| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
2024 Graduate Student Poster Contest
|
| Presentation Title |
SPG-22: Elucidation of Internal Structural Change of Alumina Slurry with Temperature Increase by OCT Equipped with a Rheometer |
| Author(s) |
Miu Nakamura, Junichi Tatami, Motoyuki Iijima |
| On-Site Speaker (Planned) |
Miu Nakamura |
| Abstract Scope |
Although the internal structure of slurries is generally evaluated through rheological properties, this does not always provide correct results. Direct observation of the internal structure, performed simultaneously with rheological properties, is an effective solution to this problem. In this study, in-situ observation of the internal structure and rheological characterization of alumina slurries as the temperature increase were carried out simultaneously using optical coherence tomography (OCT) equipped with a rheometer. OCT images showed that the temperature increase resulted in inactive particle motion, meaning that the slurry flocculated. The storage modulus increased with this internal structural change. This transition temperature increased with as the amount of dispersant added, which dominates the dispersibility of the particles, increased, but the tendency was founded to be consistent. The change in the adsorption state of the dispersant on the particles with increasing temperature is considered to have caused the slurry to agglomerate. |