超临界流体干燥法制备纳米ZrO2粉体及其煅烧行为研究

摘要

The preparation of Nano Zirconia powder with the supercritical fluid drying (SCFD) method in different heat treatment process and the sample analysis of TEM and XRD results show that the heat temperature and time on properties of Nano-ZrO2 powders effect is significant. With the increase of heat treatment temperature and time, powder transition from t phase to m phase, grain size is gradually increasing, but heat treatment temperature greatly has the more effect on the ZrO2phase composition and grain size than time.%用超临界流体干燥法制备了纳米ZrO2粉体,并用不同热处理工艺进行处理,之后对样品进行TEM和XRD分析.结果表明,煅烧温度和煅烧时间对纳米ZrO2粉体性能的影响是显著的.随着煅烧温度的提高和时间的延长,粉体由t相转变为m相,晶粒尺寸逐渐增大,但是煅烧温度对ZrO2相组成和晶粒尺寸的影响比时间的影响更大.