Core-shell grain structures and ferroelectric properties of Na0.5K0.5NbO3-LiTaO3-BiScO3 piezoelectric ceramics

Fangyuan Zhu; Michael B Ward; Jing-Feng Li; Steven J Milne

doi:10.1016/j.dib.2015.04.002

Core-shell grain structures and ferroelectric properties of Na0.5K0.5NbO3-LiTaO3-BiScO3 piezoelectric ceramics

Data Brief. 2015 Apr 20:4:34-9. doi: 10.1016/j.dib.2015.04.002. eCollection 2015 Sep.

Authors

Fangyuan Zhu¹, Michael B Ward², Jing-Feng Li³, Steven J Milne²

Affiliations

¹ State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China ; Institute for Materials Research, University of Leeds, Leeds LS2 9JT, UK.
² Institute for Materials Research, University of Leeds, Leeds LS2 9JT, UK.
³ State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.

Abstract

Legislation arising from health and environmental concerns has intensified research into finding suitable alternatives to lead-based piezoceramics. Recently, solid solutions based on sodium potassium niobate (K,Na)NbO3 (KNN) have become one of the globally-important lead-free counterparts, due to their favourable dielectric and piezoelectric properties. This data article provides information on the ferroelectric properties and core-shell grain structures for the system, (1-y)[(1-x)Na0.5K0.5NbO3 - xLiTaO3] - yBiScO3 (x=0-0.1, y=0.02, abbreviated as KNN-xLT-2BS). We show elemental analysis with aid of TEM spot-EDX to identify three-type grain-types in the KNN-LT-BS ternary system. Melting behaviour has been assessed using a tube furnace with build-in camera. Details for the ferroelectric properties and core-shell chemical segregation are illustrated.

Keywords: Core–shell structure; Ferroelectric; Lead-free; Melting; NKN-based; TEM.