Showing 1 results for Uv-Vis.
M. Khosravi Saghezchi, H. Sarpoolaky, F. Heshmatpour,
Volume 5, Issue 2 (6-2008)
Abstract
Abstract: Lead-containing glass borosilicate was synthesized by Sol-gel technique using
metalalkoxids such as tetraethyleorthosilicate (TEOS), Al-sec-butoxide and trimethyl borate. The
sol containing TEOS converts to gel during drop wise addition of Al-alkoxide while inorganic lead
salt was added in the last stage of gelation to prepare the alcogels. The specimens were dried at
room temperature to set then heated at 600°C quickly to avoid crystallization preparing a glass
containing 63 wt% lead oxide. The influence of pH on absorption behavior of the sols studied by
UV visible technique so the characteristic of the gel, alcogel and xerogel were studied in the
different acidic concentrations. The UV spectrums show that the higher the acidity of the
hydrolysis stages, the higher the absorbance. The results showed the sample with 63 wt% lead was
found fully amorphous. Microstructure and phase analysis of the glass powders were investigated
by X-ray diffraction (XRD), X-ray fluorescence (XRF) and scanning electron microscopy (SEM)
equipped with EDS analysis.
