Lead-free electrostrictive bismuth perovskite ceramics with thermally stable field-induced strains

Electric field-induced strain (EFIS) properties of Bi 1/2(Na 0.82K 0.18) 1/2TiO 3 (BNKT) ceramics modified with Sr(K 1/4Nb 3/4)O 3 (SKN) have been investigated as functions of composition and temperature. BNKT ceramics near a phase boundary revealed the coexistence of ferroelectric rhombohedral and...

Full description

Saved in:
Bibliographic Details
Published in:Materials letters 2011-09, Vol.65 (17), p.2607-2609
Main Authors: Tran, Vu Diem Ngoc, Han, Hyoung-Su, Yoon, Chang-Ho, Lee, Jae-Shin, Jo, Wook, Rödel, Jürgen
Format: Article
Language:English
Subjects:
Bismuth
Ceramics
Electrostriction
Ferroelectric materials
Ferroelectricity
Ferroelectrics
lead
ozone
Perovskites
Phase boundaries
Piezoelectric materials
Strain
strontium
temperature
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Electric field-induced strain (EFIS) properties of Bi 1/2(Na 0.82K 0.18) 1/2TiO 3 (BNKT) ceramics modified with Sr(K 1/4Nb 3/4)O 3 (SKN) have been investigated as functions of composition and temperature. BNKT ceramics near a phase boundary revealed the coexistence of ferroelectric rhombohedral and tetragonal phases, resulting in a typical ferroelectric butterfly-shaped bipolar S– E loop at room temperature, whose normalized strain ( S max/ E max) showed a significant temperature coefficient of 0.38 pm/V/K. However, 5 mol% SKN-modified BNKT ceramics revealed a typical electrostrictive behaviour with a thermally stable electrostrictive coefficient, Q 33 = 0.021 m 4/C 2, which is almost comparable to that of Pb(Mg 1/3Nb 2/3)O 3 (PMN) ceramics that have been dominantly used as Pb-based electrostrictive materials over the last decades.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2011.05.059