Twofold Description of the Texture of Aluminium Oxides Prepared by the Sol-Gel Method

摘要

To date, a complete assessment of the so-called pore-size distri-bution by adsorption methods has, in general, not been accomplished. This is because the diverse capillary phenomena involved in such a description of the porous structure usually undergo cooperative and/or percolative interactions which hinder complete characterization, The object of the present work was to suggest a general method for the analysis of texture and to provide specific examples which identify and describe some of the problems and possibilities of the textura.1 char-acterization of porous substrata from vapour adsorption studies. A series of alumina products of very assorted morphologies were synthesized using a modifiedYoldas sol-gel method, and used to demonstrate important morphological and mechani-cal aspects of the pore structure from the observation and analysis of their nitrogen adsorption hysteresis loops at 76 K.