An approach to further improve piezoelectric properties of (K0.5Na0.5)NbO3-based lead-free ceramics

作者：Du Hongliang^*; Zhou Wancheng; Luo Fa; Zhu Dongmei; Qu Shaobo; Pei Zhibin

来源：Applied Physics Letters, 2007, 91(20): 202907.

DOI：10.1063/1.2815750

An approach to further improve piezoelectric properties of (1-x)(K0.5Na0.5)NbO3-xLiNbO(3) (KNLN) ceramics, i.e., the optimum poling temperatures (T-p) of KNLN ceramics should be chosen near the polymorphic phase transition temperatures, is proposed. This is contrary to conventional wisdom associated with electrical poling of ceramics. Piezoelectric constant d(33) of KNLN (x=0.07) ceramics increases from 210 to 274 pC/N by selecting optimum T-p. This result indicates that this approach is very effective in improving piezoelectric properties of KNLN ceramics. Moreover, this approach can also be applied to other (K0.5Na0.5)NbO3 based ceramics.

• 出版日期2007-11-12
• 单位西北工业大学; 中国人民解放军空军工程大学; 西安交通大学