| Title |
Acoustic Properties of Electrostrictive Buzzer Using PZN-BT-PT Ceramics |
| Keywords |
경지변화 ; 전기기계결합계수 ; 유기압전d_{31}정수 ; 음압 ; 압전 ; 전왜 aging effect ; electromechanical coupling coefficient ; electric field induced charge coefficient d_{31} ; sound level ; piezoelectric ; electrostrictive |
| Abstract |
Piezoelectric Buzzer which has been generally used requires about 30kV/cm poling process and has the aging effects. In this study, 0.85 PZN - 0.10 BT - 0.05 PT system ceramics with additives of 0 - 2 wt% YS12TOS13T were fabricated and investigated on electromechanical coupling coefficient(kS1pT), electric field induced charge coefficient(dS131T), and sound level. As the results, in the 0.4 wt% YS12TOS13T added composition ceramics compared with the basic, kS1pT was increased from 0.355 to 0.39 and induced piezoelectric d constant increased from 204 to 220 x 10S0-12T (C/N) and sound level of electrostrictive Buzzer has the highest value of 71.5 dB under 8kV/cm bias electric field. |