Preparation of glass ceramic foams for thermal insulation applications from coal fly ash and waste glass
Preparation of glass ceramic foams for thermal insulation applications from coal fly ash and waste glass
复制标题
利用粉煤灰和废玻璃制备隔热用泡沫玻璃陶瓷
DOI：
10.1016/j.conbuildmat.2016.02.183
复制
发表时间：
2016-06-01
影响因子：
7.4
通讯作者：
Zhang, Zuotai
中科院分区：
文献类型：
--
作者：
Zhu, Mengguang;Ji, Ru;Zhang, Zuotai
以粉煤灰和废玻璃为主要原料，硼砂和碳酸钙分别为助熔剂和发泡剂，采用直接发泡法制备泡沫玻璃陶瓷。系统研究了粉煤灰添加量、发泡时间、升温速率和烧结温度对容重、孔隙率、力学性能和导热系数的影响。采用 40 wt.% 粉煤灰、60 wt.% 废玻璃、30 wt.% 硼砂和 0.5 wt.% 碳酸钙在 800 摄氏度下制备 45 分钟，获得了制备泡沫玻璃陶瓷的最佳参数。以这种方式制备的样品具有低堆积密度（低至0.46 g/cm(3)），表现出相当大的抗压强度（超过5 MPa）和低导热率（约0.36（W/m K））。通过EnergyPlus软件对泡沫玻璃陶瓷的节能效果进行评价，表明所制备的泡沫玻璃陶瓷对于建筑保温材料表现出良好的节能效果。考虑到经济和环境方面的优势，利用固体废物制备泡沫玻璃陶瓷可能为制备隔热材料提供一种有前景的方法。 (c) 2016 Elsevier Ltd. 保留所有权利。
Glass ceramic foams were prepared by direct foaming method, using coal fly ash and waste glass as the main materials, borax and calcium carbonate as fluxing agent and foaming agent, respectively. The effects of coal fly ash additions, foaming time, heating rate and sintering temperature on the bulk density, porosity, mechanical properties and thermal conductivity were systematically investigated. The optimum parameters to prepare the glass ceramic foams were obtained at 800 degrees C for 45 min with 40 wt.% coal fly ash, 60 wt.% waste glass, 30 wt.% borax and 0.5 wt.% calcium carbonate. The specimens prepared this way have a low bulk density (as low as 0.46 g/cm(3)), exhibiting considerable compressive strength (exceeding 5 MPa) and low thermal conductivity (about 0.36 (W/m K)). The energy saving effect using glass ceramic foams was evaluated by EnergyPlus software, indicating that the prepared glass ceramic foams show good energy conservation effect for building thermal insulation materials. The preparation of glass ceramic foams using solid wastes may provide a promising way to prepare thermal insulation material, considering the advantages in both economic and environmental aspects. (c) 2016 Elsevier Ltd. All rights reserved.