摘要
为研究膨润土的长期稳定性,以高庙子天然钙基膨润土及其改性钠基膨润土为研究对象,利用热重-差示扫描量热(TG-DSC)方法对不同累积剂量的电子辐照和不同温度、不同热作用时间下的老化样品进行了分析。结果表明:高温作用引起的膨润土吸热峰峰值温度和起始温度的变化比电子辐照的大;钠基土比钙基土有更好的耐电子辐照和高温老化能力。在电子辐照/高温老化条件下,改性高庙子钠基膨润土的结构热稳定性比其钙基膨润土好。
In order to study the long-term stability, natural Gaomiaozi（GMZ） Ca-bentonite and its modified Na-bentonite samples, which suffered different doses of electron beam irradiation or different temperatures and thermal aging time, were analyzed using thermogravimetry-differential scanning calorimetry（TG-DSC）. The results show that variations of the peak temperature and initial temperature induced by high temperature aging are larger than those induced by electron bean irradiation. GMZ Na-bentonite performs better in withstanding the electron bean irradiation and high temperature aging than that of the natural Ca-bentonite. The long-term thermal stability of Na-bentonite is better than that of Ca-bentonite under electron irradiation/high temperature aging.
出处
《辐射研究与辐射工艺学报》
CAS
CSCD
2014年第5期59-64,共6页
Journal of Radiation Research and Radiation Processing
基金
国防科工局"十二五"地质处置安全评价技术研究(科工二司[2013]1221号)资助
关键词
膨润土
热稳定性
电子辐照
高温老化
TG—DSC分析
Bentonite, Thermal stability, Electron bean irradiation, High temperature aging, TG-DSC analysis
