以废玻璃为主要原料,CaCO3为发泡剂,H3 BO3为助熔剂,Na3 PO4?12H2 O 为稳泡剂,利用 CaCO3在高温熔融状态下分解产生CO2对熔体发泡制备泡沫玻璃.采用XRD、ESEM对制备所得的泡沫玻璃的物相和显微结构进行了表征和分析,研究了不同发泡温度对产品的气孔结构、表观密度、隔热性能及吸水率等的影响.结果表明,随着发泡温度的升高,泡沫玻璃气孔随之增大,到达一定温度后,随着温度升高,气体逸出,气孔收缩,而表观密度和抗折强度在同样温度变化下呈现下降的趋势.当发泡温度为810℃时,气孔大小适中且分布较均匀,综合性能相对良好,其表观密度为297．62 kg/m3,抗折强度为1．02 MPa,有最佳的隔热性能,体积吸水率为17．92％.
The foam glass was produced through the foaming process,using waste glass as the primary raw ma-terial,calcium carbonate which will break down into carbon dioxide in the molten state at high temperature as foaming agent,boric acid as fluxing agent,sodium phosphate as foam stabilizer.With the aid of XRD,ESEM and other instruments helping characterize and analyze the microstructure and phases,the influences of sinte-ring temperature on foam glass were examined including the pore structure,apparent density,thermal insula-tion,etc.The results demonstrated that the porosity of foam glass increased with the rising of temperature,and the gas escaped and the pores shrank when it reaching a certain temperature.The apparent density and flexural strength displayed the downward trend.The sample has relatively optimum properties especially in thermal in-sulation at 810 ℃ with evenly distributive moderate aperture whose apparent density was 297.62 kg/m3 ,flexur-al strength was 1.02 MPa,volumetric water absorption was 17.92%.
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