Next Article in Journal
PVB/PEG-Based Feedstocks for Injection Molding of Alumina Microreactor Components
Previous Article in Journal
Polymer Processing: Modeling and Correlations Finalized to Tailoring Plastic Part Morphology and Properties
Previous Article in Special Issue
Tribological Characterization of Micron-/Nano-Sized WC-9%Co Cemented Carbides Prepared by Spark Plasma Sintering at Elevated Temperatures
Article Menu
Issue 8 (April-2) cover image

Export Article

Open AccessArticle

Gd/Sm-Pr Co-Doped Ceria: A First Report of the Precipitation Method Effect on Flash Sintering

Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Via G. Di Biasio 43, 03043 Cassino (FR), Italy
Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123 Trento, Italy
Center of Hydrogen-Fuel Cell Research, Korea Institute of Science and Technology, Hwarangno 14-gil, Seongbuk-gu, Seoul 136-791, Korea
Author to whom correspondence should be addressed.
Materials 2019, 12(8), 1218;
Received: 26 March 2019 / Revised: 9 April 2019 / Accepted: 11 April 2019 / Published: 14 April 2019
PDF [8614 KB, uploaded 14 April 2019]


In this work, ceria-based ceramics with the composition Gd0.14Pr0.06Ce0.8O2-δ and Sm0.14Pr0.06Ce0.8O2-δ, were synthesized by a simple co-precipitation process using either ammonium carbonate or ammonia solution as a precipitating agent. After the calcination, all of the produced samples were constituted by fluorite-structured ceria only, thus showing that both dopant and co-dopant cations were dissolved in the fluorite lattice. The ceria-based nanopowders were uniaxially compacted and consequently flash-sintered using different electrical cycles (including current-ramps). Different results were obtained as a function of both the adopted precipitating agent and the applied electrical cycle. In particular, highly densified products were obtained using current-ramps instead of “traditional” flash treatments (with the power source switching from voltage to current control at the flash event). Moreover, the powders that were synthesized using ammonia solution exhibited a low tendency to hotspot formation, whereas the materials obtained using carbonates as the precipitating agent were highly inhomogeneous. This points out for the first time the unexpected relevance of the precipitating agent (and of the powder shape/degree of agglomeration) for the flash sintering behavior. View Full-Text
Keywords: co-doped ceria; flash sintering; precipitation co-doped ceria; flash sintering; precipitation

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Spiridigliozzi, L.; Pinter, L.; Biesuz, M.; Dell’Agli, G.; Accardo, G.; Sglavo, V.M. Gd/Sm-Pr Co-Doped Ceria: A First Report of the Precipitation Method Effect on Flash Sintering. Materials 2019, 12, 1218.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top