| Summary: | 碩士 === 國立臺北科技大學 === 材料科學與工程研究所 === 95 === The building energy depletion is the high percentage in the energy depletion of the whole world. Thermal insulation materials are important subject to save energy, and enhance the building function. This research work was using sodium silicate solution as raw materials, sodium aluminate and potassium hydroxide solution with different molar ratio of SiO2/Al2O3 were than added and the geopolymer gel was formed. The gel was heated during 100 – 400 ℃, thus porous and super light-weight thermal insulation materials were obtained. The gel would not foam until temperature reached 300℃. With increasing the molar ratio of SiO2/Al2O3, the density and compressive strength were decreased. When molar ratio of SiO2/Al2O3 was 20, a insulation material with 0.057 W/mK thermal conductivity can be obtained.
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