Electrical properties of (1−x)(Bi0.5Na0.5)TiO3–xKNbO3 lead-free ceramics

In this investigation, a simple compound (1−x)(Bi0.5Na0.5)TiO3–xKNbO3 (BNT–xKN, x=0–0.08) lead-free ceramics were synthesized successfully by conventional solid state reaction method. The piezoelectric, dielectric and ferroelectric characteristics of the ceramics were investigated and discussed. The...

Full description

Saved in:
Bibliographic Details
Published in:Journal of solid state chemistry 2014-05, Vol.213, p.72-78
Main Authors: Jiang, Xijie, Wang, Baoyin, Luo, Laihui, Li, Weiping, Zhou, Jun, Chen, Hongbing
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Depolarization
Dielectric
Dielectric, piezoelectric, ferroelectric and antiferroelectric materials
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
Lead-free ceramic
Physics
Piezoelectric
Strain
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:In this investigation, a simple compound (1−x)(Bi0.5Na0.5)TiO3–xKNbO3 (BNT–xKN, x=0–0.08) lead-free ceramics were synthesized successfully by conventional solid state reaction method. The piezoelectric, dielectric and ferroelectric characteristics of the ceramics were investigated and discussed. The results shows that moderate KN addition can enhance the piezoelectric response without an obvious decline of ferroelectric properties. The largest piezoelectric response is obtained in BNT–0.05KN, whereas largest electric-field-induced strain is obtained in BNT–0.06KN. An effective d33eff of ~400 pC/N calculated from electric-field-induced strain is obtained in BNT–0.06KN. The present investigation demonstrates that addition KN effectively reduces the depolarization temperature of the BNT–xKN ceramics. The electrical properties of the ceramics are tightly related to their depolarization temperature. Unipolar electric-field-induced strain for the BNT–xKN ceramics. A maximum strain of 0.28% is achieved with a low field in BNT–0.06KN. [Display omitted] •Moderate KNbO3 addition enhances the piezoelectric properties of the ceramics.•A maximum strain of 0.28% is achieved with a low field.•A large piezoelectric response is achieved in 0.95(Bi0.5Na0.5)TiO3–0.05KNbO3.•The electrical properties are tightly related to the depolarization temperature Td.
ISSN:0022-4596
1095-726X
DOI:10.1016/j.jssc.2014.01.022