Glass–Ceramic Foams from Borosilicate Glass Waste
Glass–Ceramic Foams from Borosilicate Glass Waste
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DOI：
10.1111/ijag.12069
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发表时间：
2014-06
影响因子：
2.1
通讯作者：
R. Taurino;I. Lancellotti;L. Barbieri;C. Leonelli
中科院分区：
文献类型：
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作者：
R. Taurino;I. Lancellotti;L. Barbieri;C. Leonelli
本文以硼硅酸盐玻璃废料为原料，以有机粘结剂为发泡剂，采用烧结法制备了硅灰石和方石英微晶玻璃泡沫陶瓷。废玻璃来自于洗衣机的拆解，具有CaO含量高、低温烧结性好的特点。的硼硅酸盐玻璃废料的烧结结晶能力的温度的影响，其次与热分析，加热显微镜，和电子扫描显微镜（ESEM）的观察。此外，温度对结晶相的演变和密度变化的影响进行了监测与XRD和密度测量。软化在800°C下开始，结晶在845°C下完成，在900°C下完成，在850-900°C范围内线性膨胀为38-40%。硅灰石和方石英被确定为结晶相，在不同的比例依赖于温度。即使存在方石英晶体，在高ESEM放大倍数下也没有发现裂纹迹象。最终产品显示出约78-79%的总孔隙率和约0.5g/cm 3的表观密度，与用于隔热的常见多孔闭孔玻璃泡沫一致。
In this study, we reported the studies on a glass–ceramic foam with wollastonite and cristobalite micrometric crystals prepared by sintering a borosilicate glass waste with organic binder as foaming agent. The waste glass, coming from the dismantling of washing machine, was characterized by high CaO content and low-temperature sinterability. The effect of the temperature on the sinter-crystallization ability of the borosilicate glass waste was followed with thermal analysis, heating microscopy, and electron scanning microscopy (ESEM) observations. Additionally, the effect of temperature on the evolution of crystalline phases and density variation was monitored with XRD and density measurements. The softening started at 800°C and crystallization at 845°C to be completed at 900°C with a linear expansion of 38–40% in the range 850–900°C. Wollastonite and cristobalite were identified as crystalline phases in variable proportions dependently upon temperature. No crack evidence was found at high ESEM magnification even though cristobalite crystals were present. The final products showed a total porosity around 78–79% and an apparent density of about 0.5 g/cm 3 , in line with common porous closed-cell glass foams used for thermal insulation.