Structural and Magnetic Properties of Sintered Materials on the Basis of Zinc Oxide

2013 ◽  
Vol 200 ◽  
pp. 261-266
Author(s):  
Igor Virt ◽  
Igor Rudyi ◽  
Ivan Kurilo ◽  
Ivan Lopatynskyi ◽  
Marian Frugynskyi ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Magnetic Properties ◽  
Theoretical Models ◽  
Structural And Magnetic Properties ◽  
Faraday Method ◽  
The Magnetic Field ◽  
Sintered Materials ◽  
Scanning Electron

Structural and magnetic properties of ceramics Zn1-xCoxO and Zn1-xCrxO are studied. Average sizes of grains are determined by scanning electron microscopy. The magnetic field dependences of magnetic susceptibility are investigated by Faraday method. The relevant theoretical models are chosen.

scholarly journals The effect of perpendicularly oriented magnetic field on the formation of very disperse iron structures

2006 ◽  
Vol 71 (10) ◽  
pp. 1083-1089 ◽  
Author(s):  
Nebojsa Nikolic
Keyword(s):  
Magnetic Field ◽  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Magnetic Properties ◽  
Applied Magnetic Field ◽  
Iron Deposit ◽  
Iron Deposits ◽  
Branched Structure ◽  
The Magnetic Field ◽  
Scanning Electron

Iron deposits obtained without and with a perpendicularly oriented magnetic field were examined by scanning electron microscopy (SEM). It was found that the iron deposit obtained under a perpendicularly oriented magnetic field had a more highly branched structure than the iron deposit obtained without an applied magnetic field. Comparing the morphologies of these deposits with those of copper deposits, the branching of the iron deposits can essentially be ascribed to the effect of the magnetic field on the magnetic properties of iron. .

scholarly journals Some aspects of nickel electrodeposition in the presence of a magnetic field

2005 ◽  
Vol 70 (10) ◽  
pp. 1213-1217 ◽  
Author(s):  
Nebojsa Nikolic
Keyword(s):  
Magnetic Field ◽  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Magnetic Properties ◽  
Dendritic Structure ◽  
Nickel Deposit ◽  
Nickel Electrodeposition ◽  
Nickel Deposits ◽  
Scanning Electron

Nickel deposits obtained from a Watt solution both without and with a perpendicularly oriented magnetic field were examined by scanning electron microscopy (SEM). The nickel deposit obtained without an imposed magnetic field was very rough, with a clearly visible clustered structure. The nickel deposit obtained under a perpendicularly oriented magnetic field has a very developed dendritic structure, which can be denoted as arboreous ? bead dendritic structure. The ob- served difference is essentially ascribed to the effect of a magnetic field on the magnetic properties of nickel.

scholarly journals The effects of a magnetic field on the morphologies of nickel and copper deposits: The concept of "effective overpotential"

2007 ◽  
Vol 72 (8-9) ◽  
pp. 787-797 ◽  
Author(s):  
Nebojsa Nikolic
Keyword(s):  
Magnetic Field ◽  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Magnetic Fields ◽  
Applied Magnetic Field ◽  
Electrode Surface ◽  
Copper Deposits ◽  
Perpendicular Orientation ◽  
The Magnetic Field ◽  
Scanning Electron

The morphologies of nickel and copper deposits obtained without applied magnetic fields, and with both parallel and perpendicular applied magnetic fields were examined by the scanning electron microscopy (SEM) technique. Changes in the morphologies of the metals caused by the effect of the magnetic fields are explained by the concept of "effective overpotential". The morphologies of the nickel and copper deposits obtained under parallel oriented magnetic fields were similar to those obtained at some lower cathodic potentials without an applied magnetic field. The magnetic field with a perpendicular orientation to the electrode surface increased the dispersity of the nickel and copper deposits. Nickel and copper deposits obtained under this orientation of the magnetic field were similar to those obtained at some higher cathodic potentials without an applied magnetic field. .

scholarly journals Fabrication and magnetic properties of hierarchical nickel microwires with nanothorns

2010 ◽  
Vol 8 (2) ◽  
pp. 434-439 ◽  
Author(s):  
Junhao Zhang ◽  
Ling Yang ◽  
Xiaofang Cheng ◽  
Jinmeng Zhang ◽  
Fucai Li
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Magnetic Properties ◽  
Room Temperature ◽  
Cooperative Effect ◽  
Magnetic Interactions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

AbstractHierarchical nickel microwires with nanothorns were fabricated through a reduction of nickelous salt with hydrazine in diethanolamine. The product was characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDS). The growth mechanism of the nickel microwires with nanothorns is proposed, based on the evolution of the structures and morphologies, which could be ascribed to the cooperative effect of the complexant of diethanolamine and inherent magnetic interactions. Magnetic properties of the product were measured at room temperature and compared with other shaped counterparts.

