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Structure and property of lead-free (K,Na)NbO3–(Bi1/2Na1/2)ZrO3–CaTiO3 piezoelectric ceramics

  • Nan Zhang
  • Jiagang WuEmail author
Article
  • 28 Downloads

Abstract

Simultaneous improvement of piezoelectricity and temperature stability is vital for developing high-performance KNN-based lead-free materials. Here, effects of CaTiO3 on phase structure, piezoelectricity and temperature stability of (1 – x)[0.95(K0.5Na0.5)NbO3–0.05(Bi0.5Na0.5)ZrO3]–xCaTiO3–0.2%MnO2 ceramics were studied. It was found that the orthorhombic-tetragonal phase transition temperature can be gradually decreased by increasing CaTiO3 content. Particularly, the improved strain temperature stability (strain varied < 15% when measurement temperature reaches 110 °C) and enhanced electrical properties (d33 ~ 296 pC/N and strain ~ 0.14%) can be observed in the ceramics with x = 0.02. Therefore, shifting the TO−T below room temperature is an effective way to promote temperature stability and electrical properties of KNN-based piezoelectric materials.

Notes

Acknowledgements

Authors gratefully acknowledge the supports of the National Science Foundation of China (NSFC No. 51722208 and 51332003). We thank Hui Wang for measuring the SEM patterns.

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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Materials ScienceSichuan UniversityChengduPeople’s Republic of China

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