| About this Abstract |
| Meeting |
Materials Science & Technology 2012
|
| Symposium
|
Solution-Based Processing for Ceramic Materials
|
| Presentation Title |
Role of Particle/Water Interaction on the Viscosity of Nano Alumina Powder Suspensions |
| Author(s) |
Simge Cinar, Mufit Akinc |
| On-Site Speaker (Planned) |
Simge Cinar |
| Abstract Scope |
The control over the viscosity of ceramic suspensions is critical for evolution of the cast and the microstructure. In order to understand the factors affecting the viscosity aqueous alumina nanopowder suspensions are studied by rheometry and low temperature DSC (LT-DSC) as a function of solids content and processing additives. LT-DSC of suspensions shows two or more water melting events. Lower melting event represents with “bound” water that is strongly coupled with the solid particle surface. The LT-DSC results are correlated with rheological behavior of the suspensions. Nano powders with high surface area reduce the fraction of “available” water which is reflected in high viscosity for these suspensions. Reduction in shear thinning with additives is correlated with cluster formation/breaking of the nano particle assemblies.This study is in part funded by NSF, CBET Particulate and Multiphase Processes, Grant # CBET-0931038 |
| Proceedings Inclusion? |
Undecided |