Sedimentation Stability of Water Based Ni0.5Zn0.5Fe2O4 Magnetic Fluid At Different pH Values.

In order to research the sedimentation stability of water-based magnetic fluid, the sedimentation stability of water-based Ni_0.5Zn_0.5 Fe₂O₄ magnetic fluid at different pH values was studied, and the experimental phenomena were analyzed. The results show that when the mass fraction of OA (oleic acid) is 4%, the mass fraction of SDS (sodium dodecyl sulfate) is 3%, and the mass fraction of Ni_0.5Zn_0.5 Fe₂O₄ is 2. 5%, the magnetic fluid as-prepared has the best stability. When pH value is <7, the sedimentation stability of magnetic fluid decreases with the decrease of pH value, but the viscosity increases with the decrease of pH value. When pH is >7, the sedimentation stability of MHD decreases with the increase of pH value. The higher the temperature is, the better the dispersion is. The pH value has a certain influence on the thermal dispersion of the magnetic fluid. The pH value has an important influence on the magnetic field settling stability and magnetic viscosity of magnetic fluid. Under the action of constant or increasing magnetic fields, the settling coefficient and viscosity of magnetic fluid change with the change of magnetic field and pH value. [ABSTRACT FROM AUTHOR]