Conditions of formation, structure, and magnetic properties of finely divided iron produced in the presence of ÉD-20 epoxide oligomer and oleic acid

1983 ◽  
Vol 22 (2) ◽  
pp. 84-89
Author(s):  
T. N. Amelichkina ◽  
E. P. Zhelibo ◽  
V. V. Myalkovskii ◽  
T. M. Shvets
Keyword(s):  
Magnetic Properties ◽  
Oleic Acid ◽  
Epoxide Oligomer

scholarly journals LOW-TEMPERATURE SYNTHESIS OF SUPERPARAMAGNETIC Zn0.8Ni0.2Fe2O4 FERRITE NANOPARTICLES

2018 ◽  
Vol 56 (1) ◽  
pp. 31
Author(s):  
Luong Thi Quynh Anh ◽  
Nguyen Van Dan ◽  
Do Minh Nghiep
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
Oleic Acid ◽  
Low Temperature ◽  
Coercive Force ◽  
Saturation Magnetization ◽  
Ferrite Nanoparticles ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Co Precipitation

The crystalline nanoparticles of Ni0.2Zn0.8Fe2O4 ferrite were synthesized by chemical co-precipitation with precursor concentration of 0.1M, then modified by 0.25M solution of oleic acid in pentanol, finally heated at temperatures 120, 140, 160 and 180oC for 6h in autoclave. The XRD, EDS and TEM confirmed that all of samples are crystalline and their particle size are 6, 6.5, 7 and 8 nm. The magnetic properties showed that the coercive force, the remanence of samples are about zero, the saturation magnetization Ms has values from 14.20 to 27.12 emu/g.

scholarly journals Manipulating the morphology of the nano oxide domain in AuCu–iron oxide dumbbell-like nanocomposites as a tool to modify magnetic properties

RSC Advances ◽  
2018 ◽  
Vol 8 (40) ◽  
pp. 22411-22421
Author(s):  
Sharif Najafishirtari ◽  
Aidin Lak ◽  
Clara Guglieri ◽  
Sergio Marras ◽  
Rosaria Brescia ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Oleic Acid ◽  
Iron Oxide ◽  
Nano Oxide ◽  
Structural And Magnetic Properties

We highlighted the effects of oleic acid on the structural and magnetic properties of colloidal nanodumbbells.

Influence of citric acid and oleic acid coating on the dc magnetic properties of Fe3O4 magnetic nanoparticles

2020 ◽  
Vol 20 ◽  
pp. 21-24 ◽  
Author(s):  
M. Polichetti ◽  
M. Modestino ◽  
A. Galluzzi ◽  
S. Pace ◽  
M. Iuliano ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Oleic Acid ◽  
Magnetic Nanoparticles ◽  
Citric Acid ◽  
Fe3o4 Magnetic Nanoparticles ◽  
Acid Coating

Influence of HLB Parameters of Surfactants on Properties of Magneto-Rheological Fluid

2010 ◽  
Vol 97-101 ◽  
pp. 843-847 ◽  
Author(s):  
Cheng Bin Du ◽  
Wei Qing Chen ◽  
Fa Xue Wan
Keyword(s):  
Magnetic Properties ◽  
Oleic Acid ◽  
Polyethylene Glycol ◽  
Rheological Properties ◽  
Magnetic Particles ◽  
Hydrophilic Lipophilic Balance ◽  
The Stability ◽  
Magneto Rheological

The hydrophilic-lipophilic balance (HLB) parameters of surfactants have a significant effect on properties of surfactants and determine the effects of surfactants. The magneto-rheological fluid (MRF) is prepared by using the two typical HLB parameters of surfactants including Polyethylene Glycol and oleic acid in order to improve the property of MRF. Polyethylene Glycol (PEG) whose HLB parameter is 20 has strong hydrophilic. Oleic acid whose HLB parameter is 1 has strong lipophilic. The results indicate that magnetic properties of magnetic particles and rheological properties of MRF can hardly be changed by adding surfactants. The sedimentary stability of MRF adding lipophilic surfactants is superior to that of MRF adding hydrophilic surfactants, and the stability of MRF adding two surfactants increases significantly.

Effect of Milling in Various Media and Annealing on the Structure and Magnetic Properties of Strontium Hexaferrite Powder

2012 ◽  
Vol 190 ◽  
pp. 183-187 ◽  
Author(s):  
S.V. Ketov ◽  
E.A. Lopatina ◽  
T.A. Bulatov ◽  
Yu.D. Yagodkin ◽  
V.P. Menushenkov
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
Oleic Acid ◽  
Milling Time ◽  
Strontium Hexaferrite ◽  
Powder Particle Size ◽  
Nanocrystalline State ◽  
Abrupt Decrease ◽  
Phase Type ◽  
Crystallite Sizes

In the present work, the structure and magnetic properties of strontium hexaferrite powder during milling in various media and subsequent annealing were studied. The milling of the powder leads to an abrupt decrease in the powder particle size and the average crystallite sizes as well as an increase in lattice microstrains of the SrFe12O19 phase. During milling in toluene, no changes in the phase composition were observed, whereas, during milling in water, the Fe2O3 phase (type H1.1) is formed. In the powder milled in oleic-acid-containing toluene a small quantity of α-Fe was found. After milling, the saturation magnetization and remanence decrease; at the same time, the coercive force of the powder milled in toluene is unchanged with increasing milling time, but slightly increases after milling in water and in oleic-acid-containing toluene. The annealing allowed us to increase the magnetic properties of the powder. It is conditioned by formation of nanocrystalline state. Moreover, the magnetic properties values depend on the medium and time of milling. The annealed powders are characterized by the following magnetic properties: μ0Нci = 0.42 ÷ 0.49 T, Br = 0.23 ÷ 0.24 T, (BH)max = 8-9.6 kJ/m3.

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