Mixtures of Ferromagnetic and Non-Magnetic Beads as a Model of Granular Alloys: Magnetic Properties and Impedance

2001 ◽  
Vol 373-376 ◽  
pp. 573-576
Author(s):  
A.B. Granovsky ◽  
Nikolai S. Perov ◽  
O. Filippov ◽  
A. Rakhmanov, Jr. ◽  
J.P. Clerc ◽  
...  
1990 ◽  
Vol 67 (2) ◽  
pp. 938-942 ◽  
Author(s):  
A. Gavrin ◽  
C. L. Chien

2009 ◽  
Vol 483 (1-2) ◽  
pp. 620-622 ◽  
Author(s):  
L.F. Kiss ◽  
D. Kaptás ◽  
J. Balogh ◽  
F. Tanczikó ◽  
M. Major ◽  
...  

Author(s):  
Scott S. H. Tsai ◽  
Jason S. Wexler ◽  
Ian M. Griffiths ◽  
Howard A. Stone

We describe a microfluidic system that uses a magnetic field to deflect paramagnetic beads in the direction normal to the flow. Through modeling and experimentation, we study this system to separate beads by their magnetic properties and size. We also use a similar system to move the beads from one fluid stream to an adjacent miscible stream.


Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1204
Author(s):  
Sergio Valverde Durán ◽  
Byron Lapo ◽  
Miguel Meneses ◽  
Ana María Sastre

Neodymium is a key rare-earth element applied to modern devices. The purpose of this study is the development of a hybrid biomaterial based on chitosan (CS) and manganese ferrite (MF) for the recovery of Nd(III) ions from the aqueous phase. The preparation of the beads was performed in two stages; first, MF particles were obtained by the assessment of three temperatures during the co-precipitation synthesis, and the best nano-MF crystallites were incorporated into CS to obtain the hybrid composite material (CS-MF). The materials were characterized by FTIR, XRD, magnetization measurements, and SEM-EDX. The adsorption experiments included pH study, equilibrium study, kinetics study, and sorption–desorption reusability tests. The results showed that for MF synthesis, 60 °C is an appropriate temperature to obtain MF crystals of ~30 nm with suitable magnetic properties. The final magnetic CS-MF beads perform maximum adsorption at pH 4 with a maximum adsorption capacity of 44.29 mg/g. Moreover, the material can be used for up to four adsorption–desorption cycles. The incorporation of MF improves the sorption capacity of the neat chitosan. Additionally, the magnetic properties enable its easy separation from aqueous solutions for further use. The material obtained represents an enhanced magnetic hybrid adsorbent that can be applied to recover Nd(III) from aqueous solutions.


2003 ◽  
Vol 254-255 ◽  
pp. 79-81 ◽  
Author(s):  
R Garcı́a Calderón ◽  
D.H Ucko ◽  
L Fernández Barquı́n ◽  
Q.A Pankhurst

2015 ◽  
Vol 374 ◽  
pp. 647-654 ◽  
Author(s):  
S. Dhara ◽  
R. Roy Chowdhury ◽  
S. Lahiri ◽  
P. Ray ◽  
B. Bandyopadhyay

1994 ◽  
Vol 75 (10) ◽  
pp. 6604-6606 ◽  
Author(s):  
Gang Xiao ◽  
Jian‐Qing Wang

2002 ◽  
Vol 91 (10) ◽  
pp. 8596 ◽  
Author(s):  
A. Garcı́a Prieto ◽  
M. L. Fdez-Gubieda ◽  
C. Meneghini ◽  
A. Garcı́a-Arribas

2021 ◽  
pp. 132-137
Author(s):  
Сергій Сергійович Товкач

The creation of competitive engines is impossible without the development and implementation of new materials and design and technological solutions. At present, in the engines, nickel alloys obtained by directional crystallization are widely used, including monocrystalline, granular alloys. The use of various composite materials, permanent joints from dissimilar materials is constantly expanding, extensive research is being carried out to create a structure from monolithic ceramics and intermetallic compounds. The successful introduction of unconventional materials is impossible without a thorough study of their structural strength, magnetic properties, features of deformation, and destruction, taking into account the specifics of these materials when developing the design and manufacturing technology of a part or engine unit. The article discusses a software package for the optimal design of control system elements for aircraft gas turbine engines using a description of their magnetic properties. Due to the modular structure of the optimization program, various optimization procedures and calculation programs can be used. It was determined that, for the Ising model, the formation of domains with a given spread of spins at a temperature T and a vector of magnetic induction B is calculated array element using a random number generator. The number of tests L depends on the size of the sample. In the Ising model, all parts of the N*N system are contenders for testing. So, Step corresponds to the number of Monte Carlo steps. Since the parts are selected once on average, it is possible to select one particle several times or not to select it at all. Therefore, the Step value should be significantly greater than one. For a convenient implementation of a certain model, its application with a graphical magnetization interface with a different number of iterations has been considered. When executing the command file, the following should be performed: building a geometric model, building a finite element mesh, applying loads, calculating the stress-strain state (SSS), displaying the results.


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