Financial support for MS from the Swiss National Science Foundation under grant no. 200021-122288/1.
Colloidal Processing and Yield Stress Modeling Towards Dry Pressed Green Bodies for Transparent Polycrystalline Alumina
Article first published online: 2 APR 2014
© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Engineering Materials
Special Issue: Advanced Ceramics and Coating Processing
Volume 16, Issue 6, pages 774–784, June 2014
How to Cite
Stuer, M. and Bowen, P. (2014), Colloidal Processing and Yield Stress Modeling Towards Dry Pressed Green Bodies for Transparent Polycrystalline Alumina. Adv. Eng. Mater., 16: 774–784. doi: 10.1002/adem.201400099
- Issue published online: 11 JUN 2014
- Article first published online: 2 APR 2014
- Manuscript Accepted: 3 MAR 2014
- Manuscript Received: 28 FEB 2014
- Swiss National Science Foundation. Grant Number: 200021-122288/1
Colloidal processing is a key aspect in modern ceramic processing but most formulations are found empirically. The need for a better knowledge based design of suspension formulation can be achieved by using interparticle potential modelling linked to rheological models. Here we look at the details behind slurry formulation for freeze granulation of doped alumina powders for use in the production of transparent polycrystalline alumina. The degree of complexation of the dopant ions with the dispersant, polyacrylic acid, has been investigated and shows the effect of both lowering the ionic strength and modifying the adsorption conformation. These insights into the subtleties of colloidal processing are discussed to provide a better basis for future formulation development.