Ferroelectric Relaxor Behaviour of Ca、Bi Doped Ba_0.67Sr_0.33TiO₃ Ceramics

Ca、Bi doped Ba_0.67Sr_0.33TiO₃ ceramics were prepared using the lowcost solid phase method. The relaxor characteristics have been investigated by TEM and complex impedance spectroscopy analysis. The results showed that Ba_0.67Sr_0.33TiO₃ ceramics exhibit distinct ferroelectric relaxor behaviors by doping Ca、Bi, and with the increase of Ca、Bi content, the diffusion of the dielectric peak and the degree of relaxor characteristics also increased.