一种废玻璃和废陶瓷再生的新建筑保温材料性能测试及应用

Performance test and application of new building insulation material for waste glass and waste ceramic recycling

以废玻璃和废陶瓷为基材,氯化钠为相变材料制备了一种新型再生相变蓄热材料。试验对再生相变蓄热材料的配比和制备条件进行优化,并对蓄热材料的蓄热性能和热循环性能进行表征。试验结果表明,基体材料与相变材料质量比为6∶4,烧结温度为950℃,烧结时间为60 min,制备的再生相变蓄热材料性能最佳。此时再生相变蓄热材料体积密度约为1.88 g/cm3,抗折强度约为40 MPa,峰值温度为797.7℃,相变潜热为60.52 J/g,蓄热密度为230.213 J/g,导热系数为0.73 W/(m·K),蓄热性能表现良好,满足GB 50411—2019标准要求。经过多次循环后,再生相变蓄热材料整体失重率始终低于1%,表现出良好的热循环性能。

A new type of regenerative phase change heat storage material was prepared using waste glass and waste ceramics as substrates and sodium chloride as phase change material.The experiment optimized the ratio and prepaȢration conditions of regenerated phase change thermal storage materials,and then characterized the thermal storage performance and thermal cycling performance of the thermal storage materials.The experimental results showed that the mass ratio of the matrix material to the phase change material was 6∶4,the sintering temperature was 950Ȩ,and the sintering time was 60 minutes.The regenerated phase change heat storage material prepared had the best performance.At this time,the volume density of the regenerated phase change heat storage material was about 1.88 g/cm3,the flexural strength was about 40 MPa,the peak temperature was 797.7Ȩ,the phase change laȢtent heat was 60.52 J/g,the heat storage density was 230.213 J/g,and the thermal conductivity coefficient was 0.73 W(/m·K).The heat storage performance was good,meeting the requirements of GB 50411—2019 standard.After multiple cycles,the overall weight loss rate of the regenerated phase change thermal storage material reȢmained below 1%,demonstrating good thermal cycling performance.