Title :
High Qm Lead Free Sodium Potassium Niobate Piezoelectric Ceramics and Middle Frequency Resonator
Author :
Chen, Qiang ; Chen, Lin ; Li, Qishou ; Shi, Xiaoluo ; Liu, Zhiqian ; Yue, Xi ; Xiao, Dingquan ; Zhu, Jianguo
Author_Institution :
Sichuan Univ., Chengdu
Abstract :
Density K4CuNb8O23 modified (Na0.5K0.5)NbO3 (NKN:KCN) ceramics with high mechanical quality factor Qm were synthesized by using conventional mixing oxide process. The maximum value of Qm of NKN:KCN ceramics reaches up to 1150, the planar electromechanical coefficient kp of NKN:KCN ceramics maintains a relative high level, which is about 40%. Moreover, the Curie temperature of NKN:KCN ceramics is above 380 . Based upon this kind of lead-free piezoelectric ceramics, a new type of lead-free middle frequency (455 kHz) ceramic resonators were designed and produced. This kind of lead-free ceramic resonator can be used in the remote controller.
Keywords :
Curie temperature; Q-factor; copper compounds; dielectric resonators; piezoceramics; piezoelectricity; potassium compounds; sodium compounds; (Na0.5K0.5)NbO3:K4CuNb8O23; Curie temperature; ceramic resonators design; conventional mixing oxide process; frequency 455 kHz; lead free sodium potassium niobate piezoelectric ceramics; mechanical quality factor; middle frequency resonator; planar electromechanical coefficient; remote controller; Ceramics; Environmentally friendly manufacturing techniques; Lead; Niobium compounds; Piezoelectric materials; Powders; Q factor; Resonance; Resonant frequency; Resonator filters;
Conference_Titel :
Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on
Conference_Location :
Nara
Print_ISBN :
978-1-4244-1334-8
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2007.4393359
