Low-temperature sintered Pb(Zr,Ti)O3-Pb(Mn,Sb)O3-Pb(Zn,Nb)O3 for multilayer ceramic actuators

Title
Low-temperature sintered Pb(Zr,Ti)O3-Pb(Mn,Sb)O3-Pb(Zn,Nb)O3 for multilayer ceramic actuators
Authors
Dandan WanQian Li최주영최지원Ying Yang윤석진
Keywords
Low temperature sintering; Multilayer ceramic actuators; Piezoelectrics
Issue Date
2010-07
Publisher
Japanese Journal of Applied Physics, Part 1- Regular Papers
Citation
VOL 49, NO 7, 071503-1-071503-6
Abstract
A quaternary 0.90Pb(Zr0.48Ti0.52)O3–0.05Pb(Mn1/3Sb2/3)O3–0.05Pb(Zn1/3Nb2/3)O3 (0.90PZT–0.05PMS–0.05PZN) piezoelectric ceramic was synthesized by a conventional method, and CuO was adopted to lower its sintering temperature. The crystal structure, micromorphology, and electrical properties were studied in terms of CuO content. The results indicate that 1.0 wt% CuO addition significantly improves the sinterability of 0.90PZT–0.05PMS–0.05PZN ceramics, lowering the sintering temperature to 900℃ and maintaining moderate electrical properties. d33 = 306 pC/N, Qm = 997, kp = 53.6%, tan δ = 0.50%, and "T 33/"0 = 1350. The low-temperature sintering behavior could be explained by the formation of a transient liquid phase by CuO during sintering. Moreover, the endothermic peak at about 950℃C in the differential thermal analysis (DTA) curve of the raw ceramic powder provides further evidence of an amorphous phase. To obtain better piezoelectric properties, La2O3 was selected as the donor dopant for the 0.90PZT–0.05PMS–0.05PZN + 1.0 wt% CuO system. Our study demonstrates that La2O3 is very effective in improving piezoelectric properties, markedly increasing d33 and kp without decreasing Qm. Finally, 0.5 wt% La2O3 added 0.90PZT–0.05PMS– 0.05PZN + 1.0 wt% CuO ceramics show excellent electrical properties. d33 = 355 pC/N, Qm = 936, kp = 58.4%, tanδ = 0.32%, and "T 33/"0 = 1590, which are quite suitable for multilayer piezoelectric ceramic actuators.
URI
http://pubs.kist.re.kr/handle/201004/38756
ISSN
0021-4922
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