摘要
采用二次自蔓延高温合成(SHS)技术制备钙钛矿固化高放废物90Sr,通过XRD,SEM和PCT粉末浸泡法,研究了钙钛矿固化体的微观组织、浸出率以及其对高放废物90Sr的最大包容量。结果表明,固化体样品密度高、孔隙率小,浸出率都小于0.1 g/(m2.d),对SrO的包容量可达36%(质量分数);表明自蔓延高温合成的钙钛矿人造岩石固化体化学稳定性好、包容量大,是固化高放废物的理想固化体。
Perovskite synroc samples containing high level radioactive waste （HLW） ^90Sr were synthesized by double self-propagating high-temperature synthesis （SHS） and their properties, including leach rate, density, microhardness and the maximum content of high level radioactive waste in the samples, were tested by X-ray diffraction, scanning electron microscope and PCT powder immersion analysis. The results indicate that the high density Sr^2＋-CaTiO3 composite are formed, and leaching rates are less than 0.1 g/（m^2·d）, and the maximum SrO content in the composite can reach 36 % in mass. It can be concluded that the perovskite synroc is a perfect material to immobilize HLW.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
2009年第4期237-241,共5页
Journal of Nuclear and Radiochemistry
基金
国家自然科学基金资助项目(20476008)
河南省高效科技创新人才支持计划(2008HASTIT015)
华北水利水电学院高层次人才启动基金(No.200820)
关键词
钙钛矿
高放废物(HLW)
固化
自蔓延高温合成
浸出率
perovskite
high level radioactive waste
immobilization
self-propagating high-temperatures synthesis
leaching rate
