High-performance KNN-based piezoelectric ceramics for buzzer application  

作　　者：Cheng Xiong Bosen Li Zhongxin Liao Yan Qiu Daqiang Gao 熊城;李博森;廖忠新;邱䶮;高大强

机构地区：[1]School of Physical Science and Technology,Lanzhou University,Lanzhou 730000,China [2]The Audiowell Electronics(Guangdong)Co.,Ltd.,Guangzhou 511493,China

出　　处：《Chinese Physics B》2025年第4期591-596,共6页中国物理B(英文版)

基　　金：Project supported by the Key Research and Develop Projects in Gansu Province(Grant No.23YFGA0002);the project funding of Audiowell Electronics(Guangdong)Co.,Ltd.

摘　　要：Piezoelectric ceramic materials are important components of piezoelectric buzzers,where the parameter of inverse piezoelectric coefficient(d_(33)^(*))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_(p)=0.62 and d_(33)^(*)=830 pm/V,compared to d_(33)=500 pC/N,k_(p)=0.6 and d_(33)^(*)=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.

关 键 词：lead-free piezoelectric ceramics phase structure engineering BUZZER ATOMIZER 

分 类 号：TQ174.1[化学工程—陶瓷工业]