High Performance Lead-free Piezoelectric Ceramics in the (K,Na)NbO3-LiTaO3 Solid Solution System
High Performance Lead-free Piezoelectric Ceramics in the (K,Na)NbO3-LiTaO3 Solid Solution System
复制标题
DOI：
10.1080/00150190600732512
复制
发表时间：
2006-08
期刊：
影响因子：
0.8
通讯作者：
Y. Saito;H. Takao
中科院分区：
文献类型：
--
作者：
Y. Saito;H. Takao
开发了一种密度大、压电常数大、稳定性高的新型固溶体系{(K 0.5 Na 0.5) 1−x Li x}(Nb 1−y Ta y) o3。该体系在正方和四方之间有一个向形态相边界（MPB）。MPB的最大压电d常数为{(K 0.5 Na 0.5) 0.97 Li 0.03}(Nb 0.8 Ta 0.2) o3，其压电驱动器常数d33为230 pm/V，是纯（K 0.5 Na 0.5）NbO 3 （KNN）的2.34倍。此外，它的压电耦合Kp值（0.505）、介电常数（1256）和弹性柔度（10.9 TPa−1）分别是纯KNN的1.51、2.93和1.14倍。介质损耗的长期稳定性远远优于纯KNN。
A new solid solution system, namely {(K 0.5 Na 0.5 ) 1− x Li x }(Nb 1− y Ta y )O 3 , with full density, a large piezoelectric constant and high stability has been developed. The system has a morphotropic phase boundary (MPB) between orthorhombic and tetragonal. The MPB gives the largest piezoelectric d constant at {(K 0.5 Na 0.5 ) 0.97 Li 0.03 }(Nb 0.8 Ta 0.2 )O 3 , which exhibits a piezoelectric actuator constant d 33 of 230 pm/V, 2.34 times that of pure (K 0.5 Na 0.5 )NbO 3 (KNN). Also, it gives a piezoelectric coupling Kp value (0.505), a dielectric constant (1256), and an elastic compliance (10.9 TPa−1 ) 1.51, 2.93, and 1.14 times those of pure KNN, respectively. The long-term stability of the dielectric loss was demonstrated to be far superior to that of pure KNN.