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Preparation and Properties of Lead-Iron-Phosphate Nuclear Waste Glasses
Transactions of the Indian Ceramic Society ( IF 1.2 ) Pub Date : 2019-04-03 , DOI: 10.1080/0371750x.2019.1598281
Goutam Hazra 1 , Partha Mitra 2 , Tanmoy Das 3
Affiliation  

Abstract Lead-iron phosphate (LIP) glasses are a promising new waste form for safe immobilization of both high level defence and high level commercial radioactive waste for long term disposal. LIP glasses have several advantages such as lower aqueous corrosion rate, lower processing temperature, etc. The durability test for LIP glasses showed that the alkaline earth oxides BaO, SrO and CaO decrease the durability while PbO, Fe2O3 and CeO2 improves the corrosion resistance. For some LIP glass samples containing uranium the leach rates as calculated from BET surface areas were in the range of 8.2×10–4 to 4.3×10–3 g.m–2.h–1 at 90°C which is 1000 times lower than that of the borosilicate glasses. Thermal study shows that the glass transition temperature was in the range of 360°-400°C for the LIP glasses. IR studies show absorptions at 520, 1025, 1700, 2225 and 3450 cm–1. The observed IR and Raman scattering spectra are representative of a mixture of chain terminating Q1 species and chain forming Q2 species. From the radiotracer leaching studies the role of Ce4+ as good binder-modifier is established. The values of isomer shift in the Mössbauer spectra increases with increasing Fe2O3 content. GRAPHICAL ABSTRACT

中文翻译:

铅-铁-磷酸核废料玻璃的制备及性能

摘要 磷酸铁铅 (LIP) 玻璃是一种有前途的新型废物形式,可用于安全固定高水平国防和高水平商业放射性废物以进行长期处置。LIP 玻璃具有较低的水腐蚀速率、较低的加工温度等优点。LIP 玻璃的耐久性测试表明,碱土金属氧化物 BaO、SrO 和 CaO 降低了耐久性,而 PbO、Fe2O3 和 CeO2 提高了耐腐蚀性。对于一些含有铀的 LIP 玻璃样品,根据 BET 表面积计算的浸出率在 90°C 时在 8.2×10-4 到 4.3×10-3 gm-2.h-1 的范围内,比该值低 1000硼硅酸盐玻璃。热学研究表明,LIP 玻璃的玻璃化转变温度在 360°-400°C 的范围内。IR 研究显示在 520、1025、1700、2225 和 3450 cm–1。观察到的 IR 和拉曼散射光谱代表链终止 Q1 物质和链形成 Q2 物质的混合物。从放射性示踪剂浸出研究确定了 Ce4+ 作为良好的粘合剂改性剂的作用。穆斯堡尔谱中的异构体位移值随着 Fe2O3 含量的增加而增加。图形概要
更新日期:2019-04-03
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