摘要：本文采用阳极氧化的方法来制备Gd掺杂的氧化铈膜，分别研究了Gd3+浓度、氨水浓度、电流密度和温度对Gd掺杂的氧化铈膜厚度的影响。用SEM、EDX、XRD和IR分别对Gd掺杂的氧化铈膜进行表征，并测定了Gd掺杂的氧化铈膜的电导率。研究结果表明，在Na2C2O4-氨水-水乙二醇电解液中制备Gd掺杂的氧化铈膜的较佳工艺条件为：Gd3+浓度3mmol/L，电流密度0.5mA/cm2，阳极氧化温度24℃，氨水浓度3.1mol/L，在该条件下制备的Gd掺杂的氧化铈膜厚度为22.2μm。当温度为550℃时，较佳工艺条件下制备的Gd掺杂的氧化铈膜的电导率为1.5×10-4 S/cm。EDX的表征说明实验制备的样品为Gd掺杂的氧化铈膜。XRD的表征说明Gd掺杂的氧化铈膜为立方萤石结构的CeO2，热处理400℃之后，CeO2的晶粒已经发育完整。SEM的表征说明Gd掺杂的氧化铈膜的表面呈多孔结构。IR的表征说明Gd掺杂的氧化铈膜表面吸附着乙二醇和水，200℃热处理之后，表面吸附的乙二醇和水已经脱附。43688

毕业论文关键词：阳极氧化；Gd3+；SOFC；CeO2

 Technology Study of preparaing the anodized cerium membrane of Gd doped

Abstract: In this article, the anodized cerium membrane of Gd doped was prepared by anodization method. The effects on the thickness of anodized cerium membrane of Gd doped, which included the concentration of Gd3+, the concentration of ammonia, the current density and temperature were studied. The anodized cerium membrane of Gd doped were characterized by SEM, EDX, XRD and IR. Besides, the electrical conductivity also were measured The research showed that the better process condition of preparing anodized cerium membrane of Gd doped in sodium oxalate-ammonia-glycol electrolyte is 3mmol/L Gd3+, 0.5mA/cm2 current density, 24℃ temperature of anode oxidation and 3.1mol/L ammonia concentration. The thickness of the prepared Gd doped cerium oxide membrane was 22.2μm under this condition. When the temperature was 550℃, the electrical conductivity of prepared Gd doped cerium oxide membrane under the better process condition was 1.5×10-4 S/cm. The characterization of EDX showed that the samples parpared in experiment were the anodized cerium membrane of Gd doped. The characterization of XRD showed that cerium oxide membrane of Gd doped was composed CeO2 with cubic fluorite structure, The crystalline grain of CeO2 had been completed after it was calcined at 400℃ for 2 hours. The characterization of SEM showed that the surface of cerium oxide membrane of Gd doped was porous structure. The characterization of IR showed that the ethylene glycol and water was adsorbented on surface of cerium oxide membrane of Gd doped. Ethylene glycol and water were desorbed on the surface of cerium oxide membrane of Gd after heat treatment at 200℃.

KeyWords: anode oxidation；Gd3+；SOFC；CeO2

目录

1 绪论 1

1.1固体氧化物燃料电池的简介 1

1.2 SOFC的发展趋势 2

1.2.1 操作温度的中低温化 2

1.2.2 电池的构型 2

1.3 固体氧化物燃料电池的电解质材料 3

1.3.1 氧化锆基电解质 3

1.3.2 钙钛矿ABO3型电解质 4

1.3.3 磷灰石基电解质 4

1.3.4 氧化铈基电解质 5

1.4 氧化铈基电解质膜的制备方法 7

1.4.1 溶胶凝胶法 7

1.4.2 流延法 8

1.4.3 丝网印刷法