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Y0.25Bi0.75O1.5粉体的共沉淀法制备及其性能表征

Study of Coprecipitation Synthesis and Characterization Performance of Y0.25Bi0.75O1.5

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【作者】 周光明； 谢瑜； 江丽娜； 黄守国；

【Author】 ZHOU Guang-ming 1,XIE Yu 1,2,JIANG Li-na 1,HUANG Shou-guo 1,3 (1.School of Physics and Materials Science,Anhui University,Hefei 230039,Anhui,China;2.Department of Mathematics and Physics,Hefei College,Hefei 230601,Anhui,China;3.Department of Materials Science and Engineering,University of Science and Technology of China,Hefei 230026,Anhui,China)

【机构】 安徽大学物理与材料科学学院； 合肥学院数理系； 中国科技大学材料科学与工程系；

【摘要】 用草酸盐共沉淀法合成了氧化钇稳定的氧化铋(Y0.25B i0.75O1.5,YSB),用TGA-DTA法分析了初始粉体的热分解行为。在600℃和900℃下分别对初始粉体进行无压煅烧,XRD表明,在600℃时形成了单一的立方萤石结构。TEM观察了在900℃粉体的显微结构,交流阻抗法测定了在不同的温度下YSB的离子电导率。结果表明,YSB适合作为中温固体氧化物燃料电池的电解质。

【Abstract】 Yttria-stabilized bismuth oxide,Y 0.25 B 0.75 O 1.5(YSB) was synthesized by using a method of oxalate coprecipitation.The thermal decomposition behavior of YSB precursors was determined with TGA-DTA methods.The precursor powder materials were sintered by pressureless treatment at 600 ℃ and 900 ℃,respectively.XRD results show that the powder is in the form of a single cubic fluorite structure when sintered at 600 ℃.Microstructural characterization of YSB sintered at 900 ℃ was observed by transmission electron microscopy(TEM).At different temperatures,its ionic conductivity was measured with AC impedance.The results indicate that YSB may be suitable to use as electrolyte for medium temperature solid oxide fuel cells.

【关键词】 草酸盐共沉淀法； 固体氧化物燃料电池； 电解质； 离子电导率；
【Key words】 oxalate coprecipitation； solid oxide fuel cells； electrolyte； ionic conductivity；
【基金】 安徽省高校青年教师科研资助计划项目(2006jql027)
  • 【文献出处】 矿冶工程 ,Mining and Metallurgical Engineering , 编辑部邮箱 ,2009年04期
  • 【分类号】O614.322
  • 【被引频次】2
  • 【下载频次】116
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