论文部分内容阅读
在含高放核废料的玻璃固化体中添加了不同含量的Cr2O3,以考察其对玻璃固化体的结构和性质的影响.对添加Cr2O3的玻璃固化体进行了各种方法(溶出速率法,蒸汽水化侵蚀和试样坚固性法)的化学稳定性的测试.测试结果表明,Cr2O3的引入不会对玻璃固化体的化学稳定性产生不良的影响.与此相反,Cr2O3能抑制各种离子自玻璃固化体中沥析出来, 改善玻璃固化体的化学耐蚀性. XRD内标法测定,Cr2O3在铁磷酸盐玻璃中的溶解度可达4.1%,是其在硼硅酸盐玻璃的3倍. FTIR和DTA的结果表明,不同含量的Cr2O3的引入, 不会对玻璃固化体的网络结构造成显著的变化. Mossbauer谱表明,Fe2+/Fe3+的比值随着Cr2O3的含量的增加而增大,说明Cr离子和Fe离子在玻璃熔制过程中发生氧化还原反应, 形成的Cr+6有利于提高玻璃固化体的化学耐蚀性.
Different concentrations of Cr2O3 were added into the glass solidification body containing high-level nuclear waste to investigate the effect of Cr2O3 on the structure and properties of the glass solidification body. Various methods (dissolution rate method, steam Hydration erosion and sample robustness test) The test results show that the introduction of Cr2O3 does not have an adverse effect on the chemical stability of the glass cured body In contrast, Cr2O3 can inhibit a variety of ions from Glass solidified body leached out to improve the chemical corrosion resistance of glass solidified body.XRD internal standard method, Cr2O3 solubility in iron phosphate glass up to 4.1%, which is 3 times in the borosilicate glass. FTIR and DTA results show that the introduction of different content of Cr2O3 does not cause significant changes in the network structure of the glass cured body.The Mossbauer spectrum shows that the ratio of Fe2 + / Fe3 + increases with the increase of Cr2O3 content, indicating that Cr Ion and Fe ions in the glass melting process occurs redox reaction, the formation of Cr + 6 is conducive to improving the chemical resistance of the glass cured body.