Effect of Peptization on Texture and Physicomechanical Properties of Aluminum Hydroxides

The method of low-temperature adsorption of nitrogen was applied to study structural characteristics of commercial peptized aluminum hydroxides. An increase or decrease in the porometric volume, depending on the nature and concentration of the peptizing agent, was analyzed. The phenomena observed are explained in terms of the mechanism suggested for formation of the pore system in commercial aluminum hydroxides. The dependence of the physicomechanical properties of active aluminum oxide on synthesis conditions and texture characteristics of commercial aluminum hydroxides was studied.     

Effect of Deposition and Stabilization Conditions on the Texture Properties of Aluminum Hydroxides

Methods of low-temperature adsorption of nitrogen and X-ray phase analysis were applied to study structural characteristics of aluminum hydroxides synthesized under industrial conditions. A mechanism of formation of the porous structure of aluminum hydroxides was suggested.     

Analysis of the phase composition and an XRD study of industrial aluminum hydroxides

A quantitative phase analysis of aluminum hydroxides was performed by varying and optimizing parameters of the constituent crystalline phases so as to fit the measured and calculated XRD patterns. It was concluded that the system most probably consists of gibbsite crystalline structures and two pseudoboehmite forms.     

Formation of the Morphology of Continuous-Precipitation Aluminum Hydroxides in the Course of Industrial Synthesis

X-ray phase and differential thermal analyses were used to study in detail how the morphology of aluminum hydroxides changes in separate stages of the technological process. The assumption that two pseudoboehmite modifications differing in crystallite dimensions and lattice constants can be formed in the course of precipitation was considered.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 2, 2005, pp. 177–184.Original Russian Text Copyright © 2005 by Lamberov, Aptikasheva, Egorova, Levin, Gil’manov.