Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 35, Issue 10, Pages 2815-2821Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2015.03.045
Keywords
Densification activation energy; Grain growth exponent; Grain boundary migration; Solute drag
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Funding
- Fundamental Research Funds for the Central Universities [HIT. NSRIF 2013.059]
- National Natural Science Foundation of China [21006016, 21246011]
- Postdoctoral Science-Research Developmental Foundation of Heilongjiang province [LBH-Q11112]
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Densification and microstructure for Ce0.9Gd0.1O1.95-delta and trivalent co-doped CeO2 (Ce0.9Gd0.06Bi0.04O1.95-delta) 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 419 kJ mol(-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. (C) 2015 Elsevier Ltd. All rights reserved.
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