碳酸钠对粉煤灰泡沫玻璃性能影响的研究  

Study on Effects of Sodium Carbonate on the Properties of Fly Ash Cellular Glass

作　　者：申鹏飞[1] 秦子鹏[1] 田艳[1] 李刚[1] 宋强[1] 周国奇 

机构地区：[1]石河子大学水利建筑工程学院,石河子832000

出　　处：《中国陶瓷》2017年第6期46-50,共5页China Ceramics

基　　金：国家自然科学基金(51468056);石河子大学第十四期大学生研究训练计划项目(SRP2016110)

摘　　要：发泡剂对泡沫玻璃物理力学性能有显著的影响。为了探究碳酸钠掺量对泡沫玻璃性能的影响及成孔机理,以20%粉煤灰和80%玻璃粉为基料,分别采用2%、3%、4%、5%和6%碳酸钠掺量,制备粉煤灰泡沫玻璃,并进行了测定;通过试验研究了碳酸钠掺量对粉煤灰泡沫玻璃的导热系数、表观密度、机械强度及孔隙率等性能指标的影响,并对碳酸钠在泡沫玻璃中的成孔机理进行了分析。当碳酸钠的掺量为5%时,导热系数为0.0735 W/(m·K),达到最小,抗压强度为1.58 MPa,抗折强度为0.75 MPa,表观密度为0.276 g/cm^3,孔隙率为87.7%,此时粉煤灰泡沫玻璃的空隙结构分布相对均匀且以封闭孔为主。泡沫玻璃孔径的大小与碳酸钠的粒径、发泡温度及压强等因素有关。当碳酸钠的粒径一定时,随着气泡内压强的增大,气泡直径减小;当泡内气体的压强一定时,气孔直径随着碳酸钠粒径的增大而增大。The foaming agent of cellular glass has a significant impact on its physical performance. In order to study the effect of dosage of sodium carbonate on tile properties of cellular glass and investigate the pore forming mechanism, using 20% fly ash and 80% glass powder as the raw materials, the dosage of sodium carbonate are respectively set at 2%, 3%, 4%, 5% and 6%, the the fly ash cellular glass was prepared and detected. The influence of dosage of sodium carbonate in fly ash cellular glass on the performance index in apparent density, mechanical strength, thermal conductivity and porosity was studied and the pore forming mechanism of cellular glass was analyzed. When the dosage of sodium carbonate is 5%, coefficient of thermal conductivity is 0.0735 W/（m·K）, compressive strength is 1.58 MPa, apparent density is 0.276 g/cm^3, porosity is 87.7%, the fly ash cellular glass structure distribution is relatively uniform and mainly closed pores. The aperture size of cellular glass has relationship with particle size of sodium carbonate, foaming temperature, pressure as well as other factors. When particle size of sodium carbonate is consistent, with the increase of the pressure inside a bubble, its diameter decreased; when the pressure of the gas is consistent, pore diameter is increasing with the diameter of sodium carbonate.conductivity and porosity was studied and the pore forming mechanism of cellular glass was analyzed. When the dosage of sodium carbonate is 5%, coefficient of thermal conductivity is 0.0735 W/ （m, K） , compressive strength is 1.58 MPa, apparent densiW is 0.276 g/cm^3, porosity is 87.7%, the fly ash cellular glass structure distribution is relatively uniform and mainly closed pores. The aperture size of cellular glass has relationship with particle size of sodium carbonate, foaming temperature, pressure as well as other factors. When particle size of sodium carbonate is consistent, with the increase of the pressure inside a bubble, its diameter decreased; when the pressure of the gas is c

关 键 词：碳酸钠 粉煤灰泡沫玻璃 物理性能 成孔机理 气孔直径 

分 类 号：TQ171.79[化学工程—玻璃工业]