화학공학소재연구정보센터
Materials Chemistry and Physics, Vol.231, 372-381, 2019
Dielectric and ferroelectric investigations of barium doped double perovskite Pb2BiVO6 for electronic and optical devices
The polycrystalline ceramic PbBaBiVO6 manifesting the complex double perovskite structure was tailored by the conventional solid state route at a moderate temperature. Qualitative phase analysis and formation of the ceramic was affirmed by XRD Analysis. The X-ray Powder Diffraction pattern of the compound explored at room temperature affirms the single phase formation with double perovskite structure exhibiting orthorhombic phase. Microstructural analysis of the studied compound procured from the Scanning electron microscope (SEM) validates the formation of dense microstructures and non-uniformly distributed grains with minimal voids. Compositional analysis was shaped through the Electron Diffraction Spectroscopy (EDS). Impedance, modulus, dielectric (epsilon(r) and tan delta) and conductivity parameters of the compound was studied using the LCR analyzer at different temperatures and wide range of frequencies. The polarization and dielectric study affirms the presence of ferroelectricity in the ceramic with transition temperature lying much above the room temperature. The room temperature loss tangent (tand) value reveals material can be useful for device like microelectronics. Optical equities of the ceramic were further analyzed by the RAMAN, FTIR, UV-VIS and Photoluminescence spectroscopy.