Journal of Electroceramics

, Volume 42, Issue 1–2, pp 74–78 | Cite as

Effect of SmAlO3 doping on the properties of (1-x)(K0.44Na0.52Li0.04)(Nb0.91Ta0.05Sb0.04)O3 lead-free ceramics

  • Yan Zhao
  • Dongdong Wei
  • Juan DuEmail author
  • Zhijun XuEmail author


(1-x)(K0.44Na0.52Li0.04)(Nb0.91Ta0.05Sb0.04)O3-xSmAlO3 (abbreviated as KNLNTS-xSA) (x = 0.000, 0.001, 0.004 and 0.008) lead-free ceramics were prepared by conventional solid-state sintering method and the effects of SA on the phase structure and electrical properties of the ceramics were systematically studied. The XRD analysis results show that all compositions had a pure perovskite structure at the optimum sintering temperature. Enhanced electrical properties were obtained with x = 0.004: d33 = 144 pC/N, εr = 970, TC = 323 °C, TO-T = 71 °C, Pr = 16 μC/cm2, and EC = 14.9 kV/cm at the sintering temperature of 1180 °C, providing a better method to obtain high-performance potassium-sodium-niobate materials.


Lead-free Piezoelectric ceramics Phase structure Electrical properties 



This work was supported by the National High Technology Research and Development Program of China (NO.2016YFB0402701), National Natural Science Foundation of China (No. 51372110, 51302124), Independent innovation and achievement transformation in Shandong Province special, China (No. 2014CGZH0904).


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Authors and Affiliations

  1. 1.College of Materials Science and EngineeringLiaocheng UniversityLiaochengChina
  2. 2.School of Environmental and Materials EngineeringYantai UniversityYantaiChina

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