| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Manufacturing and Processing of Advanced Ceramic Materials
|
| Presentation Title |
Surface Area Reduction Behavior of Various Forming Methods of Alumina |
| Author(s) |
Daniel J. Delia, William M Carty, Hyojin Lee |
| On-Site Speaker (Planned) |
Daniel J. Delia |
| Abstract Scope |
The driving force for sintering and densification is the exchange of solid-vapor surface energy for solid-solid surface energy. The solid-vapor surface energy then correlates the measurable surface area obtained via nitrogen adsorption measurements (i.e., B.E.T. theory). To evaluate the role of processing on surface area reduction, and then potentially on the sinterability of ceramic compacts, compacts were prepared through several forming methods including loose powder (tapped bed) and through the slip casting of flocculated and dispersed suspensions of several commercial alumina powders. Specific surface area (SSA) was measured after heat treatments over a range of temperatures. The results indicate that the SSA reduction trajectory is independent of forming method. In addition, compacts were prepared from blends of fine and coarse powders, and from this data, a threshold temperature at which surface area reduction is observed, was deduced. |