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J. Korean Ceram. Soc. > Volume 11(4); 1974 > Article
Journal of the Korean Ceramic Society 1974;11(4): 19.
Xonotlite의 가열변화 -규산칼슘 수화물의 가열성상에 관한 연구 (I)-
이종근, 한상목
한양대학교 요업공학과
The Thermal Transformation of Xonotlite -Studies on the Thermal Transformation of Calcium Silicate Hydrates (I)-
The study was investigated to confirm the morphology of crystal from xonotlite to wollastonite at elevated temperature by electron microscopy. Mixtures of slaked lime and powdered quartz with plenty water were oscillated continuously in an autoclave under the pressure of 25kg/$textrm{cm}^2$ for 8 hours to obtain well crystallized xonotlite. This milky slurry consisting of xonotlite was gained and dried in oven at 11$0^{circ}C$. Examination of the electron micrograhs showed the xonotlite to be developed thin lath-like crystals and to be formed aggregate as chestnut bur. Details of the morphology suggest that the heat-treated xonotlite up to 100$0^{circ}C$ splited and deformed slightly in agreement with the topotaxial transformation theory of xonotlite to wollastonite. The molded material endured in good shape under 120$0^{circ}C$ except a little shrinkage.
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