The behaviour of Portland limestone cement comes as a result of complex physical and chemical effects of the limestone addition at hardening. The present paper brings information on the hydration-hardening processes and the micro- and nanostructure of the hardened Portland limestone cement in correlation with its performances.

Single phase LaAlO3 fine particles were prepared by Pechini method at low-temperature. The method involved the mixing of the nitrates of La and Al, with a chelating agent, a mix 1:1 of citric acid and ethylene glycol. The powders were studied by several physical characterization techniques such as X-ray diffraction (XRD), thermal analysis (TG-DTG) and high-resolution electron microscopy (HRTEM). The TEM photographs reveal nano-particles in the size

We report here experimental studies performed on petroleum cokes to be used as anode materials for Li-ion secondary batteries. Our study is also relevant for other uses of petroleum coke include making carbon anodes for the aluminum industry, graphite electrodes for arc furnaces, polycarbonate plastics, steel, carbon refractory bricks for blast furnaces, packing media for anode baking furnaces. Three calcinated petroleum cokes were chosen to perform

The zinc sulfide was prepared using as precursors zinc complexes and thioacetamide, at room temperature. The size and morphology, crystal structure, and optical properties of the zinc sulfide were analyzed by X - ray Diffraction, Selected Area Electron Diffraction, Transmission Electron Microscopy, Fourier Transform Infrared Spectrometry, and UV - Visible Spectrophotometry. The results show that the zinc sulphide powders are constituted by crystalline