Effect of (Bi, Li) co-doping on dielectric and ferroelectric properties in BaZr0.15Ti0.85O3 ceramics

Bi and Li co-doping BaZr0.15Ti0.85O3 ceramics were fabricated by the solid-state method, and investigated the impact on the microstructural, dielectric, ferroelectric and energy storage properties. XRD results show that the structure is perovskite and there is no secondary phase in all samples. SEM pictures indicate that the average grain size significantly decreases as the doping concentration increase. In addition, the phase transition peak is broadened and the Curie temperature shifts towards lower temperature. This phenomenon provides a significant possibility for the application to room temperature, and diffuse phase transition occurs. Moreover, P-E hysteresis loops of all samples demonstrate that remnant polarization and saturated polarization diminish as the doping concentration increases. A high energy storage density of 1.23 J/cm(3) is obtained in the doped sample, and the energy storage efficiency is also significantly enhanced compared with the undoped sample.

Automated summary

Bi and Li co-doped BaZr0.15Ti0.85O3 ceramics were fabricated by the solid-state method and their impact on microstructural, dielectric, ferroelectric, and energy storage properties were investigated. XRD results showed a perovskite structure with no secondary phase in all samples. SEM pictures revealed a significant decrease in average grain size with increasing doping concentration. Moreover, the phase transition peak broadened and the Curie temperature shifted towards lower temperature. The doped sample exhibited a high energy storage density of 1.23 J/cm(3) and significantly enhanced energy storage efficiency compared to the undoped sample.