Densification and grain growth behavior study of trivalent MO1.5 (M=Gd, Bi) doped ceria systems

Lili Guan; Shiru Le; Xiaodong Zhu; Shaofei He; Kening Sun

doi:10.1016/j.jeurceramsoc.2015.03.045

Densification and grain growth behavior study of trivalent MO_1.5 (M=Gd, Bi) doped ceria systems

Lili Guan
, Shiru Le^*
, Xiaodong Zhu
, Shaofei He
, Kening Sun

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

Densification and microstructure for Ce_0.9Gd_0.1O_1.95-δ and trivalent co-doped CeO₂ (Ce_0.9Gd_0.06Bi_0.04O_1.95-δ) were investigated. The sinterability of co-doped nano-crystalline CeO₂ was heightened compared to Gd-doped CeO₂ according to the dilatometer measurements. The activation energy for densification was 745 and 419kJmol^-1 for Gd-doped CeO₂ and co-doped CeO₂, respectively. The improved sintering behavior was attributed to the lower activation energy of co-doped CeO₂. Investigations on the grain growth in the ceramics showed the suppressing effects of co-doped CeO₂. The grain growth kinetics study indicated that the grain growth exponent, m, was 3 for Gd-doped CeO₂, and 4 for co-doped CeO₂, respectively.

Original language	English
Pages (from-to)	2815-2821
Number of pages	7
Journal	Journal of the European Ceramic Society
Volume	35
Issue number	10
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2015.03.045
State	Published - 1 Sep 2015

Keywords

Densification activation energy
Grain boundary migration
Grain growth exponent
Solute drag

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10.1016/j.jeurceramsoc.2015.03.045

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@article{10cae06231f24d59a89ab1af1a4cedbb,

title = "Densification and grain growth behavior study of trivalent MO1.5 (M=Gd, Bi) doped ceria systems",

abstract = "Densification and microstructure for Ce0.9Gd0.1O1.95-δ and trivalent co-doped CeO2 (Ce0.9Gd0.06Bi0.04O1.95-δ) were investigated. The sinterability of co-doped nano-crystalline CeO2 was heightened compared to Gd-doped CeO2 according to the dilatometer measurements. The activation energy for densification was 745 and 419kJmol-1 for Gd-doped CeO2 and co-doped CeO2, respectively. The improved sintering behavior was attributed to the lower activation energy of co-doped CeO2. Investigations on the grain growth in the ceramics showed the suppressing effects of co-doped CeO2. The grain growth kinetics study indicated that the grain growth exponent, m, was 3 for Gd-doped CeO2, and 4 for co-doped CeO2, respectively.",

keywords = "Densification activation energy, Grain boundary migration, Grain growth exponent, Solute drag",

author = "Lili Guan and Shiru Le and Xiaodong Zhu and Shaofei He and Kening Sun",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

year = "2015",

month = sep,

day = "1",

doi = "10.1016/j.jeurceramsoc.2015.03.045",

language = "英语",

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TY - JOUR

T1 - Densification and grain growth behavior study of trivalent MO1.5 (M=Gd, Bi) doped ceria systems

AU - Guan, Lili

AU - Le, Shiru

AU - Zhu, Xiaodong

AU - He, Shaofei

AU - Sun, Kening

PY - 2015/9/1

Y1 - 2015/9/1

N2 - Densification and microstructure for Ce0.9Gd0.1O1.95-δ and trivalent co-doped CeO2 (Ce0.9Gd0.06Bi0.04O1.95-δ) were investigated. The sinterability of co-doped nano-crystalline CeO2 was heightened compared to Gd-doped CeO2 according to the dilatometer measurements. The activation energy for densification was 745 and 419kJmol-1 for Gd-doped CeO2 and co-doped CeO2, respectively. The improved sintering behavior was attributed to the lower activation energy of co-doped CeO2. Investigations on the grain growth in the ceramics showed the suppressing effects of co-doped CeO2. The grain growth kinetics study indicated that the grain growth exponent, m, was 3 for Gd-doped CeO2, and 4 for co-doped CeO2, respectively.

AB - Densification and microstructure for Ce0.9Gd0.1O1.95-δ and trivalent co-doped CeO2 (Ce0.9Gd0.06Bi0.04O1.95-δ) were investigated. The sinterability of co-doped nano-crystalline CeO2 was heightened compared to Gd-doped CeO2 according to the dilatometer measurements. The activation energy for densification was 745 and 419kJmol-1 for Gd-doped CeO2 and co-doped CeO2, respectively. The improved sintering behavior was attributed to the lower activation energy of co-doped CeO2. Investigations on the grain growth in the ceramics showed the suppressing effects of co-doped CeO2. The grain growth kinetics study indicated that the grain growth exponent, m, was 3 for Gd-doped CeO2, and 4 for co-doped CeO2, respectively.

KW - Densification activation energy

KW - Grain boundary migration

KW - Grain growth exponent

KW - Solute drag

UR - https://www.scopus.com/pages/publications/84928829304

U2 - 10.1016/j.jeurceramsoc.2015.03.045

DO - 10.1016/j.jeurceramsoc.2015.03.045

M3 - 文章

AN - SCOPUS:84928829304

SN - 0955-2219

VL - 35

SP - 2815

EP - 2821

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 10

ER -

Densification and grain growth behavior study of trivalent MO_1.5 (M=Gd, Bi) doped ceria systems

Abstract

Keywords

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