【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。更多还原

【Abstract】 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 3-,a small amount of 4-and no-.Boron in wasteform samples is present as tetrahedral units.更多还原