| Title |
The Characteristics of PZ-PT-PWN Piezoelectric Ceramics for Application to High Power Device |
| Authors |
정수현(Jeong, Su-Hyeon) ; 홍종국(Hong, Jong-Guk) ; 이종섭(Lee, Jong-Seop) ; 채홍인(Chae, Hong-In) ; 윤만순(Yun, Man-Sun) ; 임기조(Im, Gi-Jo) |
| Keywords |
piezoelectric ceramics ; piezoelectric transformer ; electromechanical coupling factor ; mechanical quality factor ; pyrochlore phase |
| Abstract |
The piezoelectric properties and the doping effect for0.95Pb(Zr_xTi_{1-x})O_3+0.05Pb(Mn1/3Nb2/3)O_3 compositions were studied. Also, the heat generation and the change of electromechanical characteristics, the important problem in practical usage, were investigated under high electric field driving. As a experiment results under low electric field, the values of kp and ε33T were maximized, but Qm was minimized(Kp=0.57, Qm=1550) in the composition of x=0.51. In order to increase the values of Qm Nb_2O_5 was used as a dopant. As the result of that, the grain size was suppressed and the uniformity of grain was improved. Also, the values of kp decreased, and the values of Qm increased with doping concentration of Nb_2O_5. As a experiment results under high electric field driving, when vibration velocity was lower than 0.6[m/s], the temperature increase was 20[°C], and the change ratio of mechanical quality factor was less than 10[%]. So, its electromechanical characteristics was very stable. Conclusively, piezoelectric ceramic composition investigated at this paper is suitable for application to high power piezoelectric devices. |