高强度泡沫玻璃的工艺及机械性能研究(英文)  

ELABORATION AND MECHANICAL BEHAVIOR OF HIGH STRENGTH FOAM GLASS

作　　者：郭宏伟[1] 龚煜轩[1] 刘新年[1] 李颖慧[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,陕西西安710021

出　　处：《陕西科技大学学报（自然科学版）》2010年第3期1-6,共6页Journal of Shaanxi University of Science & Technology

基　　金：陕西科技大学科研自选项目(ZX/09-19)

摘　　要：以废弃的阴极射线管玻璃为原料,SiC为发泡剂,采用粉末烧结法制备了高强度泡沫玻璃,通过DSC、XRD、SEM等分析手段研究了发泡剂的加入量及升温速率、降温速率、保温时间等对泡沫玻璃性能的影响.实验结果表明:泡沫玻璃的机械性能与发泡剂的加入量、升温速率、降温速率、保温时间等具有很大关系,当加入1～7wt%的发泡剂SiC,在840℃发泡保温后以1～2℃/min的冷却速率冷却时,试样的机械强度可达2～20MPa.试样中产生了Pb,Pb3O4和Al6Si2O13等晶体及试样本身的高密度是导致试样机械强度高的主要原因.The new high strength foam glass-ceramics were prepared by sintering method using waste cathode ray tube （CRT） as the raw material and SiC as foaming agent. The effect of foaming agent dosage, heating rate, cooling rate and holding time on mechanical properties of the sample were analyzed by differential scanning calorimeter （DSC）, X-ray diffraction （XRD）, and scanning electron microscopy （SEM）.The experimental results indicate that mechanical strength is strongly affected by dosage of foam agent, heating rate, cooling rate and holding time. Due to the precipitation of Pb, Pb3O4 and Al6Si2O13 and a dense porous structure, high mechanical strength values of 2～20 MPa could be obtained by adding 1～7 wt% SiC , a relatively low sintering temperature around 840 ℃ and a cooling rate of 1～2 ℃/min. Good correlations between mechanical strength, precipitation of micro-crystals and SiC dosage were observed.

关 键 词：泡沫玻璃 玻璃废弃物 强度 

分 类 号：TQ171.722[化学工程—玻璃工业]