电泳沉积制备复合（设计） 大学论文.doc

xx工业大学毕业论文 题目β-Al2O3 学生姓名 学号 专业 金属材料与工程 班级 金属 指导老师 教授 2013年6月 电泳沉积制备复合β-Al2O3 摘要 电泳沉积是指在胶体溶液中对电极施加电压时，胶体粒子移向电极表面放电而形成沉积层的过程。β-的钠离子电导率远高于β-，β相的纯度越高，电性能越好，这使得它在能源领域中有重要应用本研究将β-固体电解质结构改为复合式，由致密层和多孔基体层组成多孔基体允许钠离子自由通过，实际电阻取决于致密β-层。本实验以β-Al2O3粉料和杂1%TiO2的β-Al2O3粉料为原料，正戊醇为溶剂，三乙醇胺为分散剂，硬脂酸铝为多孔层的造孔剂，用电泳沉积法制备β-Al2O3复合电解质。复合电解质由致密层与多孔层构成，通过本实验得知：在沉积电压为200V和沉积时间为300S、三乙醇胺的加入量为β-Al2O3粉料质量的10%时，致密层结晶完善，粒径，致密度高；在复合层中加入β-Al2O3粉料质量1%的硬脂酸铝，进行共沉积，烧结过程中硬脂酸铝分解，可以使晶粒细化，并形成的空隙。由于钠离子可以在多孔层空隙中穿过，由致密层与多孔层形成的复合电解质相对于单一的致密层有着较高的电导率，且β-Al2O3复合电解质的电导率随着加热温度的升高而提高，材料的活化能为0.5eV。 关键词：电泳沉积 β″- Fabrication of electrophoretic deposition composite β- Abstract Electrophoretic deposition（EPD） refers to the colloidal solution in the voltage applied to the electrodes, the electrode toward the surface of the colloidal particles deposited layer formed by the discharge process. β- the sodium ion conductivity higher than β-, β phase, the higher the purity, the better electrical properties, which makes it in the energy sector has important applications. In this study, β-solid electrolyte structure to a compound by a dense layer and a porous substrate layer, a porous substrate to allow free passage of sodium ions, the actual resistance depends dense β- layers. This experiment to β-Al2O3 powder and 1% TiO2 doped of β-Al2O3 powder as a raw material, n-amyl alcohol as the solvent as dispersant triethanolamine stearate, aluminum pore porous layer, EPD method β-Al2O3 composite electrolyte. Composite electrolyte layer and a porous layer of dense structure, by this experiment that: the deposition voltage of 200V and a deposition time of 300S, TEA is added in an amount β-Al2O3 powder, 10% by mass, the crystallization and the dense layer, uniform particle size, high density;, the composite layer was added β-Al2O3 powder mass of 1% aluminum stearate added in an amount of β-Al2O3 powder mass to 1% polyacrylic acid is not added