晶粒生长对铁磷酸盐玻璃陶瓷固化体化学稳定性的影响  

Effect of the Growth of the Crystal on the Chemical Durability of Iron Phosphate Glass-Ceramic Waste Form

作　　者：向光华[1] 廖其龙[1] 牟涛[2] 万小刚[2] 

机构地区：[1]西南科技大学四川省非金属复合与功能材料重点实验室,四川绵阳621010 [2]表面物理与化学国家重点实验室,四川绵阳621907

出　　处：《西南科技大学学报》2012年第2期5-8,19,共5页Journal of Southwest University of Science and Technology

基　　金：国防基础科研计划资助(B3120110001);四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地开放基金资助(10zxfk02)

摘　　要：铁磷酸盐玻璃陶瓷可用于固化高放核废物。通过改变原料粉末尺寸和热处理的升温速率来控制成核的均匀性和晶核的生长速度,研究了在独居石玻璃陶瓷固化体中晶粒生长对固化体化学稳定性的影响。结果表明:粉末尺寸越小,越有利于形成均匀的晶核,固化体的化学稳定性越好,当粉末粒度小于38μm时浸出率达到最低值;热处理的升温速率越慢,所形成的微晶尺寸越均匀,固化体的化学稳定性越好,当升温速率为1℃/min时,样品的浸出率最低。This paper presented the crystallization study of iron phosphate glass-ceramic which is a simpli- fied version of a new unclear host to be a potential candidate for the immobilization of highly concentrated radioactive wastes. The impact of changing the heating rate or the size of the glass powders during the ex- periment on the growth of the crystallization had been studied. It is observed that the slower the heating rate is, the more balanced the crystal is, and the smaller the size is, the more balanced the crystal is. The growth of the crystal is more balanced with slowing down the heating rate and decreasing the size of glass powders. The leaching rate of the samples is lowest when the size of the glass powders is less than 38μm in diameter and the heating rate is 1℃/min.

关 键 词：玻璃陶瓷固化体 晶相 升温速率 浸出率 化学稳定性 

分 类 号：TQ174[化学工程—陶瓷工业] TL941[化学工程—硅酸盐工业]