CAJ | 학술논문

为研究锆英石对放射性核素 Pu （Ⅳ）的固化能力，选用Ce （Ⅳ）作为 Pu （Ⅳ）的模拟替代物质，以ZrO2、SiO2和CeO2粉体为原料，在1500℃条件下通过保温72 h进行ZrxCe1- xSiO4（0≤ x≤0.5）系列样品的制备。利用XRD对所获样品的物相和结构进行分析，并采用Rietveld结构精修方法对样品的晶胞参数进行精细化计算。结果表明：当0≤ x≤0.05时，样品保持为锆英石相；当 x＞0.05时，有CeO2物相出现。在锆英石相范围内，晶胞参数 a、c、V 与x之间符合线性关系。phase of cerium oxide is found when the value of x is more than 0.05．The parameters a ，c ，V and x in the system of ZrxCe1- xSiO4（0≤ x≤0.05） respectively follow the linear relations ．
위연구고영석대방사성핵소 Pu （Ⅳ）적고화능력，선용Ce （Ⅳ）작위 Pu （Ⅳ）적모의체대물질，이ZrO2、SiO2화CeO2분체위원료，재1500℃조건하통과보온72 h진행ZrxCe1- xSiO4（0≤ x≤0.5）계렬양품적제비。이용XRD대소획양품적물상화결구진행분석，병채용Rietveld결구정수방법대양품적정포삼수진행정세화계산。결과표명：당0≤ x≤0.05시，양품보지위고영석상；당 x＞0.05시，유CeO2물상출현。재고영석상범위내，정포삼수 a、c、V 여x지간부합선성관계。phase of cerium oxide is found when the value of x is more than 0.05．The parameters a ，c ，V and x in the system of ZrxCe1- xSiO4（0≤ x≤0.05） respectively follow the linear relations ．
In order to investigate the capabilities of zircon immobilizing Pu (Ⅳ) ,Ce(Ⅳ) was used as the simulacrum for Pu (Ⅳ ) ,and compounds in the system Zrx Ce1 - x SiO4 (0≤ x≤0.5) were sintered for 72 h under 1 500 ℃ ,using ZrO2 ,SiO2 and CeO2 powders as raw materials .The phases and structure of synthesized waste forms were character-ized by XRD .Moreover ,the Rietveld structural refinement method was employed to calculate the crystal cell parameters of samples .The results indicate that the phase of samples keeps the phase of zircon when the value of x is between 0 and 0.05 ,and the phase of cerium oxide is found when the value of x is more than 0.05 .The parameters a ,c ,V and x in the system of Zrx Ce1 - x SiO4 (0 ≤ x ≤ 0.05) respectively follow the linear relations.