Preparation and dielectric properties of oxide added NaCl-KCl polycrystals

Pure and ZnO and CdO added (separately) polycrystals of NaCl, KCl and (NaCl)_0.5(KCl)_0.5 were prepared by the melt method. Density, atomic absorption spectroscopic and X-ray diffraction measurements indicate that the ZnO and CdO have entered into the lattices of alkali halide crystals. The dielectric measurements indicate that the dielectric parameters increase with the increase in temperature. Also, the dielectric constant and dielectric loss factor values decreased whereas the electrical conductivities increased with the increase in frequency of the AC applied. Significant changes have been observed with the dielectric parameters caused by ZnO and CdO additions. Also, the depth profile study was carried out on CdO added crystals which indicates that the dopant addition creates different layers along the crystal with increase of dopant content from top to bottom.