SYNTHESIS AND CHARACTERIZATION OF SCANDIA, YTTRIA STABILIZED ZIRCONIA (SYSZ) NANOPOWDERS BY NEW APPROACH

SYSZ nanopowders have been synthesized by new approach to Pechini s method. In this approach, zirconium oxynitrate, scandium and yttrium nitrate, citric acid and ethylene glycol monobutyl ether were used as the source of Zr , Sc , Y , the chelating and solvent agentrespectively.The microstructure of the SYSZ nanopowderscalcined at different temperatures was characterized by Xray diffractometry (XRD) and scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and inductively coupled plasma emission spectroscopy (ICP). The samples calcined at 700 °C containsemispherical shapes of the particles and the medium particles.sizes are between 20-30 nm. Optical properties of the samples in different calcinations temperature were also investigated by UV-vis diffuse reflectance spectrum (DRS).

Keywords:

Nanostructured (nanoparticle , nanocrystaline) materials , Gel combustion , Pechini s (polymeric complex) method , Sol-gel process , Scandia , Yttria Stabilized Zirconia(SYSZ)