MAGNETIC PROPERTIES OF FERRITE-POLYMER COMPOSITES

Ladislav Valko - Peter Buček - Rastislav Dosoudil - Marianna Ušáková

   The magnetic properties of ferrite polymer composites prepared with polyvinyl chloride (PVC) or polyvinyl alcohol (PVA) diamagnetic matrices and with an MnZn ferrite powder filler have been investigated. Emphasis was given on the influence of the filler particles morphology (shape) and granulometry (volume fraction or concentration) on the measured magnetic properties. The effective magnetic permeability of a heterogeneous ferrite-polymer composite material was measured at different ferrite concentrations and temperatures. It was observed that the ferrite-polymer composite samples prepared with the PVA matrix have more appropriate magnetic and mechanical properties in comparison with the samples prepared with a PVC diamagnetic matrix.

Keywords: composite material, polyvinyl chloride, polyvinyl alcohol, MnZn ferrite, nonmagnetic matrix

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