Grain oriented Na0.5Bi0.5TiO3-BaTiO3 ceramics with giant strain response derived from single-crystalline Na0.5Bi0.5TiO3-BaTiO3 templates

Release time:2022-06-09

Impact Factor:4.495

DOI number:10.1016/j.jeurceramsoc.2015.12.025

Affiliation of Author(s):中南大学

Journal:Journal of the European Ceramic Society

Key Words:Single-crystalline NBT-7BT templates Grain orientation Excellent actuating performance

Abstract:Grain oriented lead-free piezoelectric 0.93Na0.5Bi0.5TiO3-0.07BaTiO3 (NBT-7BT) were fabricated by templated grain growth (TGG) method using single-crystalline NBT-7BT platelets with a morphotropical phase boundary (MPB) as templates. The NBT-7BT templates were synthesized by the topochemical technique, using Na0.5Bi4.5Ti4O15 (NBIT) platelets as precursors. The grain oriented NBT-7BT ceramics were textured with 10 wt% of NBT-7BT templates and sintered at 1175 °C for 5–50 h. The microstructure, strain behavior and temperature-dependent permittivity of lead-free NBT-7BT ceramics were systematically investigated. The strain responses of the grain oriented NBT-7BT ceramics were found to increase monotonously with the increase of the grain orientation degree. The NBT-7BT ceramic with 89% degree of grain orientation had an excellent actuating performance with up to 0.7% free strain at 7 kV/mm at room temperature, corresponding to a field-induced Smax/Emax of as high as 1000 pm/V.

First Author:C. Jiang

Indexed by:Journal paper

Discipline:Engineering

First-Level Discipline:Materials Science and Engineering

Document Type:J

Volume:36

Issue:3

Page Number:1377-1383

ISSN No.:0955-2219

Translation or Not:no

Date of Publication:2016-01-02

Included Journals:SCI