Processing, Microstructure and Dielectric Properties of the Bi5Ti3FeO15 Ceramic

Abstract

The aim of the present work is the analysis of microstructure, dielectric permittivity and thermal properties analysis of Bi5Ti3FeO15 ceramics obtained by two methods. The studied Bi5Ti3FeO15 ceramics were prepared by conventional synthesis and hot uniaxial pressing reaction from the conventional mixture of oxides, viz. TiO2, Fe2O3, Bi2O3. The studied material has layered perovskite like structures, first described by Aurivillius in 1949 and Subbaro in 1969. The ceramic Bi5Ti3FeO15 is known to contain a series of compounds with the general formula: Bim+1Fem¡3Ti3O3m+3. The X-ray diffraction methods were used for qualitative phase analysis of studied samples. The morphology was analyzed by scanning electron microscopy method. The thermal properties of the studied materials were measured using the differential thermal analysis at a constant heating rate of 15 K/min under an argon protective atmosphere. Thermal dependence of dielectric permittivity was studied between room temperature and 1137 K.