正交设计法优化掺镧钛基氧化物涂层电极的制备工艺  

Optimization for Preparation Technique of Ru-La Oxide Coating Titanium Anode by Orthogonal Design

作　　者：范农杰 竺培显[1] 周生刚[1] 韩朝辉[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《热加工工艺》2014年第12期160-162,173,共4页Hot Working Technology

基　　金：国家科技部"863计划"项目(2009AA03Z512);国家自然科学基金资助项目(51074082;51264025;51201080);云南省应用基础研究项目(KKSY201251086)

摘　　要：以RuCl和LaCl为前驱物,通过热分解法制备钛基Ru-La氧化物涂层电极。运用L25(56)的正交试验设计方案,考察了热分解温度、反应时间及La元素掺入量这三个实验因素对Ru-Ti涂层电极表面形貌和电化学性能的影响。结果表明:镧元素的加入不但使涂层表面裂纹细小,而且能够有效增强电极的电化学活性,从而达到延长电极使用寿命、提高电流效率的最终要求。制备钛基Ru-La涂层电极的最佳工艺参数为:温度500℃、时间20 min、La含量1.50%。Ru-La oxide coatings were prepared by thermal decomposition of the metal chlorides in the precursor solution of RuCl3 and LaCl3. By means of the orthogonal design method of three factors and five levels, the effects of temperature of thermal decomposition, reaction time and the content of La on the surface morphology and electrochemical properties of coated electrode were studied. The optimized conditions for the Ru-La coatings anode preparation are obtained under reaction temperature of 500 ℃, time of 20 min and La content of 1.50%. These studies show that added lanthanum not only reduces the size of the coating surface cracks, but also its electrochemical performance has also been greatly improved. This electrode achieves their final goals of extending electrode life and improving the efficiency.

关 键 词：正交实验设计 氧化物涂层 镧 RUO2 电化学性能 

分 类 号：TG146[一般工业技术—材料科学与工程]