Hot-stage transmission electron microscopy study of (Na, K)NbO3based lead-free piezoceramics

Shengbo Lu, Zhengkui Xu, Kin Wing Kwok, Helen L.W. Chan

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11 Citations (Scopus)

Abstract

Hierarchical nanodomains assembled into micron-sized stripe domains, which is believed to be associated with outstanding piezoelectric properties, were observed at room temperature in a typical lead free piezoceramics, (Na0.52K0.48-x)(Nb0.95-xTa0.05)- xLiSbO3, with finely tuned polymorphic phase boundaries (x=0.0465) by transmission electron microscopy. The evolution of domain morphology and crystal structure under heating and cooling cycles in the ceramic was investigated by in-situ hot stage study. It is found that the nanodomains are irreversibly transformed into micron-sized rectangular domains during heating and cooling cycles, which lead to the thermal instability of piezoelectric properties of the materials.
Original languageEnglish
Article number042904
JournalApplied Physics Letters
Volume105
Issue number4
DOIs
Publication statusPublished - 28 Jul 2014

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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