Highly controlled thermal behavior of a conjugated gadolinia-doped ceria nanoparticles synthesized by particle-dispersed glycine-nitrate process

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• 作者：Seunghwan Lee^a ; ^b ; Dongwook Shin^b ; Mansoo Park^a ; Jongsup Hong^a ; Hyoungchul Kim^a ; Ji-Won Son^a ; Jong-Ho Lee^a ; Byung-Kook Kim^a ; Hae-Weon Lee^a ; Kyung Joong Yoon^a ; ^{kjyoon@kist.re.kr}
• 关键词：Gadolinia-doped ceria ; Glycine-nitrate process ; Sintering ; Nanoparticle ; Solid oxide fuel cell
• 刊名：Journal of the European Ceramic Society
• 出版年：2017
• 出版时间：May 2017
• 年：2017
• 卷：37
• 期：5
• 页码：2159-2168
• 全文大小：4302 K
• 卷排序：37

文摘

Gadolinia-doped ceria (GDC) has emerged as one of the most essential component materials for next-generation solid oxide fuel cells (SOFCs). The refractory nature of GDC has been a major hurdle for its successful implementation, and precise control of the thermal behavior is crucial. Here, we report a particle-dispersed glycine-nitrate process (PD-GNP) that leads to the formation of fast-sintering nanoparticles uniformly conjugated to the surface of slow-sintering inclusion particles. The independent regulation of nanoparticles and sintering aids based on in situ co-assembly process enables precise control over the individual stages of the sintering process and grain growth, resulting in complete densification at desired temperatures. This work highlights a simple and cost-effective way to produce exquisitely tailored GDC nanopowder for specific purposes in the manufacturing of SOFCs; furthermore, it expands opportunities to effectively exploit nanotechnology in the fabrication of a wide range of multilayer ceramic devices.