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利用CRT屏玻璃制备板状泡沫玻璃

Keywords: 板状泡沫玻璃,CRT屏玻璃,结构,制备工艺

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Abstract:

以废旧阴极射线管(CRT屏)为主要原料,混合碳粉作为发泡剂,硼砂为助熔剂、稳泡剂,利用烧结法制备出的板状泡沫玻璃是一种高性能无机建筑保温材料。利用TG-DSC-MS研究分析了CRT屏玻璃的热性能与发泡剂协同作用的关系。配合料被预先压制成板块状,然后在发泡温度下进行烧成。研究了发泡剂碳粉的含量、发泡温度和发泡时间与其结构、性能的关系。研究分析表明,以废CRT屏玻璃为主要原料、碳粉为发泡剂,将混合料压制成块,烧制出板状泡沫玻璃。其较佳的发泡温度为850℃、碳粉的最佳用量范围为0.3%~0.5%,较好的发泡时间为30min。烧制的板状泡沫玻璃的密度为0.292g/cm3。在相同的制备条件下,随着发泡温度的升高,气泡孔径也呈现增大趋势,孔壁也逐渐变薄。随着发泡时间逐渐增加,气孔的直径迅速增大,并有形成连通孔。

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