| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
2024 Graduate Student Poster Contest
|
| Presentation Title |
SPG-24: In Situ Observation of Dewaxing Behavior of Alumina Green Body by a Combined OCT-TG-FTIR-MS System |
| Author(s) |
Fumiya Kimura, Junichi Tatami, Motoyuki Iijima, Takuma Takahashi |
| On-Site Speaker (Planned) |
Fumiya Kimura |
| Abstract Scope |
Exhaust gas, weight change, and internal structure during dewaxing process of alumina green bodies were directly and simultaneously observed by a combined OCT-TG-FTIR-MS system
TG showed that weight loss started at around 200 ℃, and MS and FTIR analysis of the exhaust gas revealed butyraldehyde and other compounds resulting from thermal decomposition of the side chains of PVB added as a binder. The OCT images at this time indicated a large deformation of the green body. After 400 ℃, CO2, CO and other gases produced by oxidative decomposition of the remaining PVB main chains were detected in the exhaust gas, but the OCT image was not changed. Considering that the side chains of PVB played a role in the adhesion between particles due to van der Waals attraction, their disappearance resulted in the softening and weakening of the green body, and thus the appearance of a large deformation. |