THE STRUCTURAL, SPECTRAL AND DIELECTRIC PROPERTIES OF COMPOSITE SYSTEM NZF-BT

摘要

The Composite material of NiZnFe2O4 and BaTiO3 were prepared by double sintering ceramic technique. X-ray diffraction pattern for composite xBaTiO_3 + (1-x) Ni_(0.8)Zn_(0.2) Fe_2O_4 where (x = 0%, 20%, 40%,60%, 80% and 100%) show the presence of diphase and confirms the successful preparation the composite. Some parameters were deduced from the analysis of x-ray like porosity, density, particle size and the lattice constant for both phases were calculated from XRD. SEM shows nearly homogeneous microstructure with good dispersion of BT grains and the presence of some pores. There was an enlargement of BT grain by BT content. IR spectra of composite sample indicate that BT content affect the intermolecular character of the ferrite. A rise in dielectric constant occurs at high temperature due to the effect of space change resulting from the increase of change carriers in paramagnetic region. The dielectric loss (tan δ) decrease by increasing BT content.