摘要
以柠檬酸-硝酸盐溶液为前驱体,采用低温自燃烧法合成了具有K2NiF4结构的中温固体氧化物燃料电池La2NiO4阴极材料。研究了影响溶胶和凝胶的形成以及La2NiO4粉体晶相结构的影响因素,确定了最佳的合成条件。研究结果表明:自燃烧产物经1000℃煅烧2h后,形成了平均粒径约为90nm的单一La2NiO4相。经1300℃烧结的La2NiO4在100～800℃范围内平均热膨胀系数为13.9×10-6K-1,在600～800℃范围内测得的总电导率为84.5～96.3S·cm-1。
Using citric acid-nitrate solution as precursors, superfine powers of La2NiO4 with K2NiF4 structure for intermediate temperature solid oxide fuel cell were synthesized by low-temperature selfcombustion method in this paper. Some factors influencing on the formation of sol and gel as well as the crystal structure of synthesized powders were discussed, and the optimum synthesis condition was determined. The results show that the products calcined at 1000 ℃ for 2 hours form La2NiO4 single-phase with the average particles size of 90 nm. The average thermal expansion coefficient of La2 NiO4 ceramic sintered at 1300 ℃ is 13.9 × 10^-6 K^-1 from 100 to 800 ℃, the total conductivities are 84.5 - 96.3 S · cm^-1 from 600 to 800 ℃.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2009年第1期38-43,共6页
Bulletin of the Chinese Ceramic Society
