Effect of Crystallization on Thermal Properties of (1−x)CaAl₂Si₂O₈-xCaMgSi₂O₆

Abstract

Dependence of thermal properties on the crystallization behaviors of (1−x)CaAl₂Si₂O₈-xCaMgSi₂O₆ glass-ceramics was investigated as a function of CaMgSi₂O₆ content (x). Crystallization behaviors of the specimens were depended on the CaMgSi₂O₆ content (x) which could be evaluated by the degree of crystallization obtained from the difference of peak temperature of crystallization (T_p ) from onset temperature of crystallization (T_c ), area of T_p of DTA curve and Challa-Hermans-Weidinger equation. The thermal diffusivity of the specimens was increased with the CaMgSi₂O₆ content (x), while the thermal conductivity was decreased up to x = 0.3, and then increased.

Keywords:

• Glass-ceramics
• Crystallization
• Diopside
• Anorthite
• Thermal conductivity

Acknowledgments

This work is the outcome of a Manpower Development Program for Energy & Resources supported by the Ministry of Knowledge and Economy (MKE).