On the electrochemical properties of Mg-PSZ: an overview
authors Rondao, AIB; Muccillo, ENS; Muccillo, R; Marques, FMB
nationality International
journal JOURNAL OF APPLIED ELECTROCHEMISTRY
author keywords Mg-PSZ; Zirconia; Oxygen sensors; Ionic conductivity; Electronic conductivity
keywords PARTIALLY-STABILIZED ZIRCONIA; ELECTRONIC CONDUCTIVITY LIMITS; OXIDE FUEL-CELLS; SOLID ELECTROLYTES; HIGH-TEMPERATURE; ELECTRICAL-CONDUCTIVITY; OXYGEN SENSORS; TETRAGONAL PHASE; DEFECT STRUCTURE; STEEL MELTS
abstract MgO-doped partially stabilized zirconia is a complex ceramic electrolyte in which all properties, phase composition, and microstructure are strongly influenced by thermal history besides chemical composition. The electrochemical performance of this ceramic used in oxygen sensors for molten steel is reviewed here. A wide collection of data on electrical properties obtained at various temperatures (up to 1600 degrees C) and oxygen partial pressures (from 1 atm to values below 10(-20) atm) is considered. New aspects are brought to evidence after proper handling of published data on undoped zirconia and MgO-doped materials. The close temperature dependencies of the lower limits of the ionic domains of all these materials suggest the relevance of acceptor-type contaminations on the performance of nominally pure materials. High ionic mobility in the tetragonal phase with respect to the cubic phase is also likely, based on published data. Dopants like Y2O3 originate wider ionic domains but are not equally effective with respect to thermal shock resistance. The unique characteristics of MgO-doped zirconia are due to the coexistence of distinct phases, including large populations of finely dispersed monoclinic and/or tetragonal phases within cubic matrix grains. An overview of key features (materials and design) involved in the performance of oxygen sensors for molten steel is also provided.
publisher SPRINGER
issn 0021-891X
isbn 1572-8838
year published 2017
volume 47
issue 10
beginning page 1091
ending page 1113
digital object identifier (doi) 10.1007/s10800-017-1112-z
web of science category Electrochemistry
subject category Electrochemistry
unique article identifier WOS:000410472800001
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journal analysis (jcr 2017):
journal impact factor 2.262
5 year journal impact factor 2.363
category normalized journal impact factor percentile 41.071
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