A significant enhancement in sintering activity of nanocrystalline Ce0.9Gd0.1O1.95 powder synthesized by a glycine-nitrate-process
- A significant enhancement in sintering activity of nanocrystalline Ce0.9Gd0.1O1.95 powder synthesized by a glycine-nitrate-process
- 다사리하리; 손지원; 김병국; 이해원; 이종호
- SOFC; GDC; GNP; nano powder; Oxides; Combustion Synthesis; Nano-crystalline GDC; Electron microscopy; Electrical conductivity
- Issue Date
- Journal of ceramic processing research
- VOL 11, NO 2, 176-183
- Using a glycine nitrate process (GNP), nanocrystalline GDC powder has been successfully prepared that can be sintered at
1200 ℃ to a relative density of 97% which is a significantly lower sintering temperature compared to that of conventional
ceria-based electrolytes prepared by traditional solid state techniques. The effect of the glycine content on the particle size,
morphology, and sintering behavior has been studied by changing the glycine-to-nitrate (G/N) ratio during the combustion
synthesis. A range of techniques including thermal gravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR),
X-ray diffraction (XRD), specific surface area determination (BET), particle size analysis (PSA) and scanning electron
microscopy (SEM) were employed to characterize the GDC powders prepared. From the dilatometric studies, it is observed
that the GDC powders prepared with a G/N ratio 0.55 show superior sintering activity compared to GDC powders prepared
with a lower G/N ratio. A sintered GDC sample showed an ionic conductivity of 2.01 × 10−2 S/cm at 600 ℃ in air.
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