Effect of thermal annealing on crystal structures and electrical properties in BaTiO3 ceramics

Mechanical damage and stress caused by polishing and cutting of ferroelectric materials could deteriorate their dielectric, ferroelectric, and piezoelectric properties. BaTiO3 piezoelectric ceramics were polished and cut, and thermally annealed at 600, 800, 1000, and 1200 °C for recovery. The electr...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied physics 2018-07, Vol.124 (3)
Main Authors: Khanal, Gopal Prasad, Kim, Sangwook, Fujii, Ichiro, Ueno, Shintaro, Moriyoshi, Chikako, Kuroiwa, Yoshihiro, Wada, Satoshi
Format: Article
Language:English
Subjects:
Annealing
Applied physics
Barium titanates
Coercivity
Crystal structure
Crystals
Dielectric properties
Electrical measurement
Electrical properties
Ferroelectric materials
Ferroelectricity
Microstrain
Piezoelectric ceramics
Piezoelectricity
Radioactivity
Residual stress
Structural damage
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:Mechanical damage and stress caused by polishing and cutting of ferroelectric materials could deteriorate their dielectric, ferroelectric, and piezoelectric properties. BaTiO3 piezoelectric ceramics were polished and cut, and thermally annealed at 600, 800, 1000, and 1200 °C for recovery. The electrical measurements revealed a reduction in the coercive field, elimination of imprint behavior, and an increase in saturation polarization in the thermally annealed ceramics. Furthermore, the electromechanical properties measured by the resonance method, prior to thermal annealing were d33 = 184 pC/N, k33 = 0.36, and s33E = 10.9 × 10−12 m2/N, while the values after 1200 °C-4 h thermal annealing were d33 = 287 pC/N, k33 = 0.54, and s33E = 12.1 × 10−12 m2/N. The in situ crystal structure evaluation and Williamson-Hall analysis suggested the decrement of microstrain from 6.38 × 10−4 to 5.20 × 10−4, indicating the retrieval of the residual stress imposed. The enhancement of piezoelectricity by 56% was ascribed to the effective annealing out of the surface mechanical damaged layers.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.5023814