Optical, thermal and dielectric properties of Bi4(TiO4)3 ceramic powders

Bismuth titanate (Bi4(TiO4)3) powders were synthesised by a solid state reaction method and their properties were investigated. An intense blue emission at 480 nm was measured with an excitation at 418 nm. The blue emission from this ceramic powder has been explained. The phase formation was investigated by XRD. The morphology and composition of the ceramic powders were studied from the measurement of SEM and EDS profiles. FTIR and Raman spectra were used to analyse the presence of functional groups and Raman active modes in the Bi4(TiO4)3 ceramic powders. The sintering temperature was optimised at 1100 C. The dielectric properties of the ceramic powders, in the frequency range 200 Hz-3 MHz at 300 K, were also evaluated.