Recycling of bottom ash containing expansive components as thermal interface materials
발표자
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초록
내용
As a result of the addition of quicklime in the desulfurization process of thermal power plants, a significant amount of calcium oxide (CaO) is incorporated into the bottom ash. CaO reacts with water, causing rapid expansion and resulting in pop-out issues when used as a concrete material, thus hindering its recycling. However, this increased CaO content enhances the thermal conductivity of bottom ash, suggesting its potential for thermal interface materials (TIMs). In this study, TIMs were fabricated using polypropylene, which has electrical insulating properties, as the matrix and bottom ash as the filler. To optimize thermal conductivity, the segregated structure was introduced, resulting in TIMs with thermal conductivity reaching up to 3.46 W/m·K. These bottom ash-based composites are expected to increase the recycling rate of bottom ash and contribute to the development of cost-effective TIMs.