Enhanced mass diffusion phenomena in highly defective doped ceria

Vincenzo Esposito, De Wei Ni, Zeming He, Wei Zhang, Aditya Shanker Prasad, Julie Glasscock, Christodoulos Chatzichristodoulou, Severine Ramousse, Andreas Kaiser

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The densification and grain growth of the solid state ionic conductor material Ce0.9Gd0.1O1.95−δ (i.e. GDC10, gadolinium-doped ceria, with Gd 10mol.%) are analysed for nanometric and fine powders of various particle sizes, both in air and in a 9vol.% H2–N2 mixture. Due to a dominant solute drag effect in aliovalent highly doped ceria, the starting morphology of the powders controls the diffusion mechanisms of the material in air. Conversely, highly enhanced densification and grain growth are achieved by firing the materials at reduced temperatures (800
Original languageEnglish
JournalActa Materialia
Volume61
Issue number16
Pages (from-to)6290-6300
ISSN1359-6454
DOIs
Publication statusPublished - 2013

Keywords

  • Gadolinium-doped ceria
  • Solute drag
  • Defects
  • Sintering
  • Grain growth

Cite this

Esposito, Vincenzo ; Ni, De Wei ; He, Zeming ; Zhang, Wei ; Prasad, Aditya Shanker ; Glasscock, Julie ; Chatzichristodoulou, Christodoulos ; Ramousse, Severine ; Kaiser, Andreas. / Enhanced mass diffusion phenomena in highly defective doped ceria. In: Acta Materialia. 2013 ; Vol. 61, No. 16. pp. 6290-6300.
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abstract = "The densification and grain growth of the solid state ionic conductor material Ce0.9Gd0.1O1.95−δ (i.e. GDC10, gadolinium-doped ceria, with Gd 10mol.{\%}) are analysed for nanometric and fine powders of various particle sizes, both in air and in a 9vol.{\%} H2–N2 mixture. Due to a dominant solute drag effect in aliovalent highly doped ceria, the starting morphology of the powders controls the diffusion mechanisms of the material in air. Conversely, highly enhanced densification and grain growth are achieved by firing the materials at reduced temperatures (800",
keywords = "Gadolinium-doped ceria, Solute drag, Defects, Sintering, Grain growth",
author = "Vincenzo Esposito and Ni, {De Wei} and Zeming He and Wei Zhang and Prasad, {Aditya Shanker} and Julie Glasscock and Christodoulos Chatzichristodoulou and Severine Ramousse and Andreas Kaiser",
year = "2013",
doi = "10.1016/j.actamat.2013.07.012",
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Enhanced mass diffusion phenomena in highly defective doped ceria. / Esposito, Vincenzo; Ni, De Wei; He, Zeming; Zhang, Wei; Prasad, Aditya Shanker; Glasscock, Julie; Chatzichristodoulou, Christodoulos; Ramousse, Severine; Kaiser, Andreas.

In: Acta Materialia, Vol. 61, No. 16, 2013, p. 6290-6300.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Enhanced mass diffusion phenomena in highly defective doped ceria

AU - Esposito, Vincenzo

AU - Ni, De Wei

AU - He, Zeming

AU - Zhang, Wei

AU - Prasad, Aditya Shanker

AU - Glasscock, Julie

AU - Chatzichristodoulou, Christodoulos

AU - Ramousse, Severine

AU - Kaiser, Andreas

PY - 2013

Y1 - 2013

N2 - The densification and grain growth of the solid state ionic conductor material Ce0.9Gd0.1O1.95−δ (i.e. GDC10, gadolinium-doped ceria, with Gd 10mol.%) are analysed for nanometric and fine powders of various particle sizes, both in air and in a 9vol.% H2–N2 mixture. Due to a dominant solute drag effect in aliovalent highly doped ceria, the starting morphology of the powders controls the diffusion mechanisms of the material in air. Conversely, highly enhanced densification and grain growth are achieved by firing the materials at reduced temperatures (800

AB - The densification and grain growth of the solid state ionic conductor material Ce0.9Gd0.1O1.95−δ (i.e. GDC10, gadolinium-doped ceria, with Gd 10mol.%) are analysed for nanometric and fine powders of various particle sizes, both in air and in a 9vol.% H2–N2 mixture. Due to a dominant solute drag effect in aliovalent highly doped ceria, the starting morphology of the powders controls the diffusion mechanisms of the material in air. Conversely, highly enhanced densification and grain growth are achieved by firing the materials at reduced temperatures (800

KW - Gadolinium-doped ceria

KW - Solute drag

KW - Defects

KW - Sintering

KW - Grain growth

U2 - 10.1016/j.actamat.2013.07.012

DO - 10.1016/j.actamat.2013.07.012

M3 - Journal article

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SP - 6290

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JO - Acta Materialia

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