基于粉煤灰的多孔无机保温材料的研制  

Preparation of Porous Thermal Insulation Material Using Fly Ash

作　　者：冯俊杰[1] 张瑞芳[1] 龚伦伦[1] 李晔[1] 程旭东[1] 

机构地区：[1]中国科学技术大学,火灾科学国家重点实验室,安徽合肥230027

出　　处：《材料科学与工程学报》2014年第5期638-642,共5页Journal of Materials Science and Engineering

基　　金：国家重点基础研究(973)资助项目(2012CB719701);国家科技攻关计划资助项目(2013BAJ01B05)

摘　　要：本文以工业废弃物粉煤灰为主要原料,在较低的成本下利用发泡注浆法制备了一种新型无机轻质多孔保温材料。为获得最佳材料组成配方和相关工艺参数,采用正交实验法L9(34)研究了固含量,原料配比,发泡剂用量和烧结温度对该保温材料性能的影响。研究结果表明:固含量对该保温材料的性能影响最大,烧结温度和发泡剂用量对其性能影响相对较小。在固含量为35wt%,粉煤灰掺加量为80wt%,废玻璃掺加量为15wt%,粘土掺加量为5wt%,发泡剂用量为0.3wt%,烧结温度为950℃时,可以制得抗压强度为0.63MPa,导热系数为0.0597W/(m·K),气孔率为91.1%的新型轻质多孔保温材料。论文结果对粉煤灰的回收利用和建筑物的外墙保温有重要参考意义。A new kind of thermal insulation material has been made using fly ash as main material by the method of foaming and slip casting.We investigated the effects of the solid loading,raw material ratio,additive amount of foaming agent and sintering temperature on the properties of porous thermal insulation material by orthogonal experiment in order to achieve the optimal technologic parameters.The results show that the solid loading has the greatest influence on this insulation material and the sintering temperature and additive amount of foaming agent have the relatively small effect.With solid loading of 35wt%and 80wt%of fly ash,15wt%of waste glass,5wt% of clay and 0.3wt% of foaming agent added,material with compressive strength of0.63 MPa and porosity of 91.1%could be prepared at the sintering temperature of 950℃,thermal conductivity of 0.0597W/（m.K）owned.This research has a great significance on the reutilization of fly ash and external wall insulation.

关 键 词：粉煤灰 正交设计 导热系数 保温材料 

分 类 号：TQ175[化学工程—硅酸盐工业]