Hydrothermal Synthesis, Characterization, and Sintering Behavior of Core-Shell Particles: A Principle Study on Lanthanum Strontium Cobaltite Coated with Nanosized Gadolinium Doped Ceria

Yu Xu, Philipp Zielke, Ngo Van Nong, Stéven Pirou, Raquel Reolon, Xiaoqing Si, Søren Bredmose Simonsen, Poul Norby, Henning Lühmann, Wolfgang Bensch, Ragnar Kiebach*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

In this work, nanostructured (La0.6Sr0.4)0.99CoO3 (LSC)-Ce0.8Gd0.2O1.9 (CGO) core-shell particles were prepared by precipitating CGO nanoparticles on the surface of LSC particles under hydrothermal conditions. The as-prepared core-shell particles were sintered by spark plasma sintering (SPS) and conventional sintering, and the microstructure evolution and densification behavior were studied. Dense microstructures were reached using both sintering methods at relatively low temperatures. In the case of SPS, the core-shell architecture was partially maintained and nano-structured CGO grains were formed, while conventional sintering led to the formation of larger CGO grains. This work covers a detailed characterization of (a) the individual LSC-CGO core-shell particles and (b) the composites after densification.
Original languageEnglish
JournalCeramics
Volume1
Issue number2
Pages (from-to)246-260
ISSN2571-6131
DOIs
Publication statusPublished - 2019

Keywords

  • Hydrothermal
  • Core-shell
  • Lanthanum strontium cobaltite
  • Gadolinium-doped ceria
  • Spark plasma sintering

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