Relaxor behaviour and dielectric properties of BiFeO3 doped Ba(Zr0.1Ti0.9)O3 ceramics

摘要

Ba_{1a?’e?‘￥}Bi_e?‘￥(Ti_0.9Zr_0.1)_{1a?’e?‘￥}Fe_e?‘￥O₃ (e?‘￥ = 0a€“0.075) ceramics are prepared using a conventional solid state reaction method. X-ray diffraction shows the presence of a single phase. Addition of Bi3+ and Fe3+ strongly influences the crystal structure and dielectric properties of the ceramics. The evolution from a normal ferroelectric to a relaxor ferroelectric is emphasized. Ba_0.99Bi_0.01(Ti_0.9Zr_0.1)_0.99Fe_0.01O₃ ceramic shows a relaxor behaviour at room temperature with e??￥ e?‘?_m =12 K. e?‘?a€“e??? hysteresis loop of the composition, e?‘￥ = 0.007, shows a remanent polarization (e?‘?_r) of 0.5 e???C/cm2 with a coercive field (e???_C) of 2 kV/cm. Raman spectra of all compounds are performed and correlated well with the X-ray diffraction and dielectric measurement results.