Dispersion of mixtures of submicrometer and nanometre sized titanias to obtain porous bodies

作者：Vicent M; Sanchez E; Molina T; Nieto M I; Moreno R^*

来源：Ceramics International, 2013, 39(8): 9091-9097.

DOI：10.1016/j.ceramint.2013.05.005

• Slip casting
• Suspensions
• TiO2
• Rheology
• Porous ceramics

The stability and theological behaviour of bimodal titania suspensions was studied. Bimodal mixtures were prepared by mixing nanosized TiO2 powders with an average primary size of similar to 20-40 nm and surface area of similar to 50 m(2) g(-1) and/or a colloidal titania suspension of the same nanopowders dispersed in water with a submicrometer sized titania. The dispersing conditions were studied as a function of pH, type and content of dispersant, and sonication time for a constant solids content of 30 vol% (62 wt%). The mixtures were slip cast and presintered at low temperatures (800-1000 degrees C) in order to obtain porous materials with anatase as the major phase. The pore size distribution, microstructure and phase composition were characterised using MEP, SEM and XRD techniques, respectively.

• 出版日期2013-12