Effect of phosphorus additions on the sintering and transport properties of proton conducting BaZr(0.85)Y(0.15)O3-delta
authors Soares, HS; Zhang, X; Antunes, I; Frade, JR; Mather, GC; Fagg, DP
nationality International
journal JOURNAL OF SOLID STATE CHEMISTRY
author keywords BZY; Ceramic proton conductor; Dispersants; Sintering aids; Phosphate esters; Barium zirconate
keywords DOPED BARIUM ZIRCONATE; OXIDE FUEL-CELLS; PHOSPHATE ESTER; THIN-FILMS; BATIO3; ELECTROLYTE; MICROSTRUCTURE; DISPERSION; CERAMICS; TITANATE
abstract The influence of phosphorous additions on the sintering and electrical transport properties of the proton-conducting perovskite BaZr0.85Y0.15O3-delta (BZY) has been studied with a view to the use of phosphates as typical dispersants for the formation of stabilised solid suspensions or as possible sintering aids. P2O5 additions, (1-x)BZY.xP(2)O(5), monotonously promote densification in the intermediate compositional range 0.04 <= x <= 0.08. Nonetheless, BZY reacts with phosphorous forming the phase Ba-3(PO4)(2) at temperatures as low as 600 degrees C. The associated loss of Ba from the perovskite, leads to a decrease in the perovskite lattice parameter, the formation of yttria-based impurity phases and impaired grain growth. Such reaction has an extremely detrimental effect on bulk and grain boundary conductivities. It is, therefore, vital that the current results are taken into account by the protonics community when attempting to prepare the stabilised solid suspensions of BZY nanopowders required for thin ceramic applications. Alternative dispersants to phosphate esters must be found. (C) 2012 Elsevier Inc. All rights reserved.
publisher ACADEMIC PRESS INC ELSEVIER SCIENCE
issn 0022-4596
year published 2012
volume 191
beginning page 27
ending page 32
digital object identifier (doi) 10.1016/j.jssc.2012.02.053
web of science category Chemistry, Inorganic & Nuclear; Chemistry, Physical
subject category Chemistry
unique article identifier WOS:000305670700005
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 2.179
5 year journal impact factor 2.130
category normalized journal impact factor percentile 53.605
dimensions (citation analysis):
altmetrics (social interaction):



 


Apoio

1suponsers_list_ciceco.jpg