Author :
Yoo, Juhyun ; Lee, Sangho ; Hwang, Lakhoon ; Jeong, Yeongho ; Park, Durkwon
Abstract :
In this study, in order to develop the composition ceramics for low loss and low temperature sintering multilayer piezoelectric actuator, PMN-PNN-PZT ceramics were fabricated using Li2CO3 and Na2CO3 as sintering aids, and their piezoelectric and dielectric characteristics were investigated according to the amount of MnO2 addition. At the sintering temperature of 900 , density and mechanical quality factor (Qm) of specimen showed maximum value of 7.81[g/cm3], 1186 at 0.2wt% MnO2, electromechanical coupling factor (kp), piezoelectric constant (d33) of specimen showed the maximum value of 0.608, 377[pC/N] at 0.1 wt% MnO2 and dielectric constant (epsivr) slightly decreased with increasing MnO2. At the composition ceramics sintered at 900 C with 0.2 wt% MnO2, density, electromechanical coupling factor (kp), mechanical quality factor (Qm), dielectric constant (epsivr) and piezoelectric constant (d33) showed the optimum value of 7.81[g/cm3], 0.597, 1186, 919, 356[pC/N], respectively, for multilayer piezoelectric actuator application.
Keywords :
ceramics; piezoelectric actuators; sintering; Li2CO3; MnO2; Na2CO3; PMN-PNN-PZT ceramics; electromechanical coupling factor; low loss sintering; low temperature sintering; multilayer piezoelectric actuator; piezoelectric constant; Ceramics; Dielectric constant; Dielectric losses; Electronic mail; Instruments; Nonhomogeneous media; Piezoelectric actuators; Powders; Q factor; Temperature; electromechanical coupling factor; low loss multilayer piezoelectric actuator; low temperature sintering; mechanical quality factor; piezoelectric constant;
