INTERACTION BETWEEN FERRITE PARTICLES AND OXYGEN MOLECULES WITHIN THE POLYESTER MATRIX OF LIGHTWEIGHT MAGNETIC COMPOSITES

摘要

Characterization and assessment of the quality and performances of a new class of lightweight magnetic composites, containing a ferrite additive, and used in aerospace, electronic and chemical industries are discussed. The ferrite particles that are introduced into the composite structure induce the magnetic properties improving the interface quality. The presence of air micro bubbles in the organic matrix of composite is a major defect that has to be reduced. The paramagnetic properties of the oxygen molecules can control the spreading of the air micro bubbles risen on the interface. The ferrite particles interacting with the oxygen molecules, play the role of a "vacuum cleaner" absorbing the bubbles situated at the interface level. Moreover, if when producing the composite, an external vibrating magnetic field is active, it is possible to obtain the scattering of the micro bubbles in the mass of the organic matrix. Therefore, it is expected an enhancement of the interface fitness.