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
Abstract Piezoelectric ceramic materials are important components of piezoelectric buzzers, where the parameter of inverse piezoelectric coefficient () 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(KNa)(NbSb)O-0.04(BiNa)ZrO-1 mol{\%} AlO, abbreviated as KNNS-BNZ-1 mol{\%} AlO) piezoelectric buzzer and compare it with commercial (PbZrTiO, abbreviated as PZT) ceramics. Briefly, KNN-based ceramics have a typical perovskite structure and piezoelectric properties of pC/N, and pm/V, compared to pC/N, and pm/V of the commercial PZT-4 ceramics. Our results show that the KNNS-BNZ-1 mol{\%} AlO 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.
Fund: Project supported by the Key Research and Develop Projects in Gansu Province (Grant No. 23YFGA0002) and the project funding of Audiowell Electronics (Guangdong) Co., Ltd.
Cheng Xiong(熊城), Bosen Li(李博森), Zhongxin Liao(廖忠新), Yan Qiu(邱䶮), and Daqiang Gao(高大强) High-performance KNN-based piezoelectric ceramics for buzzer application 2025 Chin. Phys. B 34 047701
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