Atmospheric controlled processing enabling highly textured NKN with enhanced piezoelectric performance

Lisheng Gao, Sinan Dursun, A. Erkan Gurdal, Eberhard Hennig, Shujun Zhang, Clive A. Randall

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


High-performance lead-free piezoelectrics are of interest as alternate materials to confront potential legislative actions on lifting the exemption on lead-based piezoelectric materials. In this work, we demonstrated a highly textured commercial-grade Li- and Ta- modified (Na, K)NbO3 (NKN) lead-free piezoceramic that was sintered under low oxygen partial pressure (pO2) atmospheres using the solid state template grain growth (TGG) method. It was found that a moderate low pO2 condition not only facilitated the reactive template grain growth but also lowered the temperature required for such process. Highly textured NKN with a converse piezoelectric coefficient d33 *≈680 pm V-1 was obtained, this remarkable piezoelectric property can be explained by the position of the polymorphic phase boundary of NKN. With considerations on both performance and cost, this work not only presented the potential for NKN to meet the requirement of commercial applications, but also provided an effective processing strategy to utilize low cost base metal inner electrodes in the future.

Original languageEnglish (US)
Pages (from-to)963-972
Number of pages10
JournalJournal of the European Ceramic Society
Issue number4
StatePublished - Apr 2019

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry


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