Abstract Nowadays, piezoelectric speakers have been actively studied for the applications to smartphone, TV monitor, and car audio system. Accordingly, for developing the piezoelectric speaker composition ceramics, in this paper, (Na,K,Li)(Nb,Sb)O3–(Bi,Na)ZrO3 ceramics with Rhombohedral-Tetragonal (R-T) region were fabricated with iron oxide addition, and their piezoelectric characteristics were investigated. When iron oxide was added to the ceramics, d33and kp were decreased. However, Qm was increased. At the NKN-BNZ ceramics with 0.1 wt% iron oxide. The piezoelectric constant d33, electromechanical coupling factor kp, and dielectric constant εr were optimized as 263[pC/N], 0.450, 1978, respectively, for piezoelectric speaker application.

中文翻译：

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压电扬声器用(Na, K, Li)(Nb,Sb)O3 –(Bi, Na)ZrO3陶瓷的显微结构、介电和压电性能

摘要 如今，压电扬声器已被积极研究用于智能手机、电视显示器和汽车音响系统的应用。因此，为了开发压电扬声器组合陶瓷，在本文中，添加了氧化铁，制造了具有菱形-四方 (RT) 区域的 (Na,K,Li)(Nb,Sb)O3–(Bi,Na)ZrO3 陶瓷，并对它们的压电特性进行了研究。当陶瓷中加入氧化铁时，d33 和kp 降低。但是，Qm 增加了。在 NKN-BNZ 陶瓷中含有 0.1 wt% 的氧化铁。对于压电扬声器应用，压电常数 d33、机电耦合系数 kp 和介电常数 εr 分别优化为 263[pC/N]、0.450、1978。