Structure of nanoporous zirconia-based powders synthesized by different gel-combustion routes

摘要: Zirconia-based ceramics that retain their metastable tetragonal phase at room temperature are widely studied due to excellent mechanical and electrical properties. When these materials prepared from precursor nanopowders with high specific surface areas, this is retained in dense ceramic bodies. In work, we present a morphological study of nanocrystalline ZrO2–2.8 mol% Y2O3 powders synthesized by the gel-combustion method, using different organic fuels – alanine, glycine, lysine citric acid calcined temperatures ranging 873 1173 K. The nanopore structures were investigated small-angle X-ray scattering. experimental results indicate nanopores samples glycine have an essentially single-mode volume distribution for calcination up 1073 K, while those 1173 K exhibit more complex wider distribution. volume-weighted average radii monotonically increases increasing temperature. size much than others. Brunauer–Emmett–Teller technique was used determine area diffraction, environmental scanning electron microscopy transmission also employed complete characterization samples.