Synthesis of Nanocrystalline Ceria Powders for SOFC Electrolyte

SOFC 전해질 제조를 위한 나노결정 세리아 분말의 합성

Nanocrystalline ceria powders were prepared by hydrothermal treatment of cerium(IV) ammonium nitrate solution without a precipitating agent. A systematic investigation of the effect of hydrothermal temperature and react ion time on the physical properties of the product powders was carried out. When the hydrothermal temperature was increased, the product ceria powders exhibited larger crystallite size with higher yield. Increasing reaction time produced more crystalline ceria powders attributed to further hydrothermal reactions and structural rearrangement. The physical properties of ceria powders can be control led by adjusting the hydrothermal conditions.