| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Journal of the American Ceramic Society Awards Symposium
|
| Presentation Title |
Effect of CaF<sub>2</sub>, B<sub>2</sub>O<sub>3</sub> and the CaO/SiO<sub>2</sub> Mass Ratio on the Viscosity and Structure of B<sub>2</sub>O<sub>3</sub>–Containing Calcium–silicate–based Melts |
| Author(s) |
Gihyun Kim, Il Sohn |
| On-Site Speaker (Planned) |
Il Sohn |
| Abstract Scope |
The relationship between the viscosity and structure of B<sub>2</sub>O<sub>3</sub>–containing calcium–silicate–based oxides and the effects of CaF<sub>2</sub>, CaO, and B<sub>2</sub>O<sub>3</sub> on the viscosity and their correlation with the structural aspects were studied using a rheometer with Fourier transformation infrared and Raman spectroscopy at below 1673K. The viscosity decreased with increasing CaF<sub>2</sub> addition up to 28wt% at a fixed CaO/SiO<sub>2</sub> ratio of 0.3 by depolymerization. At higher C/S ratios, the viscosity decreased in the presence of greater Ca<sup>2+</sup> and O<sup>2-</sup> supplied from CaO. With regard to the B<sub>2</sub>O<sub>3</sub>–melt, the structural polymerization was observed by comparing the B<sub>2</sub>O<sub>3</sub>–free to 4.4wt% B<sub>2</sub>O<sub>3</sub> content. However, the viscosity was relatively constant with increasing B<sub>2</sub>O<sub>3</sub> addition. However, the viscosity decreased due to greater simplification of the network structure above 4.4wt% B<sub>2</sub>O<sub>3</sub>. |