铈稳定钪掺杂氧化锆的水热合成与结构表征  

Hydrothermal synthesis and characterization of cerium-stabilized scandium-doped zirconia

作　　者：刘宇尘[1] 陈卫平 聂东红 陈晓宇[1] 姚锐[1] 江自然[1] 郑峰[1,3] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]湖南东方钪业股份有限公司,长沙410100 [3]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2014年第5期715-720,共6页Materials Science and Engineering of Powder Metallurgy

基　　金：中南大学粉末冶金国家重实验室开放课题

摘　　要：采用水热法制备铈稳定钪掺杂氧化锆的超细纳米晶。利用X射线衍射仪、傅里叶红外光谱仪分别研究水热产物的物相和结构,结合热重-差热分析仪分析水热反应过程物相与能量的变化,通过透射电子显微镜研究pH值对水热产物颗粒大小与聚集状态的影响。结果表明,在200℃、pH=8、反应时间为3 h时,得到的水热产物为立方单相,粒径约为4nm。当pH值升高到10时,立方相的颗粒出现长大和团聚现象,平均粒径约为6nm。Ultra-fine cerium-stabilized scandium-doped zirconia nanocrystalline was prepared by hydrothermal method. The phase and structure of synthesized powders were characterized by XRD and FT-IR respectively. Hydrothermal reactions were investigated by TG-DSC analysis. The effect of pH on particle size and state of aggregation was studied by TEM. The results show that the cubic nanocrystallines with average diameters of 4 nm are obtained when precursors are treated hydrothermally at 200 ℃ for 3 h with pH of 8. When pH increases to 10, particles become agglomerated and the average sizes grow to 6 nm.

关 键 词：水热法 铈稳定钪掺杂氧化锆 纳米晶 

分 类 号：TB383.1[一般工业技术—材料科学与工程]