Structure, Microstructure, and Mixed Conduction of [(ZrO2)0.92(Y2O3)0.08]0.9(TiO2)0.1

Ionic conductivity of tetragonal ZrO2 polycrystal doped with TiO2 and GeO2

“…6, previous data for the 3 mol% Y 2 O 3 -stabilized TZP are also plotted for comparison. 22 The data for the TZP in the present study agree well with the previous ones. On the other hand, the total conductivity of TZP decreases due to the (TiO 2 -GeO 2 )-doping.…”

“…It has been reported that the ionic conductivity in air of TZP decreases with a 1-20 mol% TiO 2 addition. 22,23 The present result indicates that the (TiO 2 -GeO 2 )-doping also decreases the conductivity. The present data for the TZP do not show a single linear relationship, but consists of two linear regions with slightly different slopes; the total conductivity in the TZP exhibits a lower value for the slope at temperatures over 800 • C. High temperature bending has also been observed in the literature.…”

Influences of structure and composition on the photoelectrochemical behaviour of anodic films on Zr and Zr–20at.%Ti

“…Ge, Ti) cations with respect to Zr 4+ stabilize tetragonal zirconia and several mechanisms have been proposed in order to explain such a role [51][52][53][54][55][56][57][58][59]. As a consequence of the structural changes caused by Ti 4+ into the ZrO 2 lattice, several authors [53,[55][56][57] report that a reduction of the free oxygen vacancies occurs in TiO 2 doped zirconia. Thus, the lack of subband gap photocurrent for the anodic films on this alloy can be explained by the suppression of the defects band created by oxygen vacancies, due to their lower concentration.…”

Diffusion of niobium in yttria-stabilized zirconia and in titania-doped yttria-stabilized zirconia polycrystalline materials

“…Ti-YSZ is a promising material for SOFC electrodes as a mixed oxygen ion-electron conductor at elevated temperatures under reduced oxygen partial pressure. 14 …”