柠檬酸法制备热障涂层用La_2Ce_2O_7粉体  

Preparation of La_2Ce_2O_7 Powder by Citric Acid Method for Thermal Barrier Coatings

作　　者：张红松[1,2] 廖肃然[1] 杜红莉[3] 

机构地区：[1]河南工程学院,河南郑州451191 [2]郑州大学,河南郑州451191 [3]石家庄经济学院,河北石家庄050031

出　　处：《稀有金属材料与工程》2011年第S1期481-484,共4页Rare Metal Materials and Engineering

基　　金：河南省教育厅自然科学研究计划项目(2010A430001);河南工程学院博士基金项目(D2007012);河北省水资源可持续利用与开发重点实验室开放基金(W1012)

摘　　要：以ZrO(NO3)2·2H2O、Ce(NO3)·6H2O和La2O3为原料,采用柠檬酸法制备了La2Ce2O7粉体,研究了pH值、乙二醇及柠檬酸用量、煅烧温度等工艺参数对La2Ce2O7粉体的影响。结果表明,采用该方法能够制备纯净的La2Ce2O7粉体,最佳实验条件是pH值为5,乙二醇、柠檬酸与金属离子的摩尔比分别是1.8和2,煅烧温度为400℃。Using ZrO(NO3)2.2H2O, Ce(NO3). 6H2O and La2O3 as reactants, La2Ce2O7 powder was prepared by citric acid method. Many technical parameters affecting the properties of this powder, such as pH value, amounts of glycol and citric acid, and calcining temperature, were investigated. Pure La2Ce2O7 powder was synthesized successfully using this method. The optimum experimental conditions to prepare La2Ce2O7 powder are as follows: pH value 5, the mol ratios of glycol/metal ions and citric acid/metal ions 1.8 and 2 and 400°C calcining temperature.

关 键 词：热障涂层 柠檬酸法 La2Ce2O7 

分 类 号：TG174.4[金属学及工艺—金属表面处理]