The influence of sodium sulfate, as an activator, on the hydration of calcium aluminate cement (CAC)–fly
ash (FA)–silica fume (SF) composites was investigated. Different mixes of CAC with 20% pozzolans (20%
FA, 20% SF and 10% FA + 10% SF) were prepared and hydrated at 38 C for up to 28 days. The hydration
products were investigated by XRD, DSC and SEM. The results showed that sodium sulfate accelerated
the hydration reactions of calcium aluminate cement as well as the reactions of FA and SF with CAH10

Nanostructures thin films of six different compositions (Bi2S3)1-x (PbS)x have been prepared by chemical bath
deposition (CBD)from solution onto glass substrates. The nominal compositions in the range [0.1 ≤ x ≤ 0.85] were
confirmed by Atomic Absorption Spectroscopy (AAS). X- Ray powder diffraction indicated different crystal
structures for thin films of different compositions, while a large amorphous component was present. X-ray
diffraction for as deposited and annealed samples showed that the crystallinity increases dramatically upon heat