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Detailed Program
Paper Number : PI-O06
Time Frame : 14:34~14:46
Presentation Date : Thurseday, 27, November
Session Name : Piezoelectric Materials, Devices & Applications
Session Chair 1# : Miso Kim
Session Chair 2# : Takeshi Morita
Piezoelectric Multi-layer Ceramics for Haptic Actuator
In-Tae Seo
Korea University
For the development of future piezoelectric actuator x mol% CuO added PZT-PZNN [CxPZT-PZNN] ceramics was investigated. The dielectric constant of CxPZT-PZNN ceramics could be controlled by CuO addition and sintering temperature. At the critical size of grain, the ceramic showed minimum dielectric constant. The piezoelectric properties such as d33, kp and Qm were independent of grain size. Maximum strain of C0.5PZT-PZNN ceramics was 0.151% at 3kV and it also showed a high strain of 0.014% at 110V which is haptic operation voltage. Moreover, C0.5PZT-PZNN ceramics had excellent fatigue property and their strain behavior was maintained during 106 cycle. Therefore, C0.5PZT-PZNN ceramic sintered at 900oC are suitable for piezoelectric vibration actuator because of their high piezoelectric properties and low dielectric constant. The 3-layers C0.5PZT-PZNN MLCs were well fabricated with Ag electrode using tape casting method. And using 3-layers C0.5PZT-PZNN MLC, the piezoelectric vibration actuator was well produced and it showed high vibration acceleration of 2.1G at the resonance frequency of 210 Hz. Moreover, because the capacitance of C0.5PZT-PZNN MLC actuator was very low (20nF) than that of commercial actuator, it is expected that the power consumption of piezoelectric vibration actuator using C0.5PZT-PZNN MLC will be minimized. Therefore, the C0.5PZT-PZNN ceramics is a good candidate for multi-layer piezoelectric actuator and piezoelectric vibration actuator using C0.5PZT-PZNN MLC is suitable for haptic devices for portable components.
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