Phase transition and crystal structure of zirconia

Zirconia ceramics are used for a variety of applications as catalysts, structural materials, and electrolytes for solid-oxide fuel cells. Zirconia (zirconium dioxide ZrOg) exhibits a phase transition sequence,  

The high-temperature tetragonal phase also has a distorted fluorite-type structure with the PA /mcm space group (Figs. 1.4(c) 

2 Crystal structure of monodimc Ce, i j02 and tetragonal-monoclinic phase tran ormation in the CeO Zr02 system 

In this section the phases and their crystal structures in composition-ally homogeneous CeOj-ZrOg samples are described (Table 1.2). 

Undoped pure Zr02 has a monodinic P2i/c baddeleyite-type structure, which is a distorted fluorite-type structure. The monoclinic Ce ri 02 solid solution forms in the compositional region of 0 x 0.12 (Table 1.2 and Fig. 1.6). The phase boundary is strongly dependent on the sample processing and grain size because these factors influence the nucleation, growth, and kinetics of the 

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