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首页> 外文会议>Positron and positronium chemistry X >Inhibition of Positronium Formation in Yttria Stabilized Zirconia Nanopowders Modified by Addition of Chromia
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Inhibition of Positronium Formation in Yttria Stabilized Zirconia Nanopowders Modified by Addition of Chromia

机译：添加铬对氧化钇稳定的氧化锆纳米粉中正电子形成的抑制作用

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摘要

The effect of chromia additive on defects in yttria stabilized zirconia (YSZ) nanopowders was investigated in this work. It was found that positrons are trapped at vacancy-like misfit defects at grain boundaries and at larger defects situated at triple points. Moreover, a long-lived ortho-positronium contribution was found in YSZ nanopowder without chromia. Addition of chromia prolongs the lifetime of positrons trapped at vacancy-like misfit defects which indicates segregation of Cr ions at grain interfaces and interaction of Cr with vacancy-like misfit defects. Furthermore, addition of chromia completely suppresses formation of positronium.
机译：在这项工作中，研究了氧化铬添加剂对氧化钇稳定的氧化锆（YSZ）纳米粉中缺陷的影响。发现正电子被困在晶界处的空位状失配缺陷和位于三点的较大缺陷处。此外，在YSZ纳米粉中发现了无色度的长寿命正正电子。氧化铬的添加延长了在空位样失配缺陷处捕获的正电子的寿命，这表明Cr离子在晶粒界面处偏析以及Cr与空位样失配缺陷的相互作用。此外，氧化铬的添加完全抑制了正电子的形成。

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  • 来源
  • 会议地点 Smolenice Castle(SK)
  • 作者

    Oksana Melikhova; Jakub Cizek; Ivan Prochazka; Tetyana E. Konstantinova; Igor A. Yashchishyn;

  • 作者单位

    Faculty of Mathematics and Physics, Charles University in Prague, V Holesovickach 2, CZ-18000, Praha 2, Czech Republic;

    Faculty of Mathematics and Physics, Charles University in Prague, V Holesovickach 2, CZ-18000, Praha 2, Czech Republic;

    Faculty of Mathematics and Physics, Charles University in Prague, V Holesovickach 2, CZ-18000, Praha 2, Czech Republic;

    Galkin Donetsk Institute for Physics and Engineering, National Academy of Science of Ukraine, Luxemburg Street 72, 83114 Donetsk, Ukraine;

    Galkin Donetsk Institute for Physics and Engineering, National Academy of Science of Ukraine, Luxemburg Street 72, 83114 Donetsk, Ukraine;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    positron annihilation; positronium; yttria stabilized zirconia; chromia;

    机译：正电子an灭ron氧化钇稳定的氧化锆；色度;

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