纳米粉体(CeO_2)_(0.9-x)(GdO_(1.5))_x(Sm_2O_3)_(0.1)的溶胶-凝胶低温燃烧合成  

SYNTHESIS OF NANOMETER (CeO_2)_(0.9-x) (GdO_(1.5) )_x(Sm_2O_3)_(0.1) POWDERS BY SOL-GEL LOW TEMPERATURE COMBUSTION

作　　者：黎大兵[1] 胡建东[1] 连建设[1] 张秀燕[1] 陈积伟[1] 郭作兴[1] 王红颖[1] 

机构地区：[1]吉林大学南岭校区材料科学与工程学院微观分析中心,长春130025

出　　处：《硅酸盐学报》2001年第4期340-343,共4页Journal of The Chinese Ceramic Society

基　　金：吉林省科技发展基金资助项目 (2 0 0 0 0 3 2 2 );国家杰出青年基金部分资助项目 (5 962 5 10 2 )

摘　　要：采用溶胶 -凝胶法与低温燃烧法相结合 ,合成了 (CeO2 ) 0 .9-x(GdO1 .5 ) x(Sm2 O3) 0 .1 系列粉体 .结果表明 :由硝酸盐与柠檬酸混合形成的凝胶 ,可在较低温度 (2 0 0～ 3 0 0℃ )点火并燃烧 ,其火焰温度达 90 0℃以上 .经TEM ,XRD测试 ,燃烧后即直接形成了粒径为 2 0～ 3 0nm ,具有萤石结构的单相粉体 ,由该粉体制备的固体电解质在中温下电导率为 5 .8× 10 - 2 S/cm ,组装的单个H2 -O2 燃料电池最大功率密度达 70mWCeO 2) 0.9- x (GdO 1.5 ) x (Sm 2O 3) 0.1 powders were synthesized by employing both sol-gel and low temperature combustion methods. The results showed that the gels, formed from the aqueous solution of metal and citric, had self_propagation combustion characteristics after being ignited at the temperature as low as 200-300 ℃, the highest flame temperature reached more than 900 ℃. The formed (CeO 2) 0.9- x (GdO 1.5 ) x (Sm 2O 3) 0.1 powders, characterized by TEM and XRD, are single phase solid solutions with fluorite structure and particle size of 20-30 nm. The conductivity of electrolyte, fabricated by using this powders, is 5.8×10 -2 S/cm at 600 ℃ and the maximum power density of single oxygen-hydrogen fuel cell is up to 70 mW·cm -2 .

关 键 词：溶胶-凝胶法 低温燃烧 氧化铈 固体电解质 纳米粉体 合成 (CeO2)0.9-x(GdO1.5)x(Sm2O3)0.1 

分 类 号：TF123.72[冶金工程—粉末冶金]