properties were characterized by XRD, TEM, UV-Vis and FTIR. The photocatalytic degradation of crystal violet under UV over catalyst was used as a probe reaction to evaluate their photocatalytic activity, the dependence of photocatalytic properties on Fe doping content and roasting temperature were also discussed. The results show that the process of phase transfer of TiO2 from anatase to rutile was promoted by doping Fe, 1.5% Fe3+-doped TiO2 nanoparticles f
APA, Harvard, Vancouver, ISO, and other styles
44

Salazar-Aguilar, Alma D., Gonzalo Vega, Jose A. Casas, et al. "Direct Hydroxylation of Phenol to Dihydroxybenzenes by H2O2 and Fe-based Metal-Organic Framework Catalyst at Room Temperature." Catalysts 10, no. 2 (2020): 172. http://dx.doi.org/10.3390/catal10020172.

Full text
Abstract:
A semi-crystalline iron-based metal-organic framework (MOF), in particular Fe-BTC, that contained 20 wt.% Fe, was sustainably synthesized at room temperature and extensively characterized. Fe-BTC nanopowders could be used as an efficient heterogeneous catalyst for the synthesis of dihydroxybenzenes (DHBZ), from phenol with hydrogen peroxide (H2O2), as oxidant under organic solvent-free conditions. The influence of the reaction temperature, H2O2 concentration and catalyst dose were studied in the hydroxylation performance of phenol and MOF stability. Fe-BTC was active and stable (with negligibl
APA, Harvard, Vancouver, ISO, and other styles
45

Lin, Fangting, Wangzhou Shi, and Aiyun Liu. "Optical bandgap modulation and magnetic characterization of Fe-doped CuCrO2 nanopowders." Journal of Alloys and Compounds 529 (July 2012): 21–24. http://dx.doi.org/10.1016/j.jallcom.2012.03.059.

Full text
APA, Harvard, Vancouver, ISO, and other styles
46

Candra Seta, Putra Dewangga, Pelangi Eka Yunita, Malik Anjelh Baqiya, and Darminto. "Structural and Magnetic Characterization of Mn and Fe–doped ZnO Nanopowders." IOP Conference Series: Materials Science and Engineering 196 (May 2017): 012018. http://dx.doi.org/10.1088/1757-899x/196/1/012018.

Full text
APA, Harvard, Vancouver, ISO, and other styles
47

RAGHAVENDER, A. T. "STRUCTURAL PROPERTIES OF NANOCRYSTALLINE Ni–Al SPINEL FERRITES." International Journal of Modern Physics B 25, no. 08 (2011): 1121–25. http://dx.doi.org/10.1142/s0217979211058353.

Full text
Abstract:
Ultra fine NiAl x Fe 2-x O 4(0 ≤ x ≤ 1) nanopowders were synthesized by sol-gel method and their structural properties were investigated using X-ray diffractometer (XRD) and fourier transform infrared (FTIR) spectrometer. The particle size D, lattice constant a, density dx decreased with increasing non-magnetic Al content x. The combustion reaction mechanisms were explained with the help of FTIR analysis.
APA, Harvard, Vancouver, ISO, and other styles
48

Oganisian, Karen, Agnieszka Hreniak, Andrzej Sikora, Dominika Gaworska-Koniarek, and Agnieszka Iwan. "Synthesis of iron doped titanium dioxide by sol-gel method for magnetic applications." Processing and Application of Ceramics 9, no. 1 (2015): 43–51. http://dx.doi.org/10.2298/pac1501043o.

Full text
Abstract:
In this paper magnetic properties of six TiO2 powders doped with 1, 5 and 10mol% Fe and prepared by sol-gel method in two different ways were analysed. The size of the obtained TiO2:Fe particles was in the range 200-350 nm as it was confirmed by SEM and AFM techniques. The magnetization of nanopowders was measured as a function of temperature (1.8-300K) and applied magnetic field. The samples with low Fe content manifest superparamagnetic dependence of magnetization. Whereas, the other compounds exhibit the paramagnetic behaviour with the negative Curie temperature, that suggests the antiferro
APA, Harvard, Vancouver, ISO, and other styles
49

Uhm, Young Rang, Byung Sun Han, Chang Kyu Rhee, and Sun Ju Choi. "Photocatalytic Characterization of Fe- and Cu-Doped ZnO Nanorods Synthesized by Cohydrolysis." Journal of Nanomaterials 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/958586.

Full text
Abstract:
Fe- and Cu-doped ZnO nanorods have been synthesized by a novel process employing a hydrolysis of metal powders. Zn, Fe, and Cu nanopowders were used as starting materials and incorporated into distilled water. The solution was refluxed at 60°C for 24 h to obtain the precipitates from the hydrolysis of Zn and dopants (Cu and Fe). The TEM results for ZnO with and without metal doping showed that the produced powders had a rod-like shape. The rod shape was attributable to the zinc oxide from the hydrolysis of Zn. With an increasing doping content, the UV-vis spectra were shifted to a long wavelen
APA, Harvard, Vancouver, ISO, and other styles
50

Nokhrin, Aleksey V., Nataliya V. Malekhonova, Vladimir N. Chuvil’deev, et al. "Effect of High-Energy Ball Milling Time on the Density and Mechanical Properties of W-7%Ni-3%Fe Alloy." Metals 13, no. 8 (2023): 1432. http://dx.doi.org/10.3390/met13081432.

Full text
Abstract:
The present work was aimed at the investigation of the effect of high-energy ball milling (HEBM) time on the sintering kinetics, structure, and properties of the heavy tungsten alloy (HTA) W-7%Ni-3%Fe. The HTA samples were obtained from nanopowders (20–80 nm) using conventional liquid-phase sintering (LPS) in hydrogen and using spark plasma sintering (SPS) in vacuum. The HTA density was shown to depend non-monotonously on the HEBM time that originates from the formation of nonequilibrium solid solutions in the W-Ni-Fe systems during HEBM. The SPS kinetics of the HTA nanopowders was shown to ha
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography