摘要
本工作研究了一种利用空心微球制备超轻泡沫玻璃的新方法,以废玻璃粉为主要原材料制备高气孔率的空心微球,研究了空心微球的发泡过程和发泡机理,利用空心微球发泡法制备出了超轻质泡沫玻璃。结果表明:空心微球气孔率高,发泡过程可控,可以制备气孔尺寸均匀、高气孔率的泡沫玻璃。随着玻璃粉粒径的减小,空心微球的体积膨胀率逐渐增加,当玻璃粉D50为4.3μm时,空心微球的最大体积膨胀率约为280%。随着烧结温度的升高,泡沫玻璃的容重降低,气孔率增加,泡沫玻璃中析晶增多,主要晶相包括SiO2(石英)、SiO2(鳞石英)和Na_(2)Ca_(3)Si_(6)O_(16)(失透石)。当烧结温度为725~800℃时,可以制备气孔率大于95%的超轻泡沫玻璃。本工作提出的空心微球发泡法对制备无机多孔材料具有较为广泛的适用性。
A new preparation method of ultralight glass foams from hollow microspheres was investigated in this work.High-porosity hollow microspheres were prepared using waste glass powder as the main raw material,and the foaming process and foaming mechanism of the hollow microspheres were investigated.The ultralight glass foams were successfully prepared by the hollow microspheres foaming method.The results show that the hollow microspheres with high porosity and controllable foaming process can be used to prepare glass foams with uniform pore size and high porosity.With the decreasing of the glass powder particle size,the volume expansion ratio of the hollow microspheres gradually increases.The maximum volume expansion ratio of the hollow microspheres is about 280%when the D 50 of the glass powder is 4.3μm.With the increasing of the sintering temperature,the bulk density of the glass foams decrease,the porosity and the crystal percentage of the glass foams increase.The main crystalline phases are quartz(SiO_(2)),tridymite(SiO_(2))and devitrite(Na_(2)Ca_(3)Si_(6)O_(16)).The ultralight glass foams with porosity greater than 95%are prepared at the sintering temperature of 725~800℃.The hollow microspheres foaming method presented in this work is widely applicable to the preparation of inorganic porous materials.
作者
渠亚男
谢永江
仲新华
杨金龙
QU Yanan;XIE Yongjiang;ZHONG Xinhua;YANG Jinlong(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;State Key Laboratory of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2024年第4期115-119,共5页
Materials Reports
基金
国家自然科学基金(51908551)。
关键词
空心微球
超轻泡沫玻璃
发泡过程
发泡机理
高气孔率
hollow microspheres
ultralight glass foam
foaming process
foaming mechanism
high porosity
作者简介
通信作者:渠亚男,2016年6月毕业于清华大学,获得博士学位。现为中国铁道科学研究院集团有限公司副研究员,主要研究领域为建筑材料。已发表学术论文30余篇,获10余项发明专利授权。quyanan2016@163.com。
