Large piezoelectric properties in KNN-based lead-free single crystals grown by a seed-free solid-state crystal growth method

Jie Yang, Faqiang Zhang, Qunbao Yang, Zhifu Liu, Yongxiang Li, Yun Liu, Qiming Zhang

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    Abstract

    We report lead-free single crystals with a nominal formula of (K0.45Na0.55)0.96Li0.04NbO3 grown using a simple low-cost seed-free solid-state crystal growth method (SFSSCG). The crystals thus prepared can reach maximum dimensions of 6 mm × 5 mm × 2 mm and exhibit a large piezoelectric coefficient d33 of 689 pC/N. Moreover, the effective piezoelectric coefficient d 33∗, obtained under a unipolar electric field of 30 kV/cm, can reach 967 pm/V. The large piezoelectric response plus the high Curie temperature (TC) of 432 °C indicate that SFSSCG is an effective approach to synthesize high-performance lead-free piezoelectric single crystals.

    Original languageEnglish (US)
    Article number182904
    JournalApplied Physics Letters
    Volume108
    Issue number18
    DOIs
    StatePublished - May 2 2016

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    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy (miscellaneous)

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