Modified Sol-gel production of Nano SDC20 Materials

摘要

The production of high purity samarium doped ceria (SDC20, Sm_(0.2)Ce_(0.8)O_(2-δ)) nanopowders by modified sol-gel process using maltose and pectin as organic precursors. Around, 6 nm particle size can be obtained after calcination of the as synthesized (pre dried) gel at 500°C for 2 h. Rietveld refinement of Powder X-ray diffraction (XRD) patterns confirms the cubic structure with single phase. Chemical composition of SDC20 is in good agreement with EDX measurements. TEM and XRD analysis indicate the influence of sintering temperature on particle size, which increases with increasing temperature. This modified sol-gel process is a non-toxic and environmentally friendly for large-scale production of high purity nanopowders.