CONDUCTIVITY MEASUREMENT ON THE DOUBLY SINTERED SAMPLES OF MIXED FERRITES OF Ni-Zn-Cu

摘要

Ferrites are candidate substances which find wide applications in microwave devices, computer memories and magnetic recording. They offer low eddy currents and dielectric losses for the propagation of electromagnetic waves within the range of frequencies up to few GHz. In the present work the NiZnCu ferrite system is prepared by the standard ceramic double sintering method. The single phase formation of it is confirmed through XRD. The value of dielectric constant, conductivity, activation energy and tanδ are measured. The conductivity values (at 150℃ and at 10 kHZ) ranges from 9.621 × 10~(-6) and 1.59 × 10~(-3) Scm~(-1) at 150℃ and 10 kHz and dielectric constant varies from 34.099 to 196.128, the activation energy falls in between 0.223 and 0.519 eV and the tan 5 varies from 0.681 to 14.592.