Title :
Carbonyl Iron Suspension With Core–Shell Structured Fe3O4@SiO2 Nanoparticle Additives and its Magnetorheological Property
Author :
Shang Hao Piao ; Hyun Sik Chae ; Hyoung Jin Choi
Author_Institution :
Dept. of Polymer Sci. & Eng., Inha Univ., Incheon, South Korea
Abstract :
Magnetic Fe3O4@SiO2 nanoparticles were initially synthesized by a sol-gel process and introduced to a soft magnetic carbonyl iron particle-based magnetorheological (MR) fluid to improve its MR properties and dispersion stability. Structure and properties of the core-shell Fe3O4@SiO2 nanoparticles were characterized, showing that they are soft magnetic. MR characteristics of two MR fluid systems with and without Fe3O4@SiO2 additives were investigated and compared under different magnetic field strengths using a rotational rheometer, exhibiting typical MR behaviors. Dispersion stability of the MR fluid was also characterized by an optical analyzer system of Turbiscan.
Keywords :
core-shell nanostructures; iron compounds; magnetic particles; magnetorheology; nanofabrication; nanomagnetics; nanoparticles; silicon compounds; soft magnetic materials; sol-gel processing; suspensions; Fe3O4-SiO2; Turbiscan optical analyzer system; carbonyl iron suspension; core-shell nanoparticle structure; core-shell structured nanoparticle additives; dispersion stability; magnetic field strength; magnetic nanoparticles; rotational rheometry; soft magnetic carbonyl iron particle-based magnetorheological fluid; soft magnetic material; sol-gel process; Fluids; Iron; Magnetic fields; Magnetic liquids; Magnetomechanical effects; Nanoparticles; Suspensions; Additive; Carbonyl iron; Fe3O4@SiO2; additive; carbonyl iron (CI); dispersion; magnetorheological; magnetorheological (MR);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2015.2445786
