advanced
Journal Information
Journal Information
   Description
   Editorial Board
   Guide for Authors
   Ordering

Contents Services
Contents Services
   Regular Issues
   Special Issues
   Authors Index

Links
Links
   FEI STU Bratislava
   SAS Bratislava

   Feedback

[6, 2013] 

Journal of Electrical Engineering, Vol 64, 6 (2013) 381-385 DOI: 10.2478/jee-2013-0058

ACOUSTIC PROPERTIES OF MAGNETIC FLUIDS BASED ON TRANSFORMER OIL UNDER MAGNETIC FIELD

Jozef Kúdelčík – Peter Bury – Peter Kopčasnský – Milan Timko – Vlasta Závišová

   The structural changes in magnetic fluids based on transformer oil TECHNOL and MOGUL upon the effect of an external magnetic field and temperature were studied by acoustic spectroscopy. When a magnetic field is increased, the interaction between the magnetic field and the magnetic moments of the nanoparticles leads to the aggregation of magnetic nanoparticles and following clusters formation. However, the temperature of magnetic fluids has also very important influence on the structural changes because of the mechanism of thermal motion that acts against the cluster creation. The live time of clusters have relative long time scale for the magnetic fluid based on TECHNOL, while for MOGUL is quite short.

Keywords: magnetic fluid, transformer oil, acoustic spectroscopy, clusters, magnetic field


[full-paper]


© 1997-2019  FEI STU Bratislava