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首页> 外文期刊>Advances in Applied Ceramics >Microstructure and performance studies of (Mo, Ru, Pd, Zr) tetra-doped gadolinium zirconate pyrochlore
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Microstructure and performance studies of (Mo, Ru, Pd, Zr) tetra-doped gadolinium zirconate pyrochlore

机译：（Mo，Ru，Pd，Zr）四掺杂钆锆烧谱的微观结构和性能研究

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摘要

Proper disposal of nuclear waste with multi-nuclides and multi-valence is still challenge. A series of (Mo, Ru, Pd, Zr) tetra-doped Gd2Zr2O7 ceramics were studied to understand the microstructure and performance evolution of nuclear waste forms that immobilised simulated waste after trialkyl phosphine oxides (TRPO) process. The structure of as-obtained samples were tested by X-ray diffraction, Raman, scanning electron microscope, electron back-scattered diffraction, and energy-dispersive X-ray spectroscopy, while the mechanical and chemical performance were characterised by Vickers hardness and aqueous leaching method. The results indicate that the mechanical behaviour are closely linked with the phase structure, and the highest Vickers hardness is obtained at the phase turning point. The leaching results show that the normalised leaching rate (LR) of the doped elements decrease in the order of Mo, Ru, Pd, Zr. After reaching equilibrium, their LR are as low as 4.12 x 10(-4) g.m(-2).d(-1), 1.50 x 10(-5) g.m(-2).d(-1), 1.30 x 10(-5) g.m(-2).d(-1), and 2.09 x 10(-7) g.m(-2).d(-1), respectively.
机译：正确处理核废料与多核素和多价仍然是挑战。研究了一系列（Mo，Ru，Pd，Zr）四掺杂Gd2zR2O7陶瓷，以了解核废料的微观结构和性能演化，其在磷酸三烷基氧化氨酰氧化物（TRPO）过程中固定的模拟废物。通过X射线衍射，拉曼，扫描电子显微镜，电子背散射衍射和能量分散X射线光谱来测试AS获得的样品的结构，同时通过维氏硬度和水性浸出表征机械和化学性能方法。结果表明，机械行为与相结构紧密相连，并且在相转向点处获得最高的维氏硬度。浸出结果表明，掺杂元素的归一化浸出速率（LR）均按Mo，Ru，Pd，Zr的顺序减少。达到平衡后，它们的LR低至4.12×10（-4）gm（-2）.d（-1），1.50 x 10（-5）gm（-2）.d（-1），1.30 x 10（ - 5）GM（-2）.D（-1）和2.09 x 10（-7）GM（-2）.d（-1）。

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  • 来源
    《Advances in Applied Ceramics》 |2017年第6期|共6页
  • 作者

    Shu Xiaoyan; Fan Long; Hou Chenxi; Duan Tao; Wu Yanlin; Chi Fangting; Ma Dengsheng; Lu Xirui;

  • 作者单位

    Southwest Univ Sci &

    Technol Fundamental Sci Nucl Wastes &

    Environm Safety Lab Mianyang 621010 Sichuan Peoples R China;

    Southwest Univ Sci &

    Technol Fundamental Sci Nucl Wastes &

    Environm Safety Lab Mianyang 621010 Sichuan Peoples R China;

    Southwest Univ Sci &

    Technol Fundamental Sci Nucl Wastes &

    Environm Safety Lab Mianyang 621010 Sichuan Peoples R China;

    Southwest Univ Sci &

    Technol Fundamental Sci Nucl Wastes &

    Environm Safety Lab Mianyang 621010 Sichuan Peoples R China;

    Tohoku Univ Inst Multidisciplinary Res Adv Mat Sendai Miyagi Japan;

    Southwest Univ Sci &

    Technol Fundamental Sci Nucl Wastes &

    Environm Safety Lab Mianyang 621010 Sichuan Peoples R China;

    Southwest Univ Sci &

    Technol Fundamental Sci Nucl Wastes &

    Environm Safety Lab Mianyang 621010 Sichuan Peoples R China;

    Southwest Univ Sci &

    Technol Fundamental Sci Nucl Wastes &

    Environm Safety Lab Mianyang 621010 Sichuan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 硅酸盐工业;
  • 关键词

    Pyrochlore; fluorite; TRPO waste; waste forms; phase transformation; Raman; hardness; chemical durability;

    机译：柏油;萤石;TRPO垃圾;废物形式;相变;拉曼;硬度;化学耐用性;

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