摘要：采用阳极氧化法制备Y掺杂氧化铈膜，研究了Y浓度、温度、电流密度和氨水浓度对Y掺杂氧化铈膜厚度的影响；热处理温度对Y掺杂氧化铈膜物相的影响。分别用XRD和IR对Y掺杂氧化铈膜进行表征，并对Y掺杂氧化铈膜测定了电导率。研究结果表明：在Na2C2O4-氨水-水乙二醇电解液中制备Y掺杂氧化铈膜的较好的制备工艺为：Y浓度2.4mmol/L，温度24℃，电流密度0.3mA/cm2，氨水浓度3.1mol/L，在该条件下制备的Y掺杂氧化铈膜厚度为18.6μm。当温度为550℃，Y浓度为2.4mmol/L，时，Y掺杂的氧化铈膜的电导率为1.1×10-4S/cm。XRD结果表明：阳极氧化法制得的Y掺杂氧化铈膜的晶型结构为立方萤石型。400℃下对Y掺杂氧化铈膜热处理2h，Y掺杂CeO2晶型完整。红外的结果表明：阳极氧化法得到的Y掺杂氧化铈膜的表面含有少量的水和乙二醇，300℃热处理后，Y掺杂氧化铈膜表面的水和乙二醇消失。62148

本文创新之处：阳极氧化法制备Y掺杂氧化铈膜的研究未见报道；Na2C2O4-氨水-水乙二醇电解液体系中制备Y掺杂氧化铈膜未见报道。

毕业论文关键词：SOFC；CeO2；阳极氧化；稀土

 Preparation and characterization of Porous Cerium Oxide Membranes of Y doped by Anodization

Abstract：In this paper, anodized cerium membrane was prepared by anodization method. The technological parameters on thickness of anodized cerium membrane were studied, as follows, current density, ammonia concentration, temperature. The anodized cerium membrane of Y doped was prepared by anodization method. The technological parameters on thickness of anodized cerium membrane of Y doped were studied, as follows, Yconcentration, temperature, current density, ammonia concentration. The effects of heat-treated temperature on phase structure of anodized cerium membrane were studied. The effects of heat-treated temperature on phase structure of anodized cerium membrane of Y doped were studied. Surface morphology, composition and phase structure of anodized cerium membrane were characterized by SEM, XRD and IR respectively while conductivity were measured.

The research results showed that the better process parameters of preparation of anodized cerium membrane in sodium oxalate -ammonia - glycol electrolyte are studied, as follows: The better process parameters of preparation of anodized cerium membrane of Y doped in sodium oxalate - ammonia - glycol electrolyte were studied, as follows: Y concentration was 1.4mmol/L, temperature of anode oxidation was 24℃,current density was 0.5mA/cm2, ammonia concentration was 4.1mol/L. Under this condition, the thickness of the prepared cerium oxide film was 18.5μm. The electrical conductivity of cerium oxide membrane, Y doped cerium oxide membrane was 7.4×10-5S/cm, When the temperature was 550℃. XRD results showed that cerium oxide membrane of Y doped prepared in sodium oxalate - ammonia - ethylene glycol aqueous solution was composed CeO2, which was cubic fluorite structure ; The crystal of CeO2 is completed after it was calcined at 400℃ for 2 hours. IR results showed that the ethylene glycol and water was adsorbented on surface of cerium oxide membrane of Y after heat treatment at 200℃.

 The innovation points of this paper: anodized cerium membrane of Y Gd doped prepared by anodization had not been reported yet; anodized cerium membrane prepared in sodium oxalate - ammonia - ethylene glycol aqueous solution had not been reported yet. 

Key words: SOFC ; CeO2 ; anode oxidation ; rare earth

目录

1前言 1

 1.1 固体氧化物燃料电池的介绍..1

 1.2 固体氧化物燃料电池的发展..3

 1.3 固体氧化物燃料电池的电解质材料..4

   1.3.1 LaGaO3 基电解质 5