(K0.5Na0.5)NbO3 based lead free piezoelectrics with expanded temperature usage range

Shujun Zhang, Jong Bong Lim, Hyeong Jae Lee, Ru Xia, Thomas R. Shrout

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Lead free materials 0.95(K0.5Na0.5)NbO 3-0.05LiSbO3 modified by CaTiO3 (CT) (1-3wt%) have been synthesized by conventional sintering. All samples exhibited pure perovskite phase with a tetragonal structure at room temperature. The Curie temperature was found to decrease with increasing CT addition in KNN-LS ceramics, while the orthorhombic to tetragaonl polymorphic phase transition was found to shift further downward from room temperature to lower than -50°C, expanding the temperature usage range. The piezoelectric coefficient d31 and electroemchanical coupling factor k31 for CT (1wt%) modified KNN-LS materials were found to be on the order of -90pC/N and -28.5% at room temperature, respectively, comparable to those values of pure KNN-LS. Together with its broadened temperature usage range, makes the CT modified materials promising candidates for sensor and transducer applications.

Original languageEnglish (US)
Title of host publication17th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2008
Volume2
DOIs
StatePublished - 2008
Event17th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2008 - Santa Fe, NM, United States
Duration: Feb 23 2008Feb 28 2008

Other

Other17th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2008
CountryUnited States
CitySanta Fe, NM
Period2/23/082/28/08

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Zhang, S., Lim, J. B., Lee, H. J., Xia, R., & Shrout, T. R. (2008). (K0.5Na0.5)NbO3 based lead free piezoelectrics with expanded temperature usage range. In 17th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2008 (Vol. 2). [4693820] https://doi.org/10.1109/ISAF.2008.4693820