Effect of polymer adsorbed layer on magnetic particle dispersion

Barium hexaferrite suspensions for electrophoretic deposition

“…To prevent this, the magnetic attraction must be reduced by increasing the repulsive, i.e., the electrostatic, interactions between the particles. A stable suspension can be obtained, either with electrostatic repulsion or by coating the magnetic particles with a nonmagnetic layer of suitable thickness [25,26]. Another appropriate method is to decrease the particle size to the superparamagnetic limit [27].…”

Synthesis and rheological properties of nickel‐zinc ferrite polymer nanocomposites

“…The rheological measurements were carried out on a noncrosslinked system to investigate both the effect of powder on the properties of the composite and to highlight the rheomagnetic behavior of the powder. Figure 5 reveals that the behavior of the nanocomposite conforms well to the Bingham model 19, 20. The shear stress of the model is typically represented by $$ \tau = \tau _{0} + \eta _{0} \gamma ^{.}…”

Directed Assembly of BaFe12O19 Particles and the Formation of Magnetically Oriented Films

“…At even smaller separation distances of up to a few nanometers, they are additionally attracted by the van der Waals force. The respective interaction energies, E m and E vdw , for the geometry shown in Scheme can be calculated with eqs and 2, respectively. − Equation is valid for two flat surfaces with the interacting area S int , and eq is valid for two spherical particles. E m = − μ 0 π ρ 2 M s 1 M s 2 V 1 2 V 2 2 4 D 3 E normalv normald normalw = − A S int 12 normalπ l 2 E normalv normald normalw = − A 12 [ y x 2 + x y + x + y x 2 + x y +…”