The effects of polyvinyl alcohol (PVA) template and calcinations temperatures on the characteristics of the alumina films were investigated. The samples were prepared by sol-gel method using aluminium triisopropylate precursor. The variation of microstructure, pore size and pore volume, were determined by nitrogen adsorption/desorption analysis, the polymorphic transformations and the crystallite sizes of alumina during the heating were studied using X-ray diffraction. The burning out process of the organic compounds and the polymorphic transformations combined with the shrinkage of the film during the thermal treatment leads to changes in the porosity and in the nanosized pores diameter. Nanocrystalline alumina with tailored surface area in range of 10-2631 m²/g and narrow distribution of pore sizes in range of 0.4-28 nm were obtained.

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