RT Journal Article
T1 Microstructure-property relationships in composites of 8YSZ ceramics and in situ graphitized nanocellulose
A1 Hudelja, Polona
A1 Schmidt, Rainer
A1 Amorín, Harvey
A1 Drev, Sandra
A1 Ivekovic, Aljaz
A1 Abram, Anze
A1 Kocjan, Andraz
A1 Wicklein, Bernd
AB Ceramic matrix composites (CMC) of 8 mol.% yttria-stabilized zirconia (8YSZ) mixed with natural fiber nano cellulose (0.75, 1, 2 wt%) were prepared by spark plasma sintering (SPS). Nanocellulose markedly improved the densification of the 8YSZ ceramic matrix and induced significant grain size refinement. It was demonstrated that in situ graphitization of nanocellulose during the SPS processing resulted in 6 nm thin turbostratic graphite layers homogeneously covering the 8YSZ ceramic grains. The dielectric properties were analyzed by electrical impedance spectroscopy suggesting a low percolation threshold near or below asymptotic to 1.6 vol% graphite, above which mixed ionic-electronic conduction dominates. The CMCs are stable under reducing conditions (5%H-2/Ar atmosphere) at least until 800 ? with a high conductivity of sigma(dc) = 0.17 S center dot cm(-1) even at 900 ? (8YSZ-2%CNF). These features make the 8YSZ-nanocellulose CMCs promising candidates for application in medium-to high temperature electrochemical devices.
PB Elsevier
SN 0955-2219
YR 2022
FD 2022-04-25
LK https://hdl.handle.net/20.500.14352/93767
UL https://hdl.handle.net/20.500.14352/93767
LA eng
NO Polona Hudelja, Rainer Schmidt, Harvey Amorín, Sandra Drev, Aljaž Iveković, Anže Abram, Andraž Kocjan, Bernd Wicklein, Microstructure-property relationships in composites of 8YSZ ceramics and in situ graphitized nanocellulose, Journal of the European Ceramic Society, Volume 42, Issue 11, 2022, Pages 4594-4606, ISSN 0955-2219, https://doi.org/10.1016/j.jeurceramsoc.2022.04.041.
NO Se deposita la versión preprint del artículo
NO JECS Trust
NO Slovenian Research Agency
NO EU FLAG-ERA project To2Dox
NO Gobierno de España
NO Unión Europea
DS Docta Complutense
RD 11 abr 2025