张翠娟;赵海雷;王治峰;李雪;沈薇;

• 1:北京科技大学材料科学与工程学院无机非金属材料系

摘要(Abstract)：

分别通过溶胶-凝胶法和高温固相反应法制备了BaCe0.5Zr0.4Y0.1O3-δ粉体。采用热重-差热分析(TG-DTA),粉末X射线衍射(XRD),扫描电子显微镜(SEM),傅立叶红外衍射(FT-IR),N2吸附-脱附等方法对所制备的粉体进行了表征。结果表明:用溶胶-凝胶法在1200℃×10 h可以合成纯的BaCe0.5Zr0.4Y0.1O3-δ粉体,合成温度比传统的高温固相反应法降低400℃左右;溶胶-凝胶法合成粉体具有多孔结构特征,与固相法合成粉体相比具有较高的比表面积。但致密化试验表明:溶胶-凝胶法合成粉体与固相法合成粉体相比具有较低的烧结活性。溶胶-凝胶法合成粉体颗粒表面残余的有机基团和颗粒内部的大量微孔将在致密化过程中产生空间位阻,从而影响高温下原子的迁移,阻碍材料的致密化过程。

关键词(KeyWords)： 高温质子导体;BaCe0.5Zr0.4Y0.1O3-δ;溶胶-凝胶法;高温固相反应法;稀土

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目

作者(Authors): 张翠娟;赵海雷;王治峰;李雪;沈薇;

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