Strong textured ferroelectric ceramics CaBi2Nb2O9 with superior piezoelectric response via conventional solid-state technique.

High-performance and high-temperature piezoelectrics play a vital role in various applications. A major challenge, however, is how to improve their electric properties to meet the applications that demand sensitivity and reliability. Here, CaBi 2 Nb 2 O 9 textured ceramics with F 00 l ∼ 40%–70% were synthesized only through the conventional solid-state technique with the addition of CuO sintering aid. The rather excellent electrical properties with piezoelectric response d 33 of 20.6-24.9 pC/N, remanent polarization P r of 21.3-22.9 μ C/cm2, and ultra-high ferroelectric Curie temperature T C of 950-960 °C can be simultaneously achieved. Our results reveal that adding CuO sintering aid can induce strong texture and enhance lattice distortion, and makes domains miniaturization and diversification. The adjustment of microstructural and domain configuration gives rise to enhance the electrical properties of CaBi 2 Nb 2 O 9. This simple textured approach is expected to be widely applicable for the development of high-performance and high-temperature piezoelectric ceramics. • CBNO textured ceramics ( F 00 l ∼ 40–70%) were prepared by the solid-state technique. • P r in CBNO-based piezoceramics is 3–10 times as large as previous reported. • High d 3 3 and T C superior to most bismuth layered-structure ceramics. • Lattice distortion and grain orientation give rise to improve electrical properties. • Adding CuO sintering aid can make domains miniaturization and diversification. [ABSTRACT FROM AUTHOR]