【作者】 程继贵； 刘亚飞； 刘杏芹； 彭定坤； 孟广耀；

【Author】 CHENG Ji-gui;LIU Ya-fei;LIU Xin-qin;PENG Ding-kun;MENG Guang-yao Department of Material Science and Engineering, University of Science and Technology of China, Hefei, 290026, China

【机构】 中国科技大学材料科学与工程系；

【摘要】 以硝酸盐为原料,采用有机物辅助的水基凝胶浇注（Gel-casting）工艺合成出了Gd_0.1Ce_0.9O_1.95（DCO）粉体,研究了其相组成、结构及性能和合成工艺的关系,并测定了粉体的烧结行为及DCO烧结体的电化学特性。试验结果表明,采用本实验的Gel casting方法,在较低的温度下燃烧干凝胶,即可制备出纯度高、组成均匀、相结构完整、粒度细小的DCO粉体。以该粉体为原料,经压制成型所得生坯在1450℃温度下烧结,所得烧结体组织致密,相对密度可达95%以上。所制备的DCO电解质材料在空气中、700℃温度下的电导率可达0.05S/cm。更多还原

【Abstract】 In this paper, Gd_0.1Ce_0.9（DCO） powders were prepared by a modified gel-casting process withorganism aided. The properties of the powders, including their phase composition, morphology, partic1e size, as well astheir sinterability electrical behaviors were all characterized. The test results have shown that the DCO powdersobtained in this work is pure single phase with a particle size from 10 to 50 nm after calcining the dry gel at a lowertemperature. A more than 95% densification has been achieved by sintering the green powder compacts at atemperature above 1450℃ for 5 hours, and the DCO electrolyte obtained has an ionic conductivity of 0.05S·cm^-1at700℃ in air.更多还原