论文部分内容阅读
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。
In order to study and characterize the intrinsic properties of zirconia solid solution powders, a series of ZrO2-TiO2-Y2O3 ternary system solid solution nanopowders were prepared by chemical coprecipitation method. The solid solution powders were single tetragonal phase with XRD, TEM and BET. The grain size was in the range of 10-25 nm. With the increase of solid solution, the value of a decreased, the value of c increased and the value of c / a increased. Due to the surface effect of nano-powder unsaturated, t-ZrO2 nano-powder can make the solid solution mole fraction of 40% of TiO2, after sintering, the solid solution doping mole fraction of 20% TiO2 porcelain has appeared ZrTiO4 phase.