DIELECTRIC AND MAGNETIC PROPERTIES OF BaTiO3 + MgCuZnFe2O4 NANOCOMPOSITES

Nanocrystalline MgCuZnFe2O4 and BaTiO3 powders were synthesized using the microwave hydrothermal (M-H) method at 160 degrees C for 45 min for the preparation of xBaTiO(3) + (1 - x) MgCuZnFe2O4. The nanopowders were characterized using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The particle size of the powders was found to be similar to 30 and similar to 40 nm for MgCuZnFe2O4 and BaTiO3, respectively. The nanopowders were mixed at different weight percentages and densified at 910 degrees C for 30 min using the microwave sintering method. The sintered composites were characterized using XRD and scanning electron microscopy (SEM). The density of the composites varies 93-96% of theoretical density. The density of the present composites increases as the weight percentage of BaTiO3 content increases. The frequency variation of dielectric constant (epsilon), dissipation factor (D), initial permeability (mu(i)) and quality factor (Q) were measured from 1 kHz to 1 MHz.