Now showing items 1-5 of 5
Sol-gel derived mesoporous and microporous alumina membranes
Stable polymeric and colloidal boehmite sols were prepared by sol-gel process through controlled hydrolysis/condensation reactions. The particle sizes of the colloidal sols were in the 12-25 nm range depending on the process ...
Preparation and characterization of diphasic sol-gel derived unsupported mullite membranes
Diphasic gels prepared by mixing freshly prepared polymeric silica and polymeric boehmite sols through a modified Al-alkoxide route in mullite compositions led to the crystallization of mullite upon heat treatment at 775°C. ...
Permeation of pure gases through silica membranes with controlled pore structures
The superior thermal/chemical/mechanical stability and the ability of ceramic membranes in affecting the transport rates of chemical species through their processing controllable pore structures make them very attractive ...
Preparation of particulate/polymeric sol-gel derived microporous silica membranes and determination of their gas permeation properties
Monodisperse silica sols with well-defined spherical particles ranging in size from 5 to 310 nm were prepared through Stober process. Both particulate and polymeric sol-gel routes were employed for the preparation of stable ...
Preparation of monodisperse silica spheres and determination of their densification behaviour
Monodisperse silica spheres in the 50-520 nm size range were prepared by using the Stober process. Diffusive growth has been determined from Nielsen chronomal analysis for the 520 and 310 nm monodisperse silica spheres. ...