BNKLT lead-free piezoelectric ceramics invented in authors' group were used for making middle frequency ceramic filters.

采用本组发明的BNKLT系无铅压电陶瓷，研制了中频陶瓷滤波器。

youdao

Also it introduces the features of BNT (Sodium bismuth titanate lead-free) replaced for traditional Piezoelectric ceramic speaker material (PZT) at last.

最后简单介绍了替代传统压电陶瓷扬声器材料(PZT)的无铅钛酸铋钠压电陶瓷扬声器(BNT)的材料特性。

youdao