TY  - JOUR
AU  - Mishra, Tarini Prasad
AU  - Neto, Rubens Roberto Ingraci
AU  - Speranza, Giorgio
AU  - Quaranta, Alberto
AU  - Sglavo, Vincenzo M.
AU  - Raj, Rishi
AU  - Guillon, Olivier
AU  - Bram, Martin
AU  - Biesuz, Mattia
TI  - Electronic conductivity in gadolinium doped ceria under direct current as a trigger for flash sintering
JO  - Scripta materialia
VL  - 179
SN  - 1359-6462
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2020-00908
SP  - 55 - 60
PY  - 2020
AB  - In this paper, we discuss the progression of flash sintering in 10mol% gadolinium-doped ceria specimens. Flash transition is correlated with the generation of n-type electronic conductivity in air under direct-current bias. Its origin is attributed to partial reduction of the material which propagates from the cathodic-to-anodic region. The phenomenon was observed, in-situ, by monitoring the development of electrochemical blackening during the incubation period of the flash-experiment. Anomalous features, including shift in the valence band edge, shrinkage of the band-gap and change in the oxidation state of Ce in flashed samples was confirmed by X-ray photoelectron spectroscopy and diffuse reflectance measurements.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000514758200012
DO  - DOI:10.1016/j.scriptamat.2020.01.007
UR  - https://juser.fz-juelich.de/record/873679
ER  -