Inorganic filler modified polymer nanocomposites extensively enter in our everyday lives. Depending on the chemical nature, structural arrangement, dimensions, aspect ratio as well as other architectural parameters of the filler particles corresponding polymer nanocomposites can possess certain specific, unconvential properties, i.e., enhanced barrier performance, conductivity, magnetic and electromagnetic shielding effect. One of the most interesting ways in this research area is a polymer nanocomposite  modified with a metallic nanofiller which could be viewed as a logical continuation for the scientific investigations started already long ago. In spite of much work already done in this field, many aspects of the metallic nanofiller modified polymer matrix nanocomposites still remain uncovered. Consequently this research is devoted to the investigation of the ferrite filled polymer nanocomposites. Fe-Si-O ferrite powder was obtained by plasma technology in cooperation with the institute of Inorganic Chemistry of Riga Technical University. Two fabrication methods, i.e., melt blending and solution casting, are used for preparation of polycarbonate and polyvinylalcohol based nanocomposites respectively. The amount of the magnetic filler in the nanocomposites was changed up to 10 vol. percent. Most important technological parameters of the nanocomposite manufacturing methods are defined. Tensile stress-strain characteristics (modulus of elasticity), calorimetric qualities (glass transition, melting temperature, crystallinity degree) as well as physical (density, melt flow rate), electrical (volume and surface resistivity) and magnetic (coercivity) properties of the nanocomposites are investigated and interesting results are obtained. Some possible application examples of such nanocomposites are materials used in electronics housings for electromagnetic charge suppression and EMI shielding, motor and actuator devices, etc.

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1. Production of fine-grained α-SiAlON ceramics from nanopowders