La_2O_3-CeO_2-ZrO_2粉的制备及性能  

Preparation and Behavior of La_2O_3-CeO_2-ZrO_2 Powders

作　　者：刘喜华[1] 毛红[2] 宋波[1] 傅强[3] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]北京科技大学材料科学与工程学院,北京100083 [3]北京有色金属研究总院,北京100088

出　　处：《北京科技大学学报》2004年第4期404-406,共3页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助课题(No.50246013)

摘　　要：利用化学共沉淀法制取锆酸镧(La2Zr2O7,简称LZ)和La2O3-CeO2-ZrO2(简称LCZ)热障涂层喷涂粉,采用电感耦合等离子体光谱仪(ICP-AES)对粉的化学成分进行分析,用X射线衍射仪分析LZ,LCZ的物相组成,用差式扫描量热法研究粉的高温相稳定性.结果表明:LZ,LCZ粉均为烧绿石结构;高温下LZ,LCZ无明显相变.Lanthanum zirconate (La2Zr2O7, LZ) and La2O3-CeO2-ZrO2(LCZ) powders for thermal barrier coatings were prepared by coprecipitation. The chemical composition of the powders were analyzed by means of Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES). Crystallographic phases were determined by X-ray diffraction technique. Differential Scanning Calorimetry (DSC) was used to analyze the phase stability at high temperatures. The results showed that both LZ and LCZ powders kept the pyrochlore structure and there were no phase transformations for LZ and LCZ at high temperatures.

关 键 词：锆酸镧 热障涂层 化学共沉淀法 

分 类 号：TB323[一般工业技术—材料科学与工程] TH117[机械工程—机械设计及理论]