A device for measuring the concentration and dispersion quality of magnetic particle suspensions

1992 ◽  
Vol 41 (1) ◽  
pp. 10-16 ◽  
Author(s):  
T.M. Kwon ◽  
M.S. Jhon ◽  
T.E. Karis
Keyword(s):  
Magnetic Particle ◽  
Particle Suspensions ◽  
Dispersion Quality

scholarly journals Introducing a frequency-tunable magnetic particle spectrometer

2015 ◽  
Vol 1 (1) ◽  
pp. 249-253 ◽  
Author(s):  
André Behrends ◽  
Matthias Graeser ◽  
Thorsten M. Buzug
Keyword(s):  
Magnetic Nanoparticles ◽  
Image Quality ◽  
Magnetic Particle ◽  
Imaging Modality ◽  
Magnetic Particle Imaging ◽  
Common Technique ◽  
Frequency Tunable ◽  
Excitation Frequencies ◽  
Particle Imaging

AbstractImage quality in the new imaging modality magnetic particle imaging (MPI) heavily relies on the quality of the magnetic nanoparticles in use. Therefore, it is crucial to understand the behaviour of such particles. A common technique to analyze the behaviour of the particles is magnetic particle spectrometry (MPS). However, most spectrometers are limited to measurements at a single or multiple discrete excitation frequencies. This paper introduces a frequency-tunable spectrometer, able to perform measurements in the range of 100 Hz - 24kHz.

Dispersion quality of magnetic tapes prepared from a waterborne formulation

1994 ◽  
Vol 30 (6) ◽  
pp. 4071-4073 ◽  
Author(s):  
Song Cheng ◽  
Hong Fan ◽  
J.W. Harrell ◽  
A.M. Lane ◽  
D.E. Nikles
Keyword(s):  
Dispersion Quality

Nondestructive Inspection Methods for Railroad Castings

2010 ◽  
Author(s):  
Daniel Carter ◽  
Kari Gonzales
Keyword(s):  
Magnetic Particle ◽  
Phased Array ◽  
Field Tests ◽  
Ultrasonic Pulse ◽  
Nondestructive Inspection ◽  
Inspection Method ◽  
Technology Center ◽  
Pulse Echo ◽  
Inspection Techniques

Transportation Technology Center, Inc. (TTCI) has investigated various nondestructive inspection (NDI) methods to determine if they are capable of reliably inspecting side frames, bolsters, knuckles, and couplers. The NDI methods used for this investigation include dry and wet (fluorescent) magnetic particle, liquid penetrant, alcohol wipe, visual, ultrasonic (pulse-echo and phased array), and radiography. Inspection results from all methods were used to determine which methods produced repeatable results. From the initial inspection analysis, TTCI engineers determined that the magnetic particle inspection method is the most capable for detecting defects in railroad castings. Further investigation of the magnetic particle technique was completed to develop reliable inspection methods for use on bolsters, side frames, knuckles, and couplers. Each of the inspection techniques have been used for inspections in the field. Using the results of the field tests, procedures were developed by TTCI and submitted to the Association of American Railroads’ (AAR) Coupling Systems and Truck Castings Committee for review and implementation. The inspection procedures can be used by manufacturers, railroads, and car repair shops. Limitations of the inspection procedures include the amount of time necessary to perform the inspection and the reliability of detecting certain types of defects below the surface of the casting. Although these limitations exist, the procedures developed by TTCI are expected to improve the quality of in-service castings and reduce the number of train partings and derailments due to broken or cracked components.

scholarly journals Quantifying the dispersion quality of partially aggregated colloidal dispersions by high frequency rheology

Soft Matter ◽  
2017 ◽  
Vol 13 (43) ◽  
pp. 7897-7906 ◽  
Author(s):  
Bram Schroyen ◽  
James W. Swan ◽  
Peter Van Puyvelde ◽  
Jan Vermant
Keyword(s):  
High Frequency ◽  
Colloidal Dispersions ◽  
Frequency Limit ◽  
Hydrodynamic Stress ◽  
High Frequency Limit ◽  
Dispersion Quality

The dispersion quality of colloidal dispersions is quantified by analysing the hydrodynamic stress contributions in the high frequency limit.

Studying dispersion quality of nanoparticles into a bio-based coating

2015 ◽  
Vol 89 ◽  
pp. 246-251 ◽  
Author(s):  
Mojgan Nejad ◽  
Paul Cooper ◽  
Veronic Landry ◽  
Pierre Blanchet ◽  
Ahmed Koubaa
Keyword(s):  
Dispersion Quality

Rheological study of magnetic particle suspensions

1997 ◽  
Vol 49 (3) ◽  
pp. 225-228 ◽  
Author(s):  
T.M. Kwon ◽  
M.S. John ◽  
H.J. Choi
Keyword(s):  
Magnetic Particle ◽  
Particle Suspensions ◽  
Rheological Study
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