低温超强碱法制备引入有机添加剂的纳米四方多晶氧化锆粉体及其性能

PREPARATION AND PROPERTIES OF NANOMETER POLYCRYSTALS ZIRCONIA POWDER BY SUPER ALKALINE METHOD AT LOW TEMPERATURE WITH ORGANIC ADDITIVES

采用引入有机添加剂的低温超强碱法,控制适当的工艺条件,得到了室温稳定的纳米四方/立方多晶氧化锆粉体。采用X射线荧光光谱、X射线衍射、透射电镜、粒度分析仪等手段对粉体性能进行了表征。实验结果表明:该粉体在室温和小于873 K热处理时,均以稳定的立方或四方相存在,粉体粒径为9 nm左右。在1 123 K处理的粉体分散性好、粒度小、粒度分布较窄,粉体颗粒的平均粒径为0.46μm。所制备的粉体具有纯度高、氯离子等杂质少等特点。与其它湿化学法相比,加入有机添加剂的低温超强碱法具有工艺操作简单、节约资源和环境污染小的优点。

The nanometer tetragonal polycrystalline zirconia powder was prepared by organic addition-assisted super-alkaline method under proper technical conditions. The properties of zirconia nanometer particles were investigated by means of X-ray fluorescence analysis (XRF), X-ray diffraction (XRD), transmission electron microscopy (TEM) and particle size analysis. Results show that the main phase of the powder is tetragonal/cubic after calcined at ambient temperature to 873 K, and the particle size is about 9 nm. After calcined at 1123 K for 3 h, the good dispersing property, small particle size and a narrow particle distribution of the powder were obtained, and the average particle size is 0.46 μm. The powder prepared is characterized by its high purity and less chlorine impurities due to the addition of polymer. Compared with other wet chemical methods, the organic addition-assisted super-alkaline method has the advantages of easy operation, saving resources and less environmental pollution.