| Abstract |
Sensor applications normally adopt cheap ferrites or more expensive AlNiCo as Permanent Magnets(PM); if a critical issue can be found it lies in the poor performance of the first and in the cost of thelatter. The driver of the work presented in the paper is the research of a material that could replace theabove mentioned PM. Hybrid Magnetic Composites (HMC) can represent a reliable solution; they areobtained mixing hard and soft magnetic materials together with a polymeric binder. The experience ofprevious research activities has been helpful in the selection of the materials, both soft and hard, andof the binder to be adopted. The mix of different components percentages has been deeplyinvestigated, with specimen magnetic characterization, in order to find out the most promisingcomposition. The final part of the activity has been devoted to apply the obtained HMC to practicalcases; in particular, the applications that have been selected to experience the new materials are guitarpickups and encoder wheels. The obtained preliminary results are satisfactory and encouraging theprosecution of the work; the obtained HMC can represent a viable solution to replace ferrites andAlNiCo materials. |
