CAJ | 학술논문

为了探索模拟三价锕系核素在Gd2Zr2O7基材中的快速固化方法,按照化学计量关系Gd 2-x Nd xZr2O7（x=0.42和x=0.86）设计配方,以Gd2O3,ZrO2和Nd2O3（Nd3＋作三价锕系核素替代物）粉体为原料,进行了高温高压合成实验。制备的样品通过X射线衍射分析和扫描电镜分析表明：在压力分别为3 GPa,3.5 GPa,4 GPa,温度为1 573 K,1 673 K条件下保温保压15 min,获得了单相烧绿石结构的Gd 2-x Nd xZr2O7致密烧结体。该方法可为锆基烧绿石陶瓷固化锕系核素提供一种快速高效的技术途径。
위료탐색모의삼개아계핵소재Gd2Zr2O7기재중적쾌속고화방법,안조화학계량관계Gd 2-x Nd xZr2O7（x=0.42화x=0.86）설계배방,이Gd2O3,ZrO2화Nd2O3（Nd3＋작삼개아계핵소체대물）분체위원료,진행료고온고압합성실험。제비적양품통과X사선연사분석화소묘전경분석표명：재압력분별위3 GPa,3.5 GPa,4 GPa,온도위1 573 K,1 673 K조건하보온보압15 min,획득료단상소록석결구적Gd 2-x Nd xZr2O7치밀소결체。해방법가위고기소록석도자고화아계핵소제공일충쾌속고효적기술도경。
In order to investigate a rapid method to incorporate simulated trivalent actinides into Gd2Zr2O7 host phase,synthesis experiments were conducted at high pressure and high temperature using the mixtures of Gd2O3,ZrO2 and Nd2O3 powders as starting materials with stoichiometric Gd2-xNdxZr2O7（x=0.42 and x=0.86,Nd3＋ as a surrogate of the trivalent actinides）.The samples prepared at pressures of 3 GPa,3.5 GPa,4 GPa and temperatures of 1 573 K,1 673 K with 15 min holding time were analyzed by XRD and SEM.The results indicate that Gd2-xNdxZr2O7 compounds with single phase isometric pyrochlore structure and densely sintered compacts were gained.The applied method in the present study provides a rapid and efficient approach to study the immobilization of actinides in zircon-based ceramic hosts.