摘要
研究了不同B2O3掺量对铁磷酸盐玻璃陶瓷高放废物固化体结构和性能的影响。应用溶出速率法(DR)对固化体进行了化学稳定性测试,使用傅里叶变换红外光谱(FTIR)和X射线衍射(XRD)方法研究了样品的结构。研究结果表明:玻璃陶瓷固化体的主晶相为独居石;B2O3的引入对玻璃陶瓷固化体的化学稳定性影响较大,以10%(摩尔分数)的B2O3代替Fe2O3制得的固化体化学稳定性最佳,其28d的质量浸出率约为7.81×10-9 g.cm-2.min-1;试样中存在大量正磷酸基团[PO4]3-和少量焦磷酸基团[P2O7]4-,无偏磷酸基团[PO3]-存在,固化体中的B主要以[BO4]四面体基团形式存在。
The effects of doping iron phosphate glass-ceramic wasteforms containing high level waste （HLW） with different B2O3 contents on their structures and properties were investigated. The chemical durability of glass-ceramic wasteforms was measured by dissolution rate （DR） method. The structure of the glass-ceramic wasteforms was analyzed by Fourier turning infrared （FTIR） and X-radiation diffraction （XRD）. The results show that glass-ceramic wasteforms have the main crystalline phase of monazite. There are great effects of wasteforms on the chemical durability. The 28 d leaching rate of glass-ceramic watesforms is 7.81 × 10^-9 g/（cm2·min） when 10% （mole percent） Fe2O3 is replaced by B2O3 in watesforms. Samples exist a large number of [PO4]^3- , a small amount of [P2O7]^4- and no [PO3]^-. Boron in wasteform samples is present as tetrahedral [BO4] units.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2011年第12期1421-1426,共6页
Atomic Energy Science and Technology
基金
国防基础科研计划资助项目(B3120110001)
四川省教育厅重大培育基金资助项目(09ZZ040)
四川省非金属复合与功能材料重点实验室开放基金资助项目(10zxfk02)
关键词
铁磷酸盐玻璃
玻璃陶瓷
高放废物
固化体
iron phosphate glass
glass-ceramic
high level waste
wasteform
