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@ARTICLE{Meuffels:56545,
author = {Meuffels, P.},
title = {{P}ropane gas sensing with high-density
{S}r{T}i0.6{F}e0.4{O}(3-gamma) ceramics evaluated by
thermogravimetric analysis},
journal = {Journal of the European Ceramic Society},
volume = {27},
issn = {0955-2219},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {PreJuSER-56545},
pages = {285},
year = {2007},
note = {Record converted from VDB: 12.11.2012},
abstract = {Semi-conducting SrTi0.6Fe0.4O(3-delta) in the form of
porous thick films might be of interest as a novel material
for resistive hydrocarbon sensor applications. As the
underlying gas-sensing mechanism is still a matter of
question, thermogravimetric analysis was performed on
high-density (>= $99\%)$ SrTi0.6Fe0.4O(3-delta) ceramic
specimens in order to investigate whether bulk properties
are affected by the catalytic oxidation of propane at the
material surface. At temperatures 250-400 degrees C, bulk
oxygen content was found to significantly decrease upon
exposure to traces of propane (0-3000 ppm) in a background
of $20\%$ $O-2/80\%$ Ar. Lattice oxygen is sufficiently
mobile in this compound so that reducing surface reactions
are followed by a bulk redox reaction even at low or
moderate temperatures. Concomitant changes in the electrical
resistance of dense ceramics are consistent with this
picture. The hydrocarbon sensitivity of
SrTi0.6Fe0.40O(3-delta) artifacts seems thus to a large
extent to be correlated to modifications in the bulk defect
chemistry of the material. (c) 2006 Elsevier Ltd. All rights
reserved.},
keywords = {J (WoSType)},
cin = {IFF-6},
ddc = {660},
cid = {I:(DE-Juel1)VDB786},
pnm = {Kondensierte Materie},
pid = {G:(DE-Juel1)FUEK414},
shelfmark = {Materials Science, Ceramics},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000242565400039},
doi = {10.1016/j.jeurceramsoc.2006.05.078},
url = {https://juser.fz-juelich.de/record/56545},
}