The addition of sulfur polymer (SP) and the resulting effects on the hydration and physical properties of polymer-cement mortars were investigated. Sulfur polymer-cement mortars (SPMs) with 5 wt%, 10 wt%, and 20 wt% of SPs were prepared to evaluate the compressive strength and impermeability in comparison to ordinary Portland cement mortars (PCMs). After curing for 28 days, the compressive strength of SPM with 5 wt% of SP increased by approximately 8.0% compared to PCM by hardened SP binder as well as proper hydration of hydrates. The impermeability of SPMs cured for 28 days was two times higher than that of PCM cured for the same period. The outstanding enhancement of the compressive strength and impermeability are attributed to SP additive formed inside the hydrated cement. † Electronic supplementary information (ESI) available: SEM images, schematic illustration, chemical composition and physical properties of Portland cement, experimental variable, and content of dehydrated calcium hydroxide. See
ZrTiO4 thin films were successfully prepared on Pt/Ti/SiO2/Si(100) substrates by a sol-gel process and gel films were heat-treated at various temperatures. The surface morphology, crystal structure, and dielectric properties of the thin films were investigated. It was possible to obtain ZrTiO4 phase at temperatures above 650 o C for 2 h, which is much lower than the bulk sintering temperature. The microstructure of well-crystallized ZrTiO4 thin films was a fine-grained microstructure less than 70 nm in grain size and the surface morphology was smooth with 22.4 rms roughness. The dielectric constant and loss of ZrTiO4 thin films were 38 and 0.006, respectively, for thin films with 450 nm thickness heat-treated at 900 o C for 2 h.
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