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, CaBi2Nb2O9 textured ceramics with F00 ������ -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 d33 of 20.6-24.9 pC/N, remanent polarization Pr of 21.3-22.9 & mu;C/cm2, and ultra-high ferroelectric Curie temperature TC of 950-960 degrees 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 CaBi2Nb2O9. This simple textured approach is expected to be widely applicable for the development of high-performance and high-temperature piezoelectric ceramics.