Preparation and characterization of ceria partially stabilized zirconia ceramics. (March 2019) - Zhao, Liang
Abstract: The ceria partially stabilized zirconia (Ce-PSZ) ceramics with 7wt%, 10wt%, and 13wt% CeO2 stabilizing agent were prepared under industrial conditions. The relationship between the content of CeO2 and the physics property, mineral composition, and microstructure of zirconia metering nozzles was investigated through X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). The results show that with the increasing content of CeO2, the apparent porosity of samples increases, the bulk density and compressive strength decreases, the thermal shock resistance first increases and then decreases; meanwhile, m-ZrO2 is transformed into c-ZrO2 and the degree of stability is improved. However, excess c-ZrO2 will lead to abnormal growth of zirconia particles, which lead to reduction of compressive strength and apparent porosity increasing. Thermal shock resistance of Ce-PSZ is sensitive to the addition of CeO2 . The best thermal shock resistance can be obtained with the addition of 10wt% CeO2 stabilizing agent, which is 1.5 times that of the sample with 7wt% CeO2 and 3 times that of the sample with 13wt% CeO2 .