About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Engineering Ceramics: Microstructure-Property-Performance Relations and Applications
|
| Presentation Title |
Effect of SiO2 Content on High-Temperature Phase Transition and Physical Properties in Calcium Aluminate Cement |
| Author(s) |
Sangmin Hong, Jong-Won Kim, Ha-Jin Gu, Young-Jae Kim, Ah-Hyeon Park, Eun-Hee Kim, Yong-Hyuk Kim, Sang-Bae Choi, Sang-Chae Jeon |
| On-Site Speaker (Planned) |
Sangmin Hong |
| Abstract Scope |
Alumina-based refractory castables are widely used in the steel manufacturing process due to their high strength and excellent resistance to thermal shock. Calcium aluminate cement (CAC) is used as a binder for the castables, and SiO2 can added to enhance their workability. On the other hand, liquid phases, which can be harmful for the castable’s stability, are formed at high temperature when the SiO2 is added, and hence the SiO2 content needs to be optimized. In this study, the physical properties of CAC were examined with different content of SiO2, ranging from 0.26 to 4 wt.%, to determine the optimal range of the SiO2 content. As a result, compressive strength and shrinkage of the CAC samples increased with increase of the SiO2 content, and these changes were explained with microstructural variations. This study, therefore, provides an appropriate trade-off strategy required for industrial applications of the CAC in the future. |