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以Nd2O3,ZrO2和SiO2为基本原料,设计不同固溶量的锆石基三价锕系核素固化体配方,采用高温固相法成功制备Zr1-xNdxSiO4-x/2(0≤x≤1)系列固化体。采用XRD及SEM对系列固化体进行表征,研究三价模拟锕系核素固溶量对固化体物相及结构的影响。结果表明:锆石晶格中的Zr位可以完全被Nd3+替代,当Nd3+的摩尔固溶量小于4%时,固化体保持为单一的锆石相结构,当Nd3+的摩尔固溶量大于或等于4%时,固化体中出现Nd2Si2O7结构物相,并随Nd3+的固溶量进一步增加,Nd2Si2O7结构物相逐渐增多;Nd2Si2O7相为片状形貌,随Nd3+的固溶量增加,固化体的密度随之增大。
Zr3-xNdxSiO4-x / 2 (0≤x≤1) was successfully prepared by high-temperature solid-state reaction using Nd2O3, ZrO2 and SiO2 as raw materials. Series curing body. XRD and SEM were used to characterize the series of solidified bodies to study the effects of the amount of solid solution of actinides on the phase and structure of the solidified bodies. The results show that Zr can be completely replaced by Nd3 +. When the molar amount of Nd3 + is less than 4%, the solidified body remains as a single zircon phase. When the molar amount of Nd3 + is greater than or equal to 4%, the Nd2Si2O7 phase appears in the solidified body and increases with the amount of Nd3 + solid solution. The structure of Nd2Si2O7 phase increases gradually. Nd2Si2O7 phase is flaky morphology. With the increase of Nd3 + Then increase.