ScholarWorks@성균관대학교

초록

In this study, foamed glass was fabricated by adjusting the final heat treatment temperature. The heat treatment temperatures ranged from 900 degrees C to 1,100 degrees C at 50 degrees C intervals. Blast furnace slag (BFS) powder was mixed with foaming agent such as CaCO3, Ca-3(PO4)(2), Na2SiO3 and NaOH, pressed under compression, then heat treated to form a porous and stable glass structure. Their optical, thermal, and physical properties, including thermal coefficient, density, glass transition temperature (T-g) and X-ray diffraction patterns, were investigated. As the heat treatment temperature increased, the apparent density decreased from 1.44 g/cm(3) to 1.03 g/cm(3) while the porosity increased from 46.03 % to 58.89 %. Thermal coefficient decreased from 9.997 x 10(-6) /K to 9.417 x 10(-6) /K. The main XRD peak gradually shifted toward a lower angle, indicating an expansion of the glass network structure. Results showed that foamed glass based on BFS, developed with a porous structure, can be used as an effective thermal insulation material, suggesting the potential for the commercial utilization of slag.

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