Synthesis of Gd-doped CeO2 by ultrasonic spray pyrolysis with salt-assisted decomposition and its electrical and mechanical properties
- Authors
- Park, Hee Jung; Kim, Gyung Bok; Jung, Seng Jae; Lee, Young-In; Yang, Jae-Kyo; Jin, Yun Ho; Choa, Yong Ho
- Issue Date
- Aug-2016
- Publisher
- 세라믹공정연구센터
- Keywords
- USP; GDC; Density; Electrical property; Mechanical property
- Citation
- Journal of Ceramic Processing Research, v.17, no.8, pp.818 - 824
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- Journal of Ceramic Processing Research
- Volume
- 17
- Number
- 8
- Start Page
- 818
- End Page
- 824
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/13139
- DOI
- 10.36410/jcpr.2016.17.8.818
- ISSN
- 1229-9162
- Abstract
- Much attention has been paid to acceptor doped-ceria as a promising solid electrolyte for intermediate temperature solid oxide fuel cells (IT-SOFCs) due to its high oxygen-ion conductivity. However, poor sinterability leading to high grain boundary resistance and weak mechanical properties have limited its commercialization. In this work, ceria nanoparticles were synthesized via ultrasonic spray pyrolysis using salt-assisted decomposition (SA-USP) to enhance the sinterabililty of the ceria. The effects of the quantity of added salt on the nanoparticle-characteristics were examined. Highly dense ceria (relative density similar to 97.5%) was obtained by sintering the nanoparticles at a temperature as low as 1300 degrees C and its mechanical and electrical properties were investigated. The hardness and the oxygen-ion conductivity of the ceria with high density were reasonably good, similar to 14 GPa and above 10(-3) S/cm at the IT-SOFC operating temperatures.
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