纳米节能材料成型压缩变化及其绝热试验  

Compression of Nano Silica Energy Saving Material During Compacting Procedure and its Thermal Insulation Testing

作　　者：周致中 尤仁兴 姬军[2] 陈德平[2] 

机构地区：[1]无锡市明江保温材料有限公司,江苏无锡214199 [2]北京科技大学土木与环境工程学院,北京100083

出　　处：《中国材料科技与设备》2012年第6期49-51,共3页Chinese Materials Science Technology & Equipment

基　　金：江苏省无锡市科技计划项目（无锡市明江保温材料有限公司院士工作站,CYE01003）.

摘　　要：以纳米SiO2粉末与高折射率矿物粉末、增强纤维及高温收缩抑制剂，经千法混合后压制成型，制备较大体积密度的纳米节能材料。通过压制试验，研究了原料混合粉末在模具内的体积变化，探讨了物料中的气体对体积收缩率的影响，得到了材料体积密度与成型压力的关系。通过背温试验，将体积密度450kg／m3的纳米节能材料与现有市场上的复合反射绝热材料的绝热效果进行对比。结果表明，对于同样20mm厚度的两种材料，纳米节能材料热面温度稳定在668℃时，其冷面温度只有140℃。而复合反射材料热面温度稳定在641℃时，冷面温度高达229℃。纳米节能材料的绝热效果明显优于复合反射材料。Nano silica energy saving material （NSESM） with higher bulk density was obtained by compacting powder mix- tures, which were come from dry mixing of nano silica, mineral powder with high refractive index, reinforcing fiber and ther- mal shrinkage controlling agent. The volume of the raw material powder mixtures during compacting in mould was checked, the effect of gas on the volume shrinkage of mixtures was discusse＆ The bulk density of NSESM shows a function of compac- ting pressure. By back temperature testing, the thermal insulation effect of NSESM was compared with commercial composite reflex material （CCRM）. The cool face temperature of NSESM sample with thickness of 20mm is only 140℃ while its hot face temperature stabilizing at 668℃ during testing. However, as for CCRM sample, the cool face temperature reaches 229℃ with hot face temperature at 641℃. It shows that NSESM has superior thermal insulation effect than CCRM obviously.

关 键 词：纳米SIO2 节能材料 复合反射材料 背温试验 

分 类 号：TB321[一般工业技术—材料科学与工程] TU55[建筑科学—建筑技术科学]