ELECTRICAL BEHAVIOR OF ATTRITOR PROCESSED AL PMMA COMPOSITES/

Al/PMMA composites containing different volume fractions of aluminium were prepared by attritor milling followed by hot pressing and their t hermal expansion and electrical behaviour were studied. Room temperatu re resistivity oi these composites dropped by several orders of magnit ude when the volume percent of aluminium ranged between 20 and 40 vol. %. Microstructural examination revealed the presence of continuous cha ins of aluminium in highly conducting composites. The dielectric const ant asci dissipation factor of the composites increased with increase in aluminium content. This has been attributed to the interfacial pola rization associated with aluminium particles. Copyright (C) 1996 Elsev ier Science S.A.