稀土掺杂硅基气凝胶及其复合材料的制备与性能研究  

Preparation and properties of rare earth doped silicon-based aerogels and composites

作　　者：杨斌 孙良友 阳立芬 高庆福 李慕一 YANG Bin;SUN Liangyou;YANG Lifen;GAO Qingfu;LI Muyi(Hunan Ronglan Intelligent Technology Co.,Ltd.,Xiangtan 411100,China;Naval Representative Section Stationed in Xiangtan Area,Xiangtan 411100,China)

机构地区：[1]湖南荣岚智能科技有限公司,湘潭411100 [2]海装驻湘潭地区军事代表室,湘潭411100

出　　处：《复合材料科学与工程》2024年第10期40-44,64,共6页Composites Science and Engineering

基　　金：湖南省创新型省份建设专项高新技术产业科技创新引领计划(2022GK4050)。

摘　　要：为获得具有耐γ辐照性能的气凝胶保温材料,本文开发了一种以硅溶胶和硝酸钆、硝酸镧为原料,在酸碱催化作用下发生水解缩聚反应制备的稀土基气凝胶材料,将该材料与玻璃纤维进行复合,得到稀土基气凝胶复合材料。结果表明:稀土基气凝胶具有纳米多孔材料的典型特征,经900℃热处理后,钆基气凝胶收缩率和比表面积变化远小于二氧化硅气凝胶变化;对钆基气凝胶复合材料进行辐照处理,其力学性能未减小,说明该材料兼具耐辐照和保温性,可为核反应堆的安全、高效运行提供重要的保障。In order to obtain aerogel insulation materials with resistance toγradiation,a rare earth-based aerogel composite material was developed in this paper obtained by hydrolysis and polycondensation.Silica sol,gadolinium nitrate and lanthanum nitrate were used to obtain a rare earth-based aerogel composite material with glass fiber.The results show that rare earth-based aerogels have typical characteristics of nanoporous materials.After heat treatment at 900℃,both the shrinkage rate and the specific surface area of gadolinium-based aerogels are much smaller than that of SiO2 aerogels,besides,there is no difference of the mechanical properties of gadolinium-based aerogel composite materials after irradiation treatment,which indicates that the materials has both radiation resistance and thermal insulation properties,providing an important guarantee for the safe and efficient operation of nuclear reactors.

关 键 词：稀土基 复合气凝胶 耐辐射 隔热 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]