Phase and Rietveld Refinement of Pyrochlore Gd2Zr2O7 Used for Immobilization of Pu（Ⅳ）
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2014年第2期
论文作者：卢喜瑞 DONG Faqin SONG Gongbao LIU Ning LI Weimin WU Yanlin WANG Xiaoli
文章页码：233 - 236
摘 要：The phase of pyrochlore Gd2Zr2O7 used for immobilization of Pu（Ⅳ） was investigated, tetravalent cerium was used as the simulacrum for plutonium with tetravalence, and the compounds in the system Gd2Zr2-x Ce x O7（0.0 x 2.0） were synthesized via a high temperature solid reaction method with Gd2O3 and ZrO2 powders being used as the starting materials. Based on the collected XRD data of the gained samples, the phase and microstructural change of compounds were calculated by means of rietveld structural refinement method. The experimental results indicated that the phases of compounds were changed from pyrochlore to fluorite-type phase with the increasing x. The linear relation between a and x was discovered in the range of fluorite-type phase, which accorded with a = 0.52748 + 0.00825 x（0.2 x 2.0）, while V = 0.14668 + 0.00711 x（0.2 x 2.0） was also achieved.
卢喜瑞1,2,3，DONG Faqin2,3，SONG Gongbao2,3，LIU Ning1，LI Weimin2,3，WU Yanlin4，WANG Xiaoli5
1. Key Laboratory of Radiation Physics and Technology (Sichuan University), Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University2. Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology3. Research Center of Laser Fusion, CAEP, Southwest University of Science and Technology4. School of High Energy Accelerator Science, Graduate University for Advanced Studies5. Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics
摘 要：The phase of pyrochlore Gd2Zr2O7 used for immobilization of Pu（Ⅳ） was investigated, tetravalent cerium was used as the simulacrum for plutonium with tetravalence, and the compounds in the system Gd2Zr2-x Ce x O7（0.0 x 2.0） were synthesized via a high temperature solid reaction method with Gd2O3 and ZrO2 powders being used as the starting materials. Based on the collected XRD data of the gained samples, the phase and microstructural change of compounds were calculated by means of rietveld structural refinement method. The experimental results indicated that the phases of compounds were changed from pyrochlore to fluorite-type phase with the increasing x. The linear relation between a and x was discovered in the range of fluorite-type phase, which accorded with a = 0.52748 + 0.00825 x（0.2 x 2.0）, while V = 0.14668 + 0.00711 x（0.2 x 2.0） was also achieved.
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