Effect of TiO2 doping on the characteristics of macroporous Al2O3/TiO2 membrane supports

A cost-effective tubular macroporous ceramic support consisting of alumina and titania was prepared by extrusion and subsequent heat treatment. An Al2O3/TiO2 composite support with high porosity (41.4%), an average pore size of 6.8 micron and sufficient mechanical strength (32.7 MPa) was obtained af...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the European Ceramic Society 2010-04, Vol.30 (6), p.1317-1325
Main Authors: Qi, Hong, Fan, Yiqun, Xing, Weihong, Winnubst, Louis
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A cost-effective tubular macroporous ceramic support consisting of alumina and titania was prepared by extrusion and subsequent heat treatment. An Al2O3/TiO2 composite support with high porosity (41.4%), an average pore size of 6.8 micron and sufficient mechanical strength (32.7 MPa) was obtained after sintering at 1400 C. The formation mechanism of this support, as investigated by X-ray micromapping, SEM and XRD, indicated that the appearance of Al2TiO5 played a key role in the fabrication of high performance composite membrane supports at relatively low temperatures. The amount of Al2TiO5 present in the composite had a strong impact on the properties of the supports, especially with regard to the mechanical strength. A composite of 85 wt% Al2O3/15 wt% TiO2 sintered at 1400 C for 2 h had both high permeability (pure water flux of 45 m3/m2/h/bar), together with excellent corrosive resistance towards hot NaOH and HNO3 solutions.
ISSN:0955-2219
DOI:10.1016/j.jeurceramsoc.2009.12.011