Russian State Scientific Institute for Chemical Technologies of Organoelement Compounds
Laboratory for Magnetic Elastomeric Materials and Composites
Structuring of magnetic particles inside magnetic elastomer based on magnetically hard filler
Video 1. Structuring of spherical NdFeB-particles (pre-magnetized at 1.7 T) along the initial magnetization direction.
Vigorous formation of linear chain-like structures. After the external field is turned off, the structures remain to a large extent.
Vigorous formation of linear chain-like structures. After the external field is turned off, the structures remain to a large extent.
Video 2. Structuring of spherical NdFeB-particles (pre-magnetized at 1.7 T) in a field opposite to that of initial magnetization.
Complete structural rearrangement owing to the rotation of particles. Assembling of particles into ring-like structures after turning the external field off.
Complete structural rearrangement owing to the rotation of particles. Assembling of particles into ring-like structures after turning the external field off.
Video 3. Video 3. Structuring of plate-like NdFeB-particles (pre-magnetized at 1.7 T) along the initial magnetization direction.
After the external field is turned off, the structures remain to a large extent.
After the external field is turned off, the structures remain to a large extent.
Video 4. Structuring of plate-like NdFeB-particles in a field opposite to that of initial magnetization.
Complete structural rearrangement owing to the rotation of particles. Vigorously reorienting, the particles form new structures in a reverse field. Formation of mild ring-like structures after turning the external magnetic field off.
Complete structural rearrangement owing to the rotation of particles. Vigorously reorienting, the particles form new structures in a reverse field. Formation of mild ring-like structures after turning the external magnetic field off.
Notes to Videos 5 and 6 as compared to Videos 1 and 2
The graph depicts the magnetization and remanence of magnetic elastomer as functions of magnetic field. The data were recorded for an MAE sample based on rigid polymer impregnated with spherical NdFeB particles at a concentration of 75 wt.%, a coercivity of 9 kOe. As may be seen from the graph, at 10 kOe the filling powder gains a 30% degree of magnetization with respect to a maximum of remanence.