Urethane Magnetorheological Elastomers - Manufacturing, Microstructure and Properties

2009 ◽  
Vol 154 ◽  
pp. 107-112 ◽  
Author(s):  
Anna Boczkowska ◽  
Stefan F. Awietjan
Keyword(s):  
Magnetic Field ◽  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Vibrating Sample Magnetometer ◽  
Iron Particles ◽  
Magnetorheological Elastomers ◽  
Microstructure And Properties ◽  
Ferromagnetic Particles ◽  
Scanning Electron

In this paper studies on urethane magnetorheological elastomers (MREs) microstructure in respect to their magnetic and mechanical properties are reported. MREs were obtained from a mixture of polyurethane gel and carbonyl-iron particles cured in a magnetic field of 100 and 300 mT. The amount of particles was varied from 1.5 to 33 vol. %. Samples with different arrangements of particles were produced. Effect of the amount of ferromagnetic particles and their arrangement on microstructure and properties in relation to the external magnetic field was investigated. The microstructure was studied using scanning electron microscopy. Magnetic properties were measured using vibrating sample magnetometer. Rheological and mechanical properties under compression were also examined.

Effects of Plate Magnetic Field on Iron-Rich Phase of Al-20Si-10Fe Alloy during Solidification

2012 ◽  
Vol 182-183 ◽  
pp. 167-173
Author(s):  
Ming Li ◽  
Zhi Ming Shi ◽  
Dong Fang
Keyword(s):  
Magnetic Field ◽  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Phase Transformation ◽  
Optical Microscopy ◽  
Energy Dispersive Spectrum ◽  
Rich Phase ◽  
Transmission Electron ◽  
Scanning Electron

This paper studies iron-rich phase transformation law and mechanism of Al-20Si-10Fe alloy under the effect of plate magnetic field. with optical microscopy(OM)，scanning electron microscopy(SEM),energy dispersive spectrum(EDS)and transmission electron microscopy(TEM). The results show that plate magnetic field is directly involved in the phase transformation of iron-rich phase, making iron-rich phase change from lath-shaped β-Al5FeSi to herringbone-shapedα-Al8SiFe2. The enforcement of plate magnetic field during the phase-transforming process of β-Al5FeSi→α-Al8Si Fe2makes block α-Al1.3Si7.8Fe2.1phase yield out. And precipitation of α-Al1.3Si7.8Fe2.1phase is affected by the transforming process ofβ-Al5SiFe phase→α-Al8Si Fe2phase.

Low Hydrogen Pressure Induced High Anisotropy in HDDR-Treated Nd13Fe75Co4B8 Powders

2012 ◽  
Vol 602-604 ◽  
pp. 161-164
Author(s):  
Guang Bing Han ◽  
Shuang Fu
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Magnetic Properties ◽  
Hydrogen Pressure ◽  
Crystal Texture ◽  
High Anisotropy ◽  
Lamella Structure ◽  
Scanning Electron

High anisotropic Nd13Fe75Co4B8 magnetic powders are obtained with low desorption H2-pressure of the hydrogenation disproportionation desorption recombination (HDDR) process. Scanning electron microscopy (SEM) indicates a lamella structure in the 20 kPa desorption H2-pressure HDDR products and may be related to the high anisotropy. The magnetic powders with a desorption H2-pressure of 20 kPa have the magnetic properties of Br =0.86 T and Mr/Ms =0.81.This shows that the H2-pressure has great effect on the formation of crystal texture in the HDDR Nd-Fe-B powders.

Correlation of Cooling Conditions with the Shape of Hysteresis Loops in Air Cooled and Quenched Axis Shaft

2015 ◽  
Vol 644 ◽  
pp. 223-226
Author(s):  
Angelos Tsoutsias
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Magnetic Properties ◽  
Magnetic Hysteresis ◽  
Hysteresis Loops ◽  
Cooling Conditions ◽  
Magnetic Hysteresis Loops ◽  
Nondestructive Characterization ◽  
Scanning Electron

The present paper investigates the utilization of the magnetic hysteresis loops for the nondestructive characterization of annealed axis shaft samples. The resulting magnetic properties were further evaluated by examining the microstructure of the annealed samples by using scanning electron microscopy.

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