Articles
  • Preparation of glass ceramics from sludge bottom ash and waste glass
  • Soon-Do Yoona and Yeon-Hum Yunb,*
  • aDepartment of Applied Chemical Engineering, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju 500-757, South Korea bDepartment of Energy & Resources Engineering, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju 500- 757, South Korea
Abstract
Glass ceramics are prepared by milling and firing at various temperatures using sludge bottom ash from incinerators and waste glass as starting materials. The FE-SEM observations of glass ceramics indicated that with an increase of the firing temperature from 850 oC to 1050 oC, acicular type crystals were grown to about 11 μm in length. A specimen fired at 1050 oC showed the optimum formation of acicular type crystals as well as their best mechanical properties. Crystallinity, morphological properties and chemical compositions were examined using X-ray diffraction (XRD), field emission–scanning electron microscopy (FE-SEM) and an energy dispersive X-ray spectrometer (EDS). Various properties, such as density, compressive strength, bending strength and chemical durability were also examined.

Keywords: Glass ceramics, Sludge bottom ash, Waste glass, Milling

This Article

  • 2011; 12(4): 361-364

    Published on Aug 31, 2011

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