Ceria and Other Rare Earth-Stabilized Zirconias

4 Ceria and Other Rare Earth-Stabilized Zirconias 

In order to obtain fully dense ceramics, it is necessary to use ultrafine powders that are normally prepared by the coprecipitation of precursors. The presence of liquidforming additives, such as Ca and Si, is also often required. Although this material 

Ce-TZ P is rarely used as a monolithic material due to its relatively low level of hardness and strength. 

The Zr02-Gd0i 5 system is important for the development of ceramics for thermal barrier coatings (TBC), other than the state-of-the-art yttria-stabilized zir-conia (YSZ), which has a lower thermal conductivity and improved high-temperature performance and durability [188]. 

Scandia-stabilized zirconia (ScSZ) possesses the highest oxygen-ion conductivity among all zirconia-based oxides, and therefore represents a promising solid electrolyte for applications in electrochemical devices such as solid oxide fuel cells (SO PCs) and catalytic membrane reactors (further details are available in Section 1.6.6.3). 

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