Electrical Properties Of (Na,K,Li)(Nb,Sb,Ta)O-3 Ceramics For Multilayer-Type Piezoelectric Actuator
FERROELECTRICS(2017)
摘要
In this study, lead free CuO added (Na0.525K0.4425Li0.0375)(Nb0.8975Sb0.065 Ta-0.0375)O-3 ceramics (NKL-NST) and multilayer actuator using the ceramics were fabricated and their physical and displacement properties investigated. The excellent physical properties of electromechanical coupling factor (k(p)) D 0.4159, piezoelectric constant (d(33)) D 166pC/N and mechanical quality factor (Q(m)) = 322 were obtained from the 2.5mol% CuO doped (Na0.525K0.4425Li0.0375) (Nb0.8975Sb0.065Ta0.0375)O-3 ceramics sintered at low temperature of 1,000 degrees C for 3 h.The multilayer-type piezoelectric actuators (abbreviated as MTPA) were fabricated with NKL-NST C 2.5mol% CuO ceramics with excellent piezoelectric properties by tape casting methods. The density and effective electromechanical coupling factor (k(eff)) of manufactured haptic piezoelectric actuator were 4.4 g/cm(3) and 0.225, respectively. Total-displacement of central part of the actuator was increased with increasing input voltage. With input voltage and driving frequency of 20 V and 420 Hz, the input current, consumption of electrical power and total-displacement under zero force were 324 mu A, 5.405 mW and 36 mm, respectively. Whereas, under 2.8 g force, the input current was 358 mA, and electrical power consumption of 4.554 mW and total-displacement of 18 mm under 20 V and150 Hz appeared, respectively.
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关键词
Multilayer-type, piezoelectric actuators, displacement, effective electromechanical coupling factor
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