THERMAL, STRUCTURAL AND OPTICAL-PROPERTIES OF (CDS)-NA(86)X COMPOSITES

Thermal, structural and optical properties of CdS superclusters grown in zeolite Na(86)X are reported. The interest in this work arose in th e need to study CdS prepared in the zeolite host, at high concentratio ns (>19%), in order to observe porosyte behaviour and CdS aggregate pr operties. The semiconductor-zeolite composite was studied using X-ray diffraction analysis and photoacoustic technique (PAS). The properties of semiconductor CdS embedded in a zeolite matrix were analysed as a function of the CdS concentration by monitoring Cd concentration (atom %) by chemical analysis. The results show that as the concentration of CdS increases, the thermal diffusivity, capacity, conductivity and th e band-gap increase up to a point where the zeolite lattice collapses. From this point on, all these thermal properties diminish and the ban d-gap is the same as for bulk CdS.