阴极材料LaFe_(0.8-x)Cu_xNi_(0.2)O_3的合成和烧结性能  

Synthesis and Sintering of Cathode Materials LaFe_(0.8-x)Cu_xNi_(0.2)O_3

作　　者：李嵩[1] 文钟晟[1] 季世军[1] 孙俊才[1] 程成[1] 

机构地区：[1]大连海事大学材料工艺研究所,大连116026

出　　处：《无机化学学报》2006年第1期149-152,共4页Chinese Journal of Inorganic Chemistry

基　　金：瑞典-亚洲国际合作计划项目(No.DNR6964)。

摘　　要：LaFe0.8-xCuxNi0.2O3 (x=0.0￣0.2) (LFCN), a new cathode material of solid oxide fuel cell (SOFC), was synthesized by Co-precipitation method using sodium bicarbonate. The lattice structures of samples with different x contents were characterized by XRD. Porosity and density of the porous LaFe0.8-xCuxNi0.2O3 (x=0.0￣0.1) as a function of sintering temperature were investigated. It was found that the orthorhombic structure could be formed after calcination at 900 ℃ for 4 h. The particle size of LFCN was about 350 nm. The density of the porous LFCN increased with sintering temperature, but the opposite was true for the porosity. On the other hand, at the same sintering temperature, the porosity of LaFe0.8-xCuxNi0.2O3 (x=0.0￣0.1) decreased with increasing x contents. It is in- dicated that the dopant of Cu on LaFe0.8Ni0.2O3 can facilitate the sintering of the materials. After sintering at 1100 ℃ for 4 h, the porous LaFe0.7Cu0.1Ni0.2O3 was still with appropriate structure, and its porosity was 29%.LaFe0.8-xCuxNi0.2O3 （x=0.0-0.2） （LFCN）, a new cathode material of solid oxide fuel cell （SOFC）, was synthesized by Co-precipitation method using sodium bicarbonate. The lattice structures of samples with different x contents were characterized by XRD. Porosity and density of the porous LaFe0.8-xCuxNi0.2O3 （x=0.0-0.1） as a function of sintering temperature were investigated. It was found that the orthorhombic structure could be formed after calcination at 900 ℃ for 4 h. The particle size of LFCN was about 350 nm. The density of the porous LFCN increased with sintering temperature, but the opposite was true for the porosity. On the other hand, at the same sintering temperature, the porosity of LaFe0.8-xCuxNi0.2O3 （x=0.0-0.1） decreased with increasing x contents. It is in- dicated that the dopant of Cu on LaFe0.8-xCuxNi0.2O3 can facilitate the sintering of the materials. After sintering at 1 100 for 4 h, the porous LaFe0.8-xCuxNi0.2O3 was still with appropriate structure, and its porosity was 29%.

关 键 词：阴极材料 LaFe0.8-xCuxNi0.2O3 共沉淀法 烧结性能 

分 类 号：O614.81[理学—无机化学] O614.33[理学—化学]