Urea Formaldehyde as a Precursor for the Preparation of Titania by Sol Gel Polymeric Route

Nanosize TiO2 particles were prepared by the reaction of TiCl3 with urea formaldehyde during polymerisation. The reaction temperature, concentration, pH and time were optimised. Different concentration of Ti4+ can be substituted in the resin structure (up to 4 mol equivalent TiO2). Resins were calci...

Full description

Saved in:
Bibliographic Details
Published in:Key engineering materials 1997, Vol.132-136 (1), p.22-25
Main Authors: Mostafa, Amani A., Ibrahim, Doreya M., Khalil, T.
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Miscellaneous
Technical ceramics
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Nanosize TiO2 particles were prepared by the reaction of TiCl3 with urea formaldehyde during polymerisation. The reaction temperature, concentration, pH and time were optimised. Different concentration of Ti4+ can be substituted in the resin structure (up to 4 mol equivalent TiO2). Resins were calcined at different temperatures, and the powders obtained were characterised by XRD, TEM, SEM and Hg porosimetry. Anatase was detected at 500 C, readily transforming totally to rutile at 900 C. The TiO2 grains are equigranular, as shown by TEM. Powders show a pore size distribution in the submicron capillary fraction with an increase in the content of cation substituted in the host resin up to 3 mol equivalent, then coarsening. The mean pore diameter reaches 0.05 micron. Powders produced from low cation resin showed better sinterability at 1450 C, reaching 95% theoretical density. 5 refs.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.132-136.22