Al_2O_3/ZrO_2复合粉体的制备及表征  

Preparation and Characterization of Al_2O_3/ZrO_2 Composite Powders

作　　者：朱冬冬[1] 贾建峰[1] 马中辉[1] 孙洪巍[1] 胡行[1] 杨德林[1] 

机构地区：[1]郑州大学物理工程学院,河南郑州450001

出　　处：《郑州大学学报（理学版）》2010年第2期91-94,119,共5页Journal of Zhengzhou University:Natural Science Edition

摘　　要：以Al(NO3)3.9H2O和ZrOCl2.8H2O为前躯体,NH3.H2O为沉淀剂,用共沉淀法制备出了Al∶Zr不同摩尔比的复合粉体,在不同温度下煅烧,利用TG-DSC、XRD、SEM分别对粉体进行表征,并由谢乐公式算出粉体粒度.结果表明相同煅烧温度下复合粉体的粒度随氧化锆含量的增加而增长,复合粉体中t-ZrO2的存在不仅受煅烧温度的影响而且受Al∶Zr摩尔比的制约.Using aluminum nitrate and zirconium oxychloride as precursors and ammonia as pre-cipitator, Al2O3/ZrO2 composite powders with different molar ratios of Al ： Zr are synthesized with corecipitation method and sintered with different temperature. The powders are characterized in terms of TG--DTA, XRD and SEM. The crystallite size of synthesized powders is determined using Scherrer＇s equation. The results show that granularity of composite powders increases with the zirconium oxide content, the existence of t-ZrO2 is not only influenced by the calcing temperature, but also restricted by the molar ratios of Al：Zr.

关 键 词：共沉淀 Al2O3/ZrO2 复合粉体 

分 类 号：O469[理学—凝聚态物理]