International Congress of Chemistry and Environment
Abstract
In this study, the effect of Lanthanum oxide doped tin
oxide (La2O3/SnO2) surface modification by Pt synthesized
in the structural properties of SnO2 was presented. Samples
(2wt.% La2O3, SnO2, 2 wt.% La2O3, SnO2, 1 wt.% Pt)were
prepared using the ball milling method with m-xylene
medium and they were calcined under700 °C. The thick
film resistive paste based on SnO2 was fabricated on
alumina substrate using screen printing technique. In order
to prepare the printable thick film paste, the calcined
resistive powders were mixed with organic vehicle and
glass frit on alumina substrate with good rheology.
Afterward, thermal treatment (drying and firing) was
applied to dry the solvant from the printed paste and
bonding the resistive paste on alumina substrate. The
particle size and crystallinity of samples were characterized
using X-Ray Powder Diffraction (XRD) spectroscopy and
Transmission Electron Microscopy (TEM). TEM results
illustrate that the obtained material are nanoparticles in
spherical shape and the size of particles decreases with
addition of Pt. The XRD pattern results show that the
prepared samples are the nanopowders with almost
spherical crystalline structure. The thick film surface
morphology was investigated by Field Emission Scanning
Electron microscopy (FE-SEM) before and after Pt doping
and Energy Dispersive X-Ray spectroscopy (EDX) was
used to determine the elemental composition.The results
proved the nanometric size of all particles and it illustrated
that the particle size of materials decreased with the
addition of Pt on La2O3/SnO2
