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Oxygen ion conductivity of platinum‐impregnated stabilized zirconia in bulk and microporous materials
Author(s) -
Ziehfreund Andreas,
Simon Ulrich,
Maier Wilhelm F.
Publication year - 1996
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.19960080512
Subject(s) - materials science , yttria stabilized zirconia , platinum , cubic zirconia , microporous material , crystallite , conductivity , ionic conductivity , intergranular corrosion , oxygen , porosity , grain boundary , atmospheric temperature range , oxygen sensor , inorganic chemistry , chemical engineering , analytical chemistry (journal) , ceramic , composite material , metallurgy , microstructure , chemistry , electrode , catalysis , organic chemistry , physics , meteorology , electrolyte , engineering
The effect of platinum impregnation on the ionic conductivity of yttria stabilized zirconia (YSZ) has been determined using complex impedance measurements in the frequency range 10 1 –10 7 Hz. Ionic conductivities and the corresponding activation enthalpies are reported for the temperature range 200–600°C. Platinum agglomerated at the grain boundaries of polycrystalline samples reduces ion transport across the intergranular zone. The evaporation and recondensation of YSZ and the addition of Pt results in porous materials with improved oxygen ion conductivity.