Ca0.4Sr0.6Bi4Ti4O15 ceramics with a-axis preferred orientation were prepared by a solid-state reaction method. The cylindrical Ca0.4Sr0.6Bi4Ti4O15 ceramics were cut into two types of plates: one was along the cylinder axis (A), and the other was perpendicular to the direction of the cylinder axis. The effects of sintering temperature on the structure and electrical properties of the Ca0.4Sr0.6Bi4Ti4O15 ceramics were investigated. When the sintering temperature was 1180 oC, sample A gave the highest a-axis (200) orientation with a value of about 27.1%. At this sintering temperature, sample A showed better dielectric properties and ferroelectric properties, the relative dielectric constant (εr), dielectric loss (tan δ), remnant polarization (Pr), and coercive field (Ec) were 217.6, 0.0027, 14.2 μC/cm2 and 49.6 kV/cm, respectively.

Keywords: Ca0.4Sr0.6Bi4Ti4O15 ceramic, grain orientation, ferroelectric property.