| Thermal Properties of 0.9CaMgSi2O6-0.1MgSiO3 Glass-Ceramics |
| Chang-Jun Jeon, Gui-Nam Sun, Jong-Kyu Lee, Han-Sae Ju, Eung Soo Kim |
| Department of Materials Engineering, Kyonggi University |
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| ABSTRACT |
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Dependencies of thermal properties on the crystallization behavior of $0.9CaMgSi_2O_6-0.1MgSiO_3$ glass-ceramics were investigated as a function of heat-treatment temperature from $750^{circ}C$ to $950^{circ}C$. The crystallization behavior of the specimens depended on the heat-treatment temperature, which could be evaluated by differential thermal analysis (DTA), Fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD) analysis by the Rietveld-reference intensity ratio (RIR) combined procedure. With an increase of the heat-treatment temperature, the thermal conductivity and thermal diffusivity of the heat-treated specimens increased. These results could be attributed to the increase of crystallization with heat-treatment temperature. However, the specific heat capacity of the heat-treated specimens was not affected by the heat-treatment temperature. The thermal conductivities measured from $25^{circ}C$ to $100^{circ}C$ were also discussed for application to lighting-emitting diode (LED) packages and substrate materials. |
| Key words:
Thermal properties, Glass-ceramics, Crystallization, Heat-treatment temperature |
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