Transactions of the INDIAN CERAMIC SOCIETY Vol. 60 2001
Preparation of Porous Alumina Microspheres
by Internal Gelation Method
K. T. Pillai, R. V. Kamat and V.N. Vaidya
Pages : 150-154
Doi : 10.1080/0371750X.2001.10799990
Abstract
A new method based on sol-gel technique of internal gelation
has been described for the production of porous alumina
microspheres of controlled size in the range 200 to 1000 IJm.
Good quality alumina gel spheres were prepared directly from
aluminium nitrate solution, avoiding the sol preparation step, by
adding urea and hexamethylenetetramine as the gelling agents.
The process parameters were optimized to get the product of
desired morphology. The quality of the spheres was examined
by X-ray diffraction (XRD), thermogravimetry-differential thermal
analysis (TG-DTA), fourier transform infrared spectroscopy
(FTIR), surface area and pore-size distribution.