Large size lead-free (Na,K)(Nb,Ta)O3 piezoelectric single crystal: Growth and full tensor properties

Limei Zheng, Xiaoqing Huo, Rui Wang, Junjun Wang, Wenhua Jiang, Wenwu Cao

Research output: Contribution to journalArticle

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Abstract

Environmental friendly piezoelectric single crystal, Ta-modified (K,Na)NbO3 with the size of 12 × 11 × 11 mm3, has been successfully grown using the top seeded solution growth technique. This orthorhombic phase (K,Na)(Nb,Ta)O3 single crystal is the largest size to date in KNN-based crystals with homogeneous composition. The large size allowed us to apply the domain engineering technique to further enhance its piezoelectric properties. In addition, a self-consistent complete set of elastic, dielectric and piezoelectric constants for the [001]c poled domain engineered crystal has been measured, which is urgently needed for theoretical studies and simulation designs of electromechanical devices using this lead-free piezoelectric material. The electromechanical coupling factors are very high (k33 = 0.827, kt = 0.646) and the dielectric loss tangent is as low as 0.004 for this lead-free piezoelectric crystal. Such excellent properties make this crystal an excellent candidate to replace lead-containing piezoelectric materials in electromechanical devices.

Original languageEnglish (US)
Pages (from-to)7718-7722
Number of pages5
JournalCrystEngComm
Volume15
Issue number38
DOIs
StatePublished - Oct 14 2013

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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