Microstructural, piezoelectric properties and temperature stability in Li-0.02(Na0.55K0.45)(0.98)[(Nb0.77Ta0.18Sb0.05)(1-) Cu-2x/5(x)]O-3 ceramics for piezoelectric actuator

作者：Oh Youngkwang; Yoo Juhyun^*

来源：Materials Letters, 2012, 79: 180-183.

DOI：10.1016/j.matlet.2012.04.010

• Lead-free piezoelectric ceramics
• Temperature stability
• Cu substitution

In this study, Li-0.02(Na0.55K0.45)(0.98)[(Nb0.77Ta0.18Sb0.05)(1 -) Cu-2x/5(x)]O-3 (LNKNTS-x Cu) piezoelectric ceramics with x = 0-0.015 were fabricated by conventional solid-state reaction method. The temperature stability of k(p) was investigated. At the sintering temperature of 1120 degrees C and 0.6 mol% Cu content, the optimum values of density = 4.808 g/cm(3), k(p) = 0.446, Q(m) = 109, epsilon(r) = 1359 and d(33) = 254 pC/N, were obtained, respectively. Taking into consideration above physical properties, it is considered that this composition is applicable to lead-free haptic piezoelectric actuators with good temperature stability in the temperature range of -20 to 80 degrees C.

• 出版日期2012-7-15