”Investigations on The Finite Size Effects of Some Inverse Spinels and Studies on Their Composites Based on Nitrile Rubber”

by George Mathew

Institution: Cochin University of Science and Technology
Department: Physics
Year: 2004
Keywords: Diamagnetism; Para magnetism; Ferromagnetism; Ferrites; Nano Structured Magnetic Materials
Record ID: 1219855
Full text PDF: http://dyuthi.cusat.ac.in/purl/3813


In the present study, nano particles of NiFe3O4, I_.l()5Feg5O4 and CoFegO4 are prepared by sol gel method. By appropriate heat treatments, particles of different grain sizes are obtained. The structural, magnetic and electrical measurements are evaluated as a function of grain size and temperature. NiFe3O4 prepared in the ultrafine regime are then incorporated in nitrile rubber matrix. The incorporation was carried out according to a specific recipe and for various loadings of magnetic fillers. The cure characteristics, magnetic properties, electrical properties and mechanical properties of these elastomer blends are carried out. The electrical permittivity of all the rubber samples in the X — band are also conducted Cochin University of Science & Technology