Bulk dense fine-grain (1-x)BiScO3–xPbTiO3 ceramics with high piezoelectric coefficient

Loading...
Thumbnail Image
Penn collection
Departmental Papers (MSE)
Degree type
Discipline
Subject
bismuth compounds
dielectric polarisations
electric domains
ferroelectric ceramics
ferroelectric transmissions
grain size
lead compounds
piezoceramics
piezoelectricity
scanning probe microscopy
sintering
Funder
Grant number
License
Copyright date
Distributor
Related resources
Author
Zou, Tingting
Wang, Xiaohui
Wang, Han
Zhong, Caifu
Li, Longtu
Contributor
Abstract

High density fine grain (1−x)BiScO3–xPbTiO3 ceramics were successfully prepared by two-step sintering and their ferroelectric properties were investigated. Experimental evidence indicates the existence of a morphotropic phase boundary at the composition zx=0.635, which exhibits a piezoelectric coefficient d33 of 700 pC/N at room temperature, significantly higher than the reported values to date. Furthermore, a higher electromechanical coupling factor Kp=0.632 and a larger remnant polarization Pr=47.3 µC/cm2 were obtained. The paraelectric-to-ferroelectric phase transition occurs at 446 °C, slightly lower than in the coarse grain ceramics with a similar composition, suggesting a grain size effect. The local effective piezoelectric coefficient d33* was estimated to be 795 pC/N at 2.29 V, measured by scanning probe microscopy. Further atomic force microscope observation revealed the existence of 90° domains of about 60–70 nm in width, confirming the previous results that small domain structure enhances the piezoelectric properties.

Advisor
Date Range for Data Collection (Start Date)
Date Range for Data Collection (End Date)
Digital Object Identifier
Series name and number
Publication date
2008-11-13
Journal title
Volume number
Issue number
Publisher
Publisher DOI
Journal Issue
Comments
© 2008 American Institute of Physics. Reprinted from Applied Physics Letters, Volume 93, Issue 19, November 13, 2008, Article 192913. Publisher URL: http://dx.doi.org/10.1063/1.2995861
Recommended citation
Collection