Nanostructured Materials with Conducting and Magnetic Properties: Preparation of Magnetite/Conducting Copolymer Hybrid Nanocomposites by Ultrasonic Irradiation

2011 ◽  
Vol 18 (3) ◽  
pp. 259-274 ◽  
Author(s):  
Yuvaraj Haldorai ◽  
Van Hoa Nguyen ◽  
Quang Long Pham ◽  
Jae-Jin Shim
Keyword(s):  
Magnetic Properties ◽  
Nanostructured Materials ◽  
Ultrasonic Irradiation ◽  
Hybrid Nanocomposites

Fabrication of Nanostructured Fe-Co Alloy Powders by Hydrogen Reduction and Its Magnetic Properties

2007 ◽  
Vol 534-536 ◽  
pp. 1389-1392
Author(s):  
Young Jung Lee ◽  
Baek Hee Lee ◽  
Gil Su Kim ◽  
Kyu Hwan Lee ◽  
Young Do Kim
Keyword(s):  
Crystal Structure ◽  
Particle Size ◽  
Grain Size ◽  
Magnetic Properties ◽  
Nanostructured Materials ◽  
Hydrogen Reduction ◽  
Internal Strain ◽  
Oxide Powder ◽  
Powder Mixtures ◽  
Effect Of Microstructure

Magnetic properties of nanostructured materials are affected by the microstructures such as grain size (or particle size), internal strain and crystal structure. Thus, it is necessary to study the synthesis of nanostructured materials to make significant improvements in their magnetic properties. In this study, nanostructured Fe-20at.%Co and Fe-50at.%Co alloy powders were prepared by hydrogen reduction from the two oxide powder mixtures, Fe2O3 and Co3O4. Furthermore, the effect of microstructure on the magnetic properties of hydrogen reduced Fe-Co alloy powders was examined using XRD, SEM, TEM, and VSM.

Synthesis of magnetic Fe3O4 micro/nanospheres in organic solvent

2018 ◽  
Vol 16 (1_suppl) ◽  
pp. 26-31
Author(s):  
Tan Heng ◽  
Wang Ze ◽  
Tan Wen-sheng ◽  
Li Xiao-ping ◽  
Qiu Jian-guo ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Magnetic Properties ◽  
Surface Modification ◽  
Nanostructured Materials ◽  
Nitrogen Atmosphere ◽  
Phase Method ◽  
Organic Media ◽  
Chemical Structures ◽  
Amine Functionalized ◽  
Magnetic Fe3o4

Introduction: Micro/nanostructured materials have attracted a great deal of attention, and many strategies have been developed to fabricate micro/nanostructured materials. Methods: Amine-functionalized micro/nanostructured Fe3O4 with different sizes was synthesized conveniently in organic media. The chemical structures of as-synthesized products were characterized by FTIR, TEM, SEM, and XRD. Results: The ligand binds to the Fe3O4 core by hydrogen bond between the oxygen atom on the surface of Fe3O4 and the hydrogen atom in molecular ethylenediamine. Their magnetic properties were also investigated. Conclusions: First, there is no need to control the reaction under a nitrogen atmosphere, and just one salt is used as an iron source. The growth and the surface modification of Fe3O4 crystalline nucleation happen at the same time. Second, monodispersed Fe3O4 micro/nanospheres were prepared without additional surfactant or external magnetic fields. Third, this method is preferred compared with the conventional organic phase method, as the reaction condition is milder and less pollutant will be produced.

scholarly journals Customized magnetic properties of (Mn0.5Zn0.5)[EuxNdxFe2-2x]O4 nanospinel ferrites synthesized via ultrasonic irradiation approach

2020 ◽  
Vol 19 ◽  
pp. 103350 ◽  
Author(s):  
M.A. Almessiere ◽  
Y. Slimani ◽  
Sagar E. Shirsath ◽  
Y.S. Wudil ◽  
A. Baykal ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Ultrasonic Irradiation

Interweaving spins with their environment: novel inorganic nanohybrids with controllable magnetic properties

2014 ◽  
Vol 43 (11) ◽  
pp. 4220-4232 ◽  
Author(s):  
Christian Cervetti ◽  
Eric Heintze ◽  
Lapo Bogani
Keyword(s):  
Magnetic Properties ◽  
Nanostructured Materials ◽  
Molecular Magnets ◽  
Synthesis And Characterization ◽  
Magnetic Nanohybrids

We discuss the developments in the synthesis and characterization of magnetic nanohybrids made of molecular magnets and nanostructured materials.

ZrO2/PEG hybrid nanocomposites synthesized via sol–gel: Characterization and evaluation of the magnetic properties

2015 ◽  
Vol 413 ◽  
pp. 1-7 ◽  
Author(s):  
Michelina Catauro ◽  
Flavia Bollino ◽  
Ferdinando Papale ◽  
Maria Cristina Mozzati ◽  
Chiara Ferrara ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Sol Gel ◽  
Hybrid Nanocomposites

scholarly journals WEAR PERFORMANCE AND MAGNETIC PROPERTY OF ALUMINUM REINFORCED WITH FE2O3 AND AL2O3 HYBRID NANOCOMPOSITE USING POWDER METALLURGY P/M METHOD

2020 ◽  
Vol 20 (4) ◽  
pp. 322-331
Author(s):  
H. J. M. Alalkawi ◽  
Ghada Adel Aziz ◽  
Hussain A. Aljawad
Keyword(s):  
Wear Resistance ◽  
Magnetic Properties ◽  
Powder Metallurgy ◽  
Wear Rate ◽  
Pure Aluminum ◽  
Aluminum Matrix ◽  
Hybrid Nanocomposites ◽  
Al2o3 Content ◽  
Hysteresis Curve ◽  
Hybrid Nanocomposite

  The current study deals with fabricating a hybrid nanocomposite. Pure aluminum as the base matrix and Fe2O3 and Al2O3. A reinforcements Fe2O3 weight percentage (wt%) is varied (1.5, 2.5 and 5 % wt%) and Al2O3 is held constant (2 wt%). The new designed nanocomposite was produced using Powder Metallurgy (P/M) method. The experimental results revealed that the microstructure images of nanocomposites showed uniformly distributed of Fe2O3 and Al2O3 in aluminum matrix. Dry tribological behavior (wear rate and coefficient of friction) was studied and for varying hybrid reinforcement content. The results observed that the wear resistance of hybrid nanocomposites improved with the increasing of Fe2O3 + Al2O3 reinforced material but the better wear resistance was recorded with the (1.5% Fe2O3 + 2% Al2O3) wt% than the base metal and other nanocomposites. It is evident that the maximum reduction of wear rate and COF were 4.87 × 10-8 g/m and 0.59 respectively for the (1.5% Fe2O3 + 2% Al2O3) nanocomposite. The hysteresis curve of nanocomposites showed that the magnetic properties which indicated that the better response of magnetic properties was found with the nanocomposite of (1.5% Fe2O3 + 2% Al2O3) content.  

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