(中南大学 冶金与环境学院，长沙 410083)
摘 要: 采用水热水解法制备粒径可控的钇稳定四方相氧化锆(Y-TZP)粉末，考察水热时间、温度和H+浓度对Y-TZP前躯体粉末颗粒粒径及其分布的影响。结果表明:水热水解法制备的Y-TZP前驱体粉末为单斜相，分散性好，颗粒粒径为50~300 nm；水解水热反应进程越充分，前驱体颗粒平均粒径越大，陈化导致其粒径分布变宽。在实验的浓度(0.485 mol/L ZrOCl2、0.03 mol/L YCl3)和温度(130~150 ℃)范围内，升高温度，前驱体颗粒平均粒径从186.2 nm降低为94.1 nm，且其分布变窄；H+浓度对前驱体颗粒平均粒径影响明显，提高H+浓度，前驱体颗粒的平均粒径先增大后减小。水热水解法制备的Y-TZP前驱体滴氨掺钇后，于1000 ℃煅烧1 h得到钇稳定四方相氧化锆(Y-TZP)粉末，粒径约为120 nm，且其分布较窄。
关键字: 氧化锆；Y-TZP前躯体；水热水解；粒径；分布
（School of Metallurgy and Environment, Central South University, Changsha 410083, China）
Abstract:Yttria-stabilized tetragonal zirconia polycrystal(Y-TZP) powders of controllable sizes were prepared by hydrothermal hydrolysis process. The effects of hydrothermal time, temperature and H+ ions concentration on the particle sizes and their distributions of the Y-TZP precursor powders were investigated experimentally. The results show that the Y-TZP precursor powders prepared by hydrothermal hydrolysis are monoclinic with good dispersion, and the particle sizes are 50-300 nm. The average particle size of the Y-TZP precursor increases as the reaction progresses more fully, while aging will broaden the particle-size distribution of the Y-TZP precursor. At the range of experimental concentrate (0.485 mol/L ZrOCl2, 0.03 mol/L YCl3) and temperature (130-150 ℃), when the temperature increases from 130℃ to 150 ℃, the average particle sizes of the Y-TZP precursor decrease from 186.2 nm to 94.1 nm, and the particle-size distributions become narrow. The concentrations of H+ ions affect the average particle sizes of the Y-TZP precursor significantly, and the average particle sizes of the Y-TZP precursor increase at first, and then decrease with the increase of H+ ions concentration. Yttria-stabilized tetragonal zirconia powders (Y-TZP) are obtained by doping the precursor powders with yttria through ammonia titration and then calcining them at 1000 ℃ for 1 h. The average particle size is 120 nm, and the size distributions become narrow.
Key words: zirconia; Y-TZP precursor; hydrothermal hydrolysis; particle size; distribution
