Year: 2012
Type: article
Abstract: The four-layer Aurivillius compound SrBi 4− x Dy x Ti 4 O 15 ( x = 0.02 − 0.1) was synthesized by using a solid state sintering method. X-ray diffraction (XRD) analysis revealed that the dysprosium-substituted SrBi 4 Ti 4 O 15 ceramics have a pure four-layer Aurivillius-type structure. The lattice parameters and densities were calculated with XRD studies. The experimental densities obtained were about 95% that of theoretical values. The effects of dysprosium oxide on the microstructure, ferroelectric, dielectric and piezoelectric properties of the ceramics were investigated. The dielectric constant of Dy-doped samples was found to decrease with increasing Dy content. At x = 0.06, the piezoelectric charge coefficient ( d 33 ) and the electromechanical coupling factor ( k p ) were found to be maximum.
Source: Physica Scripta
Authors: B Mamatha, K Ashok, A R James, P Sarah
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1601639740