Effect of Nb2O5 on sintering and mechanical properties of ceria stabilized zirconia

Effect of two‐step sintering on microstructure and mechanical properties of ceria‐stabilized zirconia‐toughened alumina‐added titania (CSZTA–TiO2)

“…In other words, the TSS‐1 and TSS‐2 exhibited larger grain sizes attributed to a decrease in the density and hardness of the composite 29 . In the TSS‐3 and TSS‐4 schedules, it was discovered that relative density increased and grain size decreased.…”

“…50 In other words, the TSS-1 and TSS-2 exhibited larger grain sizes attributed to a decrease in the density and hardness of the composite. 29 In the TSS-3 and TSS-4 schedules, it was discovered that relative density increased and grain size decreased. The TSS-3 and TSS-4 schedules are attributed to forming a higher amount of high-density phases, as discussed in Table 2, which results in improved density and hardness.…”

“…The second step, lowering temperature T 2 for a longer duration, restricts grain growth by immobilizing the triple‐point junctions limiting grain migration while allowing densification and removal of residual porosity through grain diffusion 5,6,21 . The TSS technique successfully modulates or alters the relationship between grain boundary migration and diffusion, leading to enhanced densification without grain growth 29 …”

“…5,6,21 The TSS technique successfully modulates or alters the relationship between grain boundary migration and diffusion, leading to enhanced densification without grain growth. 29 In addition, several studies have been carried out to improve the mechanical properties of CSZTA. The mechanical properties of CSZTA can be enhanced by adding a third phase to the matrix.…”

A Negative Effect of Niobium‐Doped Ceria on Soot Oxidation Activity‡

“…It can also be found from the SEM micrographs that the particle size of pure CeO 2 and Nb samples is smaller than that of doped samples. When Nb is doped, it acts as a sintering aid [65,66] that enlarges the particle size and decreases the surface area. Hence, Nb also increases the agglomeration size when doped into CeO 2 .…”