γ辐照-热顺序老化对改性钠基膨润土微观结构的影响  

Influences of γ-rays irradiation-thermal sequential aging on the microstructure of modified sodium bentonite

作　　者：赵帅维[1] 杨仲田[1] 刘伟[1] 李洪辉[1] 安鸿翔[1] 刘建琴[1] 万蕾[1] 

机构地区：[1]中核高放废物地质处置评价技术重点实验室 中国辐射防护研究院,太原030006

出　　处：《辐射研究与辐射工艺学报》2013年第4期60-64,共5页Journal of Radiation Research and Radiation Processing

摘　　要：采用X射线衍射方法对经过γ辐照-热顺序老化的高庙子改性钠基膨润土微观结构变化进行了研究。结果显示:在本研究的实验条件范围内,不同累积剂量老化作用后样品的微观结构相近,不同温度老化作用相同时间后样品的微观结构也相近,表明累积剂量和老化温度对微观结构变化的影响较弱;再吸水试验表明,钠基膨润土衍射峰位置随热老化时间的变化主要是由蒙脱石所含结晶水层数随热老化时间的变化所引起,这种变化是可逆的。证明经过5000kGy-230℃-8760h老化后,高庙子改性钠基膨润土仍保持了吸水恢复能力。The microstructure changes of modified sodium bentonite from Gaomiaozi after gamma rays irradiation-thermal sequential aging were studied using X rays diffractometer. The results showed that the microstructure of modified sodium bentonite with different cumulative doses had little change under the experimental conditions in this study, and the same results were obtained in the case of modified sodium bentonite after aging the same time at different temperatures. The results also indicated that the cumulative dose and the aging temperature had no significant effects on the microstructure change of modified sodium bentonite. The water absorption experiment showed that the changes of the position of the diffraction peak of modified sodium bentonite with aging time were mostly dependent on the changes of the number of crystal water of montmorillonite with aging time. Furthermore, it was found that the changes were reversible. The modified sodium bentonite from Gaomiaozi could maintain its ability of water absorption unchangeable after 5 000 kGy 7-rays irradiation and thermal aging for 8760 h at 230~C.

关 键 词：γ辐照-热顺序老化 X射线衍射 改性钠基膨润土 

分 类 号：TL99[核科学技术—核技术及应用]