Abstract
Stable sodium zirconium phosphate (NZP)-iron phosphate glass-ceramics for nuclear waste immobilization were synthesized by a melt-quenching process and the effect of B2O3 on their phases, structure and properties were investigated in detail. The results show that the NZP-iron phosphate glass-ceramics with good thermal stability and chemical durability are obtained by the melt-quenching process. It is found that B2O3 addition is the key point to achieve the glass-ceramics with NZP as crystalline phase and the reasons on the formation of NZP phase due to B2O3 addition were also analyzed and explained. The obtained conclusions indicate that the iron phosphate based glass-ceramics containing NZP phase are potential matrix for immobilizing specific nuclear waste and suggest that melt-quenching process is a possibly applicable technology to prepare certain glass-ceramics containing nuclear waste.
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