偏铌酸铅PbNb2O6高温压电陶瓷的研究进展OA

Lead metaniobate(PbNb2O6,PN),a high-performance ferroelectirc material characterized by a tung-sten bronze-type structure,has emerged as a key candidate for high-temperature piezoelectric applications due to its exceptional properties,including a high Curie temperature(570℃),a favorable piezoelectric coefficient ratio(d33/d31),a low mechanical quality factor(Qm≈20),and outstanding thermal stability.This review sys-tematically elucidates the mechanisms by which the structural characteristics of PN materials influence their physicochemical properties,such as polarization response and dielectric loss,from the perspective of crystal chemistry and phase transition kinetics.Additionally,it discusses performance enhancements achieved through advanced preparation techniques and summarizes the application progress of PN materials in piezoelectric devices and energy storage systems.Furthermore,it addresses critical challenges,including the unstable of the ferroelectric phase at room temperature and high processing costs.Future research directions are proposed,focusing on multi-scale structural design,high-throughput fabrication technologies,and interdisciplinary applica-tion expansion.This work provides a foundational theoretical framework for the design and application of novel piezoelectric material systems.