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Journal of the Korean Ceramic Society 1980;17(1): 20. |
| Slag 위주의 $CaO-MgO-Al_2O_3-SiO_2(-Na_2O)$계 유리의 결정화 반응기구 |
| 장승현, 정형진 |
| 한국과학기술연구소 건축재료연구실 |
| Crystallization Mechanism of Slag-based Glass in $CaO-MgO-Al_2O_3-SiO_2(-Na_2O)$ System |
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| ABSTRACT |
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The crystallization behaviors of slag-based glass in $CaO-MgO-Al_2O_3-SiO_2(-Na_2O)$ system have been studied. The mother glass containing 16.50 CaO, 7.50MgO, 19.70Al2O3, 50.80SiO3 and 2.09wt% $Na_2O$ was prepared by using Korean domestic raw materials such as granulated slag, serpentine, sea sand and etc. The glass-ceramics composed of major crystalline phase diopside was produced by the heat treatment in a temperature range from 850$^{circ}$ to 9$25^{circ}C$ for 0-6hr. The composition and morphology of diopside phase formed in the system were examined by X-ray diffraction analysis and electron microscopy. The kinetic measurements such as J.M. A plot and Arrhenius plot indicated that the process of nucleation of the initially formed diopside phase could be described from the view point of instantaneous nucleation. It was also demonstrated that the linear crystal growth of diopside phase was proceeded by short range diffusion of $Mg^{2+}$ and $Ca^{2+}$ ion. The microstructures of the resulting glass-ceramics were consisted of leafroidal shaped crystalline aggregations. |
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