Synthesis and Characterization of ABi4Ti4O15 (A=Sr,Ba,Ca) Ceramic

The report presents the synthesis and characterization of ABi4Ti4O15 (A=Sr,Ba,Ca) ceramics.The samples are prepared by conventional solidstate reaction route. The room temperature X-ray diffraction study revealed that the compounds were having orthorhombic symmetry. Williamson and Hall equation was used to determine the microstrain ,the particle size and the dislocation density. The SEM micrograph shows plate like grains and the grain size are calculated. Temperature dependent dielectric study showed normal ferroelectric to paraelectric transition in SBT and CBT compound where as relaxor like behavior near phase transition. The Ferroelectric behavior were studied by hysteresis loop. The optical band gap are found to be 3.17 eV , 3.03 eV and 2.84 eV for SBT, BBT and CBT ceramic which is measured from the UV–Visible spectroscopy stud