IMF2017

The microstructure characteristic and dielectric properties of doped BaTiO₃ ceramics were investigated in the light of Clausius – Mossotti relation (CMR) which incorporates both the Curie and Curie – Weiss Laws. The samples of rare earth doped BaTiO₃ were prepared using by conventional solid state procedure and sintered at 1320 ^oC. Microstructural and compositional studies were performed by SEM equipped with EDS system. The dielectric characteristic of doped BaTiO₃ ceramics like as dielectric constant have been done by using LCR-Metra Agilent 4284A in the frequency range 20 Hz - 1 MHz and temperature range 20-180 ^oC. The Clausius – Mossotti relation is used to clarify the influence of dopant on the dielectric properties and BaTiO₃ phase transformation. Curie parameters (C, Tc) and a critical exponent of nonlinearity (g) were calculated by using a Curie-Weiss law. Also, new approach on correlation between microstructure and dielectric properties of doped BaTiO₃ based on fractal geometry (grains shapes, pores and intergranular contacts) has been developed, using method of fractal modeling of a microstructure configurations reconstruction.