La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_(3-δ)的甘氨酸-硝酸盐燃烧法制备和表征  

Preparation and characterization of La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_(3-δ) by glycine-nitrate combustion method

作　　者：郑颖平[1] 查燕[1] 高文君[1] 孙岳明[1] 

机构地区：[1]东南大学化学化工学院,南京211189

出　　处：《中国科技论文在线》2008年第4期278-282,共5页

基　　金：江苏省高技术研究项目基金(BG2006033)

摘　　要：分别采用固相反应法、甘氨酸一硝酸盐燃烧法合成了具有钙钛矿结构的中温固体电解质La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_(3-δ)(LSGM)。用XRD、直流四电极和扫描电镜分析了电解质的晶体结构、电化学性能和显微结构。扫描电镜分析表明:用甘氨酸一硝酸盐燃烧法制备LSGM成相温度低,1400℃烧结2h即可获得单相的LSGM。SEM表明烧结体具有良好的微观结构。用甘氨酸一硝酸盐燃烧法制备的LSGM在850℃时的电导率为0.1 S·cm^(-1),高于固相反应法制备的样品的电导率。与固相反应法制备LSGM相比,用甘氨酸-硝酸盐燃烧法合成LSGM有利于降低烧结温度,提高纯度,改善电解质的性能。The intermediate-temperature electrolyte with perovskite-type La0.9Sr0.1Ga0.8Mg0.2O3-δ（LSGM） was synthesized using glycine-nitrate combustion and solid state reaction respectively.XRD,DC four-probe and SEM were applied to analyze the crystal structure,ionic conductivity and microstructure.The research results show that the single phase of the LSGM synthesized by glycine-nitrate combustion method can be obtained at a sintering temperature of 1400℃for 2 h,which is obviously lower than that of LSGM prepared by solid state reaction method. A fine microstructure in the product was detected by SEM.Its conductivity reached 0.1 S.cm^（-1） at 850℃,which is higher than that of the LSGM prepared by solid state reaction method.It can be concluded that the glycine-nitrate combustion method is favorable in lowering the sintering temperature,enhancing the purity and improving the electrical property of the LSGM

关 键 词：镓酸镧 甘氨酸-硝酸盐燃烧法 固相反应法 固体电解质 固体氧化物燃料电池 

分 类 号：TM911.4[电气工程—电力电子与电力传动]