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用溶解速率法(dissolutionrate)、试样坚固法(productconsistencytest)和蒸汽水化侵蚀法(vaporhydrationtest)对高放射性核废料(HLW)玻璃固化体的化学稳定性作了全面的测试,并对它们进行傅立叶变换红外光谱(FTIR)和X射线衍射(XRD)测试.FTIR分析表明,在较高的HLW包容量的玻璃固化体中,含有较少的容易被水化(PO3)1-的长链单元,因此它们具有优良的化学稳定性.XRD分析表明,玻璃固化体中分离的(P2O7)4-和(PO4)3-阴离子团被金属离子Fe3+,Cr3+等所连接,形成O—Me—O—P键,不仅提高了玻璃的抗析晶的能力,而且也大大地提高了化学稳定性.这些高包容量的玻璃固化体的原子比O/(Si+P)为3.7～4.1,从结构上也印证了HLW包容量达70%和75%(质量分数)的玻璃固化体会具有卓越的化学稳定性.
The chemical stability of HLW glass hardened bodies was thoroughly tested by dissolution rate, productconsistency test and vapor hydration test, and their Fourier (FTIR) and X-ray diffraction (XRD) tests.FTIR analysis showed that the glass solidification body with high HLW volume contained less long-chain units easily hydrated (PO3) 1-, So they have excellent chemical stability.The XRD analysis shows that the (P2O7) 4- and (PO4) 3- anions separated in the glass solidification body are connected by the metal ions Fe3 + and Cr3 + to form O-Me-O-P Bond not only improves the ability of glass to resist crystallization but also greatly enhances the chemical stability.The atomic volume ratio O / (Si + P) of these high-volume glass solidified bodies is 3.7 to 4.1, It is demonstrated that glass cured bodies with an HLW volume of 70% and 75% (mass fraction) have excellent chemical stability.