无机材料学报2011，Vol.26Issue(11)：1147-1151,5.DOI:10.3724/SP.J.1077.2011.01147
La0.8Sr0.2CoxFe1-xO3型氧扩散障层材料的制备及结构性能研究
Synthesis and Properties of La0.8Sr0.2CoxFe1-xO3 Mixed Ionic and Electronic Conducting Ceramics for Dense Diffusion Barriers
摘要
Abstract
The precursor of La0.8Sr0.2CoχFe1-Χo3 (χ=1.0, 0, 0.3) oxygen diffusion barriers were prepared by a combined co-precipitation-gel method. The structure and properties of three different powders and ceramics were analyzed by X-ray diffraction, transmission electron microscope, scanning electron microscope and impedance spectroscope. The results show that La0.8Sr0.2CoχFe1-Χo3 (χ=1.0, 0, 0.3) powders calcined at 870°C have perovskite-type structure with no hard agglomerates, and their particle sizes are in the range of 20-60 nm. After are La0.8Sr0.2CoO3 and the La0.8Sr0.2FeO3 mix conductor pressed isostatically at 250MPa and then sintered at 1120°C for 6h, their conductivities are in the order of 10-1S/cm in air. While the sintered La0.8Sr0.2CO0.3Fe0.7O3 conductivity is up to 10°S/cm magnitude. The electronic conductivity of La0.8Sr0.2CoχFe1-Χo3 (χ=1.0, 0, 0.3) ceramic is much bigger than ionic conductivity. The conductivities of the ceramics reach the maximum in the temperature range of 200-300°C, which tend to the lower temperature than those reported in the literature.关键词
La0.8Sr0.2CoxFe1-xO3(x=-1.0、0、0.3)/氧扩散障碍层/混合导体/钙钛矿相Key words
La0.8Sr0.2CoχFe1-χO3 (χ=1.0、0、0.3)/ oxygen diffusion barrier/ mixed conductor/ perovskite-type分类
化学化工引用本文复制引用
赵光,纪箴,田文怀,黄敏,葛泳..La0.8Sr0.2CoxFe1-xO3型氧扩散障层材料的制备及结构性能研究[J].无机材料学报,2011,26(11):1147-1151,5.基金项目
国家自然科学基金重点项目(50671012) （50671012）
