Reduced Activation Energy For Grain Growth In Nanocrystalline Yttria-Stabilized Zirconia
Nanocrystalline (∼15-20 nm) 3 mol % yttria-stabilized zirconia (3YSZ) powder is synthesized via sol-gel technique. A reduced activation energy value of ∼13.0 ± 0.9 kJ/mol is observed for grain growth in nano-3YSZ powder, within the calcination temperature range of 400-1200°C, which is much lower than that (580 kJ/mol) reported for submicron/micron-sized 3YSZ. This is attributed to large oxygen-ion vacancy concentration in nano-3YSZ.
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Shukla, Satyajit; Seal, Sudipta; and Vij, Rashmi, "Reduced Activation Energy For Grain Growth In Nanocrystalline Yttria-Stabilized Zirconia" (2003). Scopus Export 2000s. 1826.