Correlation between impedance spectra of bulk ceramics and films with in-plane configuration
authors Ferreira, AAL; Abrantes, JCC; Frade, JR
nationality International
journal JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
author keywords Strontium titanate; Films; Impedance spectroscopy; In plane; Stray capacitance
keywords STRONTIUM-TITANATE CERAMICS; DOPED SRTIO3; SENSORS; CONDUCTIVITY; MODEL
abstract Strontium titanate is an interesting model electroceramics with grain boundary controlled properties. However, the relative role of grain boundaries may be significantly different in bulk ceramics and in films. Under oxidising conditions, impedance response of bulk ceramics can be described by series association of bulk and grain boundary contributions, which arc distinguished based on major differences in relaxation frequencies. This allows de-convolution over relatively wide temperature ranges with standard impedance meters. In this case, one finds reasonably good correlations between microstructural effects and grain boundary behaviour. However, one finds major differences between those spectra and corresponding impedance spectra obtained for in-plane measurements of films. This may be partially accounted for by major increase in the equivalent thickness/area ratio as well as microstructural changes. In addition, the substrate may affect the results by significant leakage, and by stray capacitance effects exerted by a combination of substrate and experimental equipment. (C) 2009 Elsevier Ltd. All rights reserved.
publisher ELSEVIER SCI LTD
issn 0955-2219
year published 2010
volume 30
issue 2
beginning page 221
ending page 225
digital object identifier (doi) 10.1016/j.jeurceramsoc.2009.06.017
web of science category Materials Science, Ceramics
subject category Materials Science
unique article identifier WOS:000272455600016
  ciceco authors
  impact metrics
journal analysis (jcr 2019):
journal impact factor 4.495
5 year journal impact factor 4.283
category normalized journal impact factor percentile 98.214
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg