Temperature effect on the magneto-rheological behavior of magnetite particles dispersed in an ionic liquid
-
Guerrero-Sanchez, Carlos; Ortiz-Alvarado, Armando; Schubert, Ulrich S.
- Abstract:
- The magneto-rheological properties of iron(II, III) oxide particles dispersed in the
ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate were investigated in the
temperature range from 25 °C to 76 °C. The experimental results have revealed that the
apparent viscosity of the dispersion slightly changes with the temperature when a constant
magnetic field is applied and its value mainly depends on the shear rate and the strength of the
magnetic field. The viscosity of the dispersion remains practically unmodified with both the
temperature and the magnetic field intensity as the magnetic saturation of the material is
reached; in this regime the viscosity will only depend on the applied shear rate. In contrast, the
yield stress values of the dispersion as well as the corresponding shear stress vs. shear rate
curves have shown and inversely proportional behavior with temperature for a constant
magnetic field. Moreover, a power law model was utilized to predict the temperature
dependence of the yield stress under the presence of a constant magnetic field.
- Year:
- 2009
- Type of Publication:
- Article
- Journal:
- Journal of Physics: Conference Series
- Volume:
- 149
- Pages:
- 012052/1 - 5