고에너지 볼밀링에 의해 제조된 Gd₂O₃-doped CeO₂ 나노분말의 소결 거동에 관한 연구
Sintering Behavior of Nano-sized GGd₂O₃-doped CeO₂ Powder Prepared by A High Energy Ball Milling
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Gd₂O₃-doped CeO₂(GDC) solid solutions have been considered as a promising materials for electrolytes in intermediate-temperature solid oxide fuel cells. In this study, the nano-sized GDC powder with average particle size of 69nm was prepared by a high energy ball milling process and its sintering behavior was investigated. Heat-treatment at 1200oC of nano-sized GDC powder mixture led to GDC solid-solution. The enhanced densification over 96% of relative density was obtained after sintering at 1300℃ for 2h. It was found that the sinterability of GDC powder could be significantly improved by the introduction of a high energy ball milling process.
Abstract
Gd₂O₃-doped CeO₂(GDC) solid solutions have been considered as a promising materials for electrolytes in intermediate-temperature solid oxide fuel cells. In this study, the nano-sized GDC powder with average particle size of 69nm was prepared by a high energy ball milling process and its sintering behavior was investigated. Heat-treatment at 1200oC of nano-sized GDC powder mixture led to GDC solid-solution. The enhanced densification over 96% of relative density was obtained after sintering at 1300℃ for 2h. It was found that the sinterability of GDC powder could be significantly improved by the introduction of a high energy ball milling process.
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