(K,Na)NbO_(3)基无铅压电陶瓷温度稳定性的研究与进展

Progress in research of temperature stability of (K,Na)NbO_(3)-based lead-free piezoceramics

基于可持续发展的迫切需求,环保型无铅压电陶瓷成为当前压电铁电领域的研究前沿和热点之一.近年来,铌酸钾钠((K,Na)NbO_(3),KNN)基无铅压电陶瓷因其迅速提升的压电性能,备受研究者所关注,有望取代部分铅基压电陶瓷.特别是新型相界、纳米畴等调控手段有效提升KNN基陶瓷压电系数至部分铅基水平,使其表现出优异的应用前景,有望应用于加速度传感等器件.然而相比迅速发展的压电性能,KNN陶瓷的压电温度稳定性仍相对进展缓慢,主要归结于其多晶型相界的特征,阻碍其面向实际应用发展.因此,该文结合国内外研究进展,针对KNN基无铅压电陶瓷,重点介绍了其压电系数和电致应变的温度稳定性的研究进展,并对今后该陶瓷温度稳定性的研究提出了一些展望.

Based on the urgent demand for sustainable development,environmentally friendly lead-free piezoelectric ceramics have become one of the forefront and hotspots in the field of piezoelectric and ferroelectric materials.In recent years,lead-free potassium sodium niobate((K,Na)NbO_3,KNN) based ceramics have attracted significant attention from researchers due to their rapidly improving piezoelectric properties,and they are expected to replace certain lead-based piezoelectric ceramics.In particular,new phase boundary and nano-domains have effectively enhanced the piezoelectric coefficients of KNN-based ceramics to a level comparable to some lead-based materials,demonstrating excellent prospects for applications such as acceleration sensors.However,compared to the rapid progress in piezoelectric performance,the piezoelectric temperature stability of KNN ceramics has relatively lagged behind,mainly due to the characteristics of polycrystalline phase boundaries,which hinder their practical application development.Therefore,based on the research progress at home and abroad,this paper focuses on KNN-based lead-free piezoelectric ceramics,specifically introducing the research progress in the temperature stability of their piezoelectric coefficients and electro-strain,and proposes some prospects for future research on the temperature stability of these ceramics.