Publisher : The Korean Institute of Electrical and Electronic Material Engineers
DOI : 10.4313/TEEM.2015.16.4.194
Title & Authors
Characteristics of Lanthanum Silicates Electrolyte for Solid Oxide Fuel Cells Lee, Dong-Jin; Lee, Sung-Gap; Noh, Hyun-Ji; Jo, Ye-Won;
La9.33(Si5V1)O26 ceramics were fabricated by the mixed oxide method for solid oxide electrolytes. La9.33(Si5V1)O26 specimens showed the hexagonal, space group P63 or P63/m, and the unit cell volume increased when the sintering temperature increased. The specimen sintered at 1,400℃ showed the X-ray patterns of the homogeneous apatite single phase without the second phase, such as La2SiO5 and SiO2. The specimen sintered at 1,400℃ showed the maximum sintered density of 4.93 g/cm3. When the sintering temperature increased, the electrical conductivities increased, the activation energy decreased and the values were 7.83×10−4 S/cm, 1.61 eV at 600℃, respectively.