Abstract
A foaming process for waste LCD glass is presented, in which waste LCD glass is recycled to produce alumino-borosilicate foamed glass, which can eventually be used as a heat-insulating material, a light-weight aggregate for civil engineering applications, or a carrier for sewage treatment. The effects on waste LCD glass foaming of a variety of carbon foaming agents, metal salt foaming agents, and bonding agents are examined, as well as other factors such as chemical composition, foaming temperature, and grain size of the raw materials from the waste LCD glass. After examining all the variables that influence the foaming process, it was confirmed that the waste LCD glass is suitable as a raw material for producing alumino-borosilicate foamed glass. The alumino-borosilicate foamed glass has excellent physical properties, with density less than 0.14g/cm3, heat conductivity less than 0.054W/(mK) @20°C, bending strength more than 35N/cm2, compressive strength more than 39N/cm2 and a coefficient of linear thermal expansion less than 4.5×10−6m/m°C. This clearly shows that the lightweight alumino-borosilicate foamed glass could be useful for various applications.
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