| Gd2-xNdxZr2O7烧绿石的高温高压快速合成 |
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| 引用本文： | 刘莉,唐敬友,袁松,谢华,易发成,罗学刚,肖正学.Gd2-xNdxZr2O7烧绿石的高温高压快速合成[J].西南科技大学学报,2012,27(1):4-7,18. |
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| 作者姓名： | 刘莉 唐敬友 袁松 谢华 易发成 罗学刚 肖正学 |
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| 作者单位： | 1. 西南科技大学理学院,四川绵阳,621010
2. 西南科技大学核废物与环境安全国防重点学科实验室,四川绵阳,621010 |
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| 基金项目： | 国家自然科学基金(51074131);国防基础研究计划(B3120110001);四川省支撑计划(2011GZ0252) |
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| 摘 要： | 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。
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| 关 键 词： | 烧绿石 模拟锕系核素 固化 三氧化二钕 核废物 |
Rapid Synthesis of Isometric Pyrochlore Gd2-xNdxZr2O7 at High Pressure and High Temperature |
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| LIU Li,TANG Jing-you,YUAN Song,XIE Hua,YI Fa-cheng,LUO Xue-gang,XIAO Zheng-xue.Rapid Synthesis of Isometric Pyrochlore Gd2-xNdxZr2O7 at High Pressure and High Temperature[J].Journal of Southwest University of Science and Technology,2012,27(1):4-7,18. |
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| Authors: | LIU Li TANG Jing-you YUAN Song XIE Hua YI Fa-cheng LUO Xue-gang XIAO Zheng-xue |
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| Institution: | 1.School of Sciences,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;2.Key Discipline Laboratory of National Defense on Nuclear Waste and Environmental Safety,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China) |
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| Abstract: | 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. |
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| Keywords: | Pyrochlore Simulated actinides Immobilization Neodymium High pressure and high temperature |
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