中国物理B ›› 2025, Vol. 34 ›› Issue (4): 47701-047701.doi: 10.1088/1674-1056/adb25e
High-performance KNN-based piezoelectric ceramics for buzzer application
Cheng Xiong(熊城)1, Bosen Li(李博森)1, Zhongxin Liao(廖忠新)2, Yan Qiu(邱䶮)2, and Daqiang Gao(高大强)1,†
- 1 School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China;
2 The Audiowell Electronics (Guangdong) Co., Ltd., Guangzhou 511493, China
High-performance KNN-based piezoelectric ceramics for buzzer application
Cheng Xiong(熊城)1, Bosen Li(李博森)1, Zhongxin Liao(廖忠新)2, Yan Qiu(邱䶮)2, and Daqiang Gao(高大强)1,†
- 1 School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China;
2 The Audiowell Electronics (Guangdong) Co., Ltd., Guangzhou 511493, China
摘要： Piezoelectric ceramic materials are important components of piezoelectric buzzers, where the parameter of inverse piezoelectric coefficient ($d_{33}^{\ast }$) plays a decisive role in the performance of the buzzer. Here, we report the manufacture and performance of a lead-free ceramic-based (0.96(K$_{0.5}$Na$_{0.5}$)(Nb$_{0.96}$Sb$_{0.04}$)O$_{3}$-0.04(Bi$_{0.5}$Na$_{0.5}$)ZrO$_{3}$-1 mol% Al$_{2}$O$_{3}$, abbreviated as KNNS-BNZ-1 mol% Al$_{2}$O$_{3}$) piezoelectric buzzer and compare it with commercial (PbZr$_{0.5}$Ti$_{0.5}$O$_{3}$, abbreviated as PZT) ceramics. Briefly, KNN-based ceramics have a typical perovskite structure and piezoelectric properties of $d_{33}=480 $ pC/N, $k_{\rm p}=0.62$ and $d_{33}^{\ast }=830 $ pm/V, compared to $d_{33}=500 $ pC/N, $k_{\rm p}=0.6$ and $d_{33}^{\ast}=918 $ pm/V of the commercial PZT-4 ceramics. Our results show that the KNNS-BNZ-1 mol% Al$_{2}$O$_{3}$ ceramics have a similar sound pressure level performance over the testing frequency range to commercial PZT ceramics (which is even better in the 3-4 kHz range). These findings highlight the great application potential of KNN-based piezoelectric ceramics.
中图分类号: (Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)
- 77.84.-s