t-ZrO_2-TiO_2固溶体纳米粉的制备  

Preparation of t-ZrO_2-TiO_2 solid solution nanosized powder

作　　者：翟华嶂[1] 李建保[1] 欧阳可青[1] 曹俊[1] 张淑霞[1] 

机构地区：[1]清华大学材料科学与工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2003年第6期758-761,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(59972014)

摘　　要：为了研究和表征氧化锆固溶粉体的本征特性,利用化学共沉淀方法制备一系列ZrO2-TiO2-Y2O3三元体系的固溶体纳米粉。通过X射线衍射、透射电镜分析和比表面积测量确定固溶粉体为单一四方相结构,晶粒尺寸在10～25nm。固溶纳米粉体随TiO2固溶量增加,晶格常数中a值下降,c值上升,c/a值呈上升趋势。由于纳米粉体表面效应的不饱和性,可使t-ZrO2纳米粉中固溶摩尔分数为40%的TiO2,烧结后,固溶掺杂的摩尔分数为20%TiO2的瓷体中已出现ZrTiO4相。The properties of zirconia solid solution powders were characterized with a series of ZrO2TiO2Y2O3 nanosized powders synthesized by chemical coprecipitation. XRD (XRay Diffraction) showed that powders were tetragonal solid solutions. The average particle size was 10～25 nm as determined by TEM (Transmission Electron Microscope) and BET specific surface area measurements. With increasing TiO2 content, the lattice parameter a decreased while c increased and as a result, c/a increased. The molar fraction x of TiO2 in tZrO2 was up to 40%, because of the surface effect in the nanosized powders. The ZrTiO4 phase was observed in the ceramic materials after sintering for a solid solution x(TiO2) content of 20%.

关 键 词：t—ZrO2—TiO2固溶体纳米粉 制备方法 氧化锆 二氧化钛 表面效应 相结构 

分 类 号：TB383[一般工业技术—材料科学与工程]