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Microstructural analysis of the polyvinyl alcohol template on the porosity of nanocrystalline alumina prepared by sol-gel method

Zoltán Ecsedi 1Ioan Lazău Cornelia Păcurariu Paul C. Barvinschi 2

1. Politehnica University of Timişoara, P-ţa Victoriei no. 2, Timisoara 300006, Romania
2. West University of Timisoara (UVT), Bd.V. Parvan nr.4, Timisoara 300223, Romania

Abstract

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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Related papers

Presentation: Poster at E-MRS Fall Meeting 2008, Symposium F, by Zoltán Ecsedi
See On-line Journal of E-MRS Fall Meeting 2008

Submitted: 2008-04-24 11:00
Revised:   2009-06-07 00:48