Structural, microstructural, ferroelectric and photoluminescent properties of praseodymium modified Ba0.98Ca0.02Zr0.02Ti0.98O3 ceramics
authors Ramovatar; Coondoo, I; Satapathy, S; Panwar, N
nationality International
journal CERAMICS INTERNATIONAL
author keywords Lead free ceramics; Ferroelectric properties; Photoluminescence
keywords FREE PIEZOELECTRIC CERAMICS; ELECTRICAL-PROPERTIES; SINTERING TEMPERATURE; LUMINESCENCE; POLARIZATION; EMISSION; STATE
abstract The 'x' wt% (x = 0, 0.02, 0.04 and 0.06) Pr6O11 modified Ba0.98Ca0.02Zr0.02Ti0.98O3 (BCZT - x Pr) piezoelectric ceramics have been fabricated by the solid state reaction method with sintering at 145 degrees C (x = 0) and 1350 degrees C (0.02 <= x <= 0.06) for 2 h. The impact of Pr concentration on the structural, microstructural, photoluminescence and ferroelectric properties has been systematically investigated. The x-ray diffraction (XRD) patterns revealed the co-existence of tetragonal and orthorhombic phases at room temperature upto x = 0.04 Pr concentration. The grain size was found to decrease upto x = 0.04 Pr content. Room temperature Raman spectroscopy results were consistent with the XRD results. The photoluminescence (PL) spectra showed significant emissions consisting of strong blue (489 nm), green (528 nm) and red (649 nm) wavelengths. The emission intensities of PL spectrum were strongly Pr concentration dependent and a maximum value was obtained for 0.04 Pr modified BCZT ceramic. Further, a large remnant polarization (2P(r) similar to 13 mu C/cm(2)) and low coercive field (E-c similar to 22 V/cm) were obtained for BCZT - 0.04 Pr ceramic. The crystal structure and microstructure affect the photoluminescence and ferroelectric properties. Such properties of 0.04 Pr modified BCZT ceramic make it the potential candidate for novel integrated and multifunctional devices.
publisher ELSEVIER SCI LTD
issn 0272-8842
year published 2018
volume 44
issue 2
beginning page 1690
ending page 1698
digital object identifier (doi) 10.1016/j.ceramint.2017.10.097
web of science category Materials Science, Ceramics
subject category Materials Science
unique article identifier WOS:000418211600061
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 3.057
5 year journal impact factor 2.882
category normalized journal impact factor percentile 94.444
dimensions (citation analysis):
altmetrics (social interaction):



 


Apoio

1suponsers_list_ciceco.jpg