模拟高放废物玻璃固化体的析晶行为研究  

STUDY ON THE DEVITRIFICATION BEHAVIOUR OF SIMULATED HLW-GLASS FORMS

作　　者：罗上庚[1] 姜耀中[1] 柳得橹[2] 

机构地区：[1]中国原子能科学研究院 [2]北京科技大学

出　　处：《核科学与工程》1990年第2期154-159,8,共6页Nuclear Science and Engineering

摘　　要：模拟高放废物玻璃固化体佯品在400—900℃经受不同时间热处理后。DTA、XRD和SEM-EDX分析表明,在500—775℃范围热处理形成三类晶体,玻璃基体上未见明显的裂纹。最大结晶速率的温度范围是600—750℃。主要析晶是一种富铀、钛、钙的晶体。给出了晶体体积百分数和晶体形貌,分析表明。析晶对本玻璃固化体的浸出性能和密度没有明显的影响,After the heat treatment of simulated HLW-glass specimens for different durations at 400--900℃,DTA,XRD and SEM—EDX analyses indicated that three kinds of crystals have been formed in the temperature range of 500—775℃,No visual crack is present in the glass matrix. The temperature range of rapid crystallization is between 600℃and 750℃. The major crystals are rich in U, Ti and Ca. The crystalline distribution fraction and morphology aregiven. Results of the analyses show that the devitrification has no great effect on the leachability and density of HLW glass forms.

关 键 词：高放射性 废物 玻璃固化体 析晶 

分 类 号：TL941.113[核科学技术—辐射防护及环境保护